Home

User manual

1. e The main entry Command gt xmatch WED Simbad 4 0 Command hide Simbad Command hide NED Command ch log The script console is opened with em 1097 the menu Tool lt script Comae console This window shows in bracket all the commands equivalent to the action that was done in the graphical interface This is a useful help to learn the syntax It is possible to type directly a command after the Command gt prompt The UP and DOWN arrows let you scroll through the already submitted commands in order to re edit them modify them or execute them again Y The script console Trick Be careful always write after the Command gt prompt If it is not displayed press the Enter key to get a new line Alternative to the console To rapidly give a command without opening the console it is possible to type it directly in the location field used by Aladin to indicate the current position under the mouse Commande grid off Please refer to the Aladin by script section cf below for more information on the control of Aladin in script mode 6 Additional Tools Aladin provides access to a number of supplemental tools The Simbad pointer for automatic SIMBAD identification of objects of interest A capability for using macros for repetitive tasks A mechanism for interacting with other astronomy tools compatible with Virtual Observatory messaging standards A tool for e
2. To add sources to a first selection do as described above but keep Maj Key hold Selection with a research expression Menu Edit gt Search in loaded catalogs Short key Ctrl F Aladin gives you a very effective tool to select sources given the values of their measures To do so on needs to give a research expression in the Search box located above on the right from the measure panel Chercher star 0 Validating the research expression with the Enter key or by clicking on the small Go button leads to the selection of all sources which measures correspond to the research expression Only sources from activated catalog planes will be affected cf activating a plane in the stack If the research expression is preceded by the sign sources to select will be added to the current selection Alternatively putting the sign in front of the research expression leads to deselecting the concerned sources in the sources previously selected i e they will disappear from the measures table The search expression follows a simple and efficient syntax This can be A text chain Include eventually joker keys Any key any combination of keys Eventually it can be preceded by a column name and a test operator lt gt lt gt to restrict the search to a particular column Furthermore The column name can include jokers keys or The column name ca
3. 23 0658055 mises tn menus 23 0666666 Mfosures _ amasan J1602211 230234 80 270 5879166 23 0427777 Pe L CCDM J18024 2302E in 270 59575 23 0354166 300 0 300 0 179 _ 2Mass 118022144 2303 SEE 270 5893333 23 0553055 R lt il c 1999 2005 ULPICHES Centre de Donnees astronomiques de Strasbourg 15 self 343 sic Shida k Tip The relative proportions of the different components can be adjusted using the double crossed arrow icon on the bottom of the tool bar Click and Drag for adjusting the component proportions Guided tour Menu Help gt Aladin guided tour Help gt Show me how to For discovering the main window Aladin offers a guided tour you will find in the Help menu Once activated use your mouse over the various elements of the main window for displaying a description of the pointed component In addition Aladin offers a series of demonstrations available via the Help lt Show me how to Menu During a demonstration a dialog window describes step by step the operations and simultaneously the mouse pointer will move alone displaying the corresponding actions 5 1 1 The stack The stack represents all the data loaded in memory and which can be displayed in a view The stack is structured as a set of plans stacked one above another The user symbolized by his eye observed from the top of the stack by transparency Types of plan f
4. allow for the execution of a set of ale Se ee bject names 15 18 59 72 15 26 21 PHR 1816 1526 py _ __ _ __z a _________ RR Ro S Ex cution du script The macro controller window is divided into 3 parts The top panel allows the input of a script The variables can be specified as 1 2 etc The middle panel allows the input of lists of values to be taken by the variables Y The lower panel controls the execution of the script The script and the input values for the variables may be saved for future use by using the File menu of the macro controller window File gt Save Script Hint When writing a script Aladin automically recognises the syntax and colours the various elements of the script to ease the editing The commands are also clickable to provide immediate help 6 3Interaction with VO tools Plastic SAMP Menu Tools gt VO Tools Aladin provides a mechanism for connecting to other independent applications for example to tools that provide plotting capabilities or for the display of spectra This is achieved through use of the VO Plastic SAMP messaging standard The Principles of Plastic SAMP PLASTIC SAMP permits a dialog between applications so they may send data between them but also so that they may interact For example the selection of a source or set of sources in Aladin also triggers their immediate selection or highlighting in other tools Configuration of VO Tools
5. 89 E 3652 2 HET ACER aida description EXHAUSTIVE cccccccccccsssssssssserccecsesssssssssseseeessesssssesceceececcecccccseeseceeseessescesseses 11 tenerte prepa n 11 Rd 72 88 SEAE Ye T a EE EE ANE E E E A AE a nr a 35 VISO CUIC CC iia initial 12 REG Vs Sere ae reer ee E JPEG 2002200200 ous ETR 48 70 85 A a ARC ESTREA ct 3 Dad 27 E E EE ETS eee ne 2 MU aia 25 WAS Na 1 Measurement ad RO 5 WEDIR A O E10 E 0 2 cascahceseattasiance leases enebesndeess 6 MENU sauce au ad PA n E MO adoos 9 A 01 ee ea 10 EO MESUPCS near een 30 GOULENN tana 61 NS 34 COS AO a a ae aa a 33 A a 21 LE PER RU E04 S RUE RE RS 30 NED cornine endi 1 5 57 Ny SOain id 1 NN cu dure SOC HO dela don AT oo E T A TE E 6 OUR Nec nue 24 Pile cn permutation de DANSE nn dan anna os bioininiacucacardioideos 6 portee locale CIOD ANC scada iii 16 56 NE 13 A ters ice N AMAIA aio 44 O 29 PP ecran ACUVA CLO Minis 13 LOS eee 14 IMPOR Rias 35 OR 14 PES de Dl idee 13 Plein crans 23 31 PITA Sad 88 PNG onii 7 22 48 70 85 PrelerenteS innatas 71 88 o O 72 DIOD ns 25 Propri t s d un plan 15 Raccourci Clair 90 ERA A AA A 29 Reca 18 RICH A ACA A7 17 85 DAU VES arde rain 7 70 Ia 30 72 DClECUION ce MEU ba 34 source DILO EII ra 19 semi transparenNCce 18 SOV A An EO Na PCE RE PE E ES E HO cr rs atta 43 PAULET E A0 usta ces EET AAA TAEL TEET AAR A
6. Aladin facilitates the use of PLASTIC with a window that presents a list of applications that may be connected interoperably with Aladin This window provides a way of easily installing other applications that will then be listed in the Tools gt VO Tools menu the list of tools in s managed dynamically so that it includes the latest versions of those applications VO Tool Application installer amp controller Sel This st shows selection of VO foals compatible with Aladin These softwares are able to cooperate With Aladin by exchanging data cross selecting sources select Install if required or define yoursel Running director Command fine the l O annlications directly Unable from the Aladin menu Contact directly the authors for any questions bugs WOspec Specvien bee igin PPARC supported by JAC Hawaii o TOPCAT SPLAT is available under the terms of the GNU General Public http fstar wwyyiy dur ac Ukf pdraper splat splat wo SPLAT spectral analysis tool Starlink PPA SPLAT is graphical tool for displaying comparing moditving and analysing astronomical spectra stored in NDF FITS and TEXT files as well as the new MDX format lt can read spectra from local disk Install method Java Webstart no installation Running directory Command line Available in the Aladin menu PLASTIC connections To enable two PLASTIC compatible applications
7. Sip Z6 12 67 0756598 5 8Astronomical calibration window Menu Image gt Astronomical calibration Catalog gt Astronomical calibration When Aladin overlays sources on an image it uses the astronomical solution associated to the image This is information that makes the link between each pixel in an image an image and a location on the sky and vice versa There are several possibilities that describe a projection method from a part of the celestial sphere onto a plane tangential sinusoidal Aladin deals with most current projections used in astronomy SINUS TANGENTIAL AITOFF ZENITAL_EQUAL_AREA STEREOGRAPHIC CARTESIAN NCP ZPN Information on the astrometrical calibration Aladin uses 3 methods to obtain the astrometrical calibration for an image When dealing with FITS format image information on the calibration will be obtained with the key words in the FITS header according to the WCS standard For a JPEG image Aladin also knows how to recognize an astrometrical calibration given in its comment segment according to the JPEG standard This calibration has to follow the syntax with FITS keywords followed by a An at the end of each line Finally Aladin also know how to deal with an astrometrical calibration if the image was loaded from a list that is in accordance to the Virtual Observatory Standard SIA Simple Image Access cf 8 1 supported data types Trick In both first cases the FITS
8. lien symbolique vers un autre disque 8 4 3Transparence et cartes graphiques Suivant le type de cartes graphiques et de syst me d exploitation dont vous disposez il est possible que l affichage par semi transparence des champs de vue instrumentaux ou de la superposition des images s accompagne d un l ger ralentissement de l affichage Vous pouvez d sactiver cette fonction via le menu Edition lt Pr f rences de l utilisateur Raccourcis clavier Manipulation de la vue Zoom avant Zoom arriere Glisser d placer la vue Image suivante 1 vue 2 vues 4 vues 9 vues 16 vues G n ration 1 vue par image Uniformiser l chelle Unif l chelle et l orientation Plein cran Visualisation simple fen tre Outils Imprimer Activation de la loupe Activation de la grille Activation info sur image Activation fl che sur cible Mesure de distances Manipulation des plans Propri t s Affichage en t te FITS Manipulations des sources F8 ou molette souris F7 ou molette souris Alt Z Tab F1 Maj F2 F2 F3 F4 F9 Alt S Alt Q F11 F12 Ctrl P Ctrl G Alt G Alt O Alt T Alt D Alt Entr e Alt H S lection de toutes les sources Ctrl A D s lection Chercher par expressions Fen tres Ouvrir un fichier local Charger une image Aladin Ouvrir le contr le des pixels Fen tre de sauvegarde Fen tre de l historique Console des commandes Fermeture Autres Supprimer la s lection Tout supprimer
9. or very large catalogues several hundreds of thousands of objects Created in 1999 Aladin is supporting emerging standards of the Virtual Observatory It is compliant with other visualization and analysis tools IDL VOPlot TOPCAT Specview Splat VOSpec All these key topics allow Aladin to be a powerful data exploration and integration tool as well as a science enabler The Aladin Web site is http aladin u strasbg fr 2 Installation a gt w E aladin exe Aladin dmg install Aladin jnlp The Aladin installation depends on your hardware configuration In any case it only takes a few seconds Local installation Aladin requires only a few megabytes disk space and 256 RAM megabytes is sufficient for most jobs Under Windows URL http aladin u strasbg fr java Aladin exe Under Windows the fastest and easiest way consist to copy the file Aladin exe in a folder or even directly on your desktop That s all Under Mac URL http aladin u strasbg fr java Aladin dmg Installation under Macintosh uses a classic dmg package Download it open it and copy the Aladin app file in your Applications folder That s all Under Linux and other Unix systems URL http aladin u strasbg fr java Aladin jar Installation under Linux is both simpler and more complicated More complicated because there is no single standard installation easier because everything is clear nothing is hidden
10. 12 40 06 9 1 O cu 1124008 38 113711 3 12 40 08 4 1 T O FHc96 1582 PN 190 0282791 OSA FHC96 1533 N 190 0307125 CO FHC96 1522 FH 190 0337666 Hd Ha The first line in the table gives the header describing each column s content Clicking on a box in the headline leads to a sort of the lines by increasing and then decreasing order according to the column s value A small triangle appears on the right of the column s name in order to indicate the sorted column Sorting will be either alphabetical or numerical given the column s content It is possible to resize the width of a column by a click and drag of the right border of a box in the headline If a box is too small to display the total value by moving with the mouse over this box you will temporarily see the box enlarged to unveil the remaining part of the value PHRA 05 0 EURE 92 4 ia a ES Measures from different catalogs If the selected sources come from different catalogs tables with different columns will be shown one after the other The colour of the square at the beginning of the line is useful to disentangle them the colour is the same as the plane in the stack Identifier RA DE me Velocity Redshift Ref Note 11164 J1240 1 1136 12 40 02 6 ll 36 49 ALAYS T CXOU 7124009 56 113645 8 12 40 09 5 11 36 46 xray 2 o C NGC 4594 DEY2 003 113 l2 40 09 7 RL ALAYS JE o L CXOU 7124010 44 113638 7 1
11. Aide des commandes scripts Quitter Ctrl U Ctrl F Ctrl O Ctrl I Ctrl M Ctrl S Ctrl H F5 Echap Suppr Maj Suprr Ctrl F5 Ctrl W Table des mati res Carte de champs 71 CAO cases CAI a 0226 65 CO AO oases EA 58 a e oo a II ETE 8 ITA a bet 51 CDS e 2 CR 3 Champ instrumental 40 CIE 20 37 COM a a eee ed eee 25 Convolution 70 COLL a done ere 25 A se a 86 CAE S 18 48 67 ESS 0 nen 25 SU EE E EEA 25 EP S AIEEE EIET EEEIEE EEAS E E 7O Example nn Ee Stade 4 DE L as OTC EEEE E EE TE E E EEEE EEE EA E EE EE EE ETE 37 AIS se ac In sates E oe rsecse E 57 112 A0 EEE PP A PE E saan o E E OE o PE PE UE EA 37 AI EE ES 44 Memerlocal sail iacia 39 SS SA 50 LR PE AE I ANAE A E 57 LEON peca cues atau catauane tas bio anio 50 DECENA A EEE 51 SMN ea 53 ES 12 75 10 48 85 86 Fonctions de transfert 46 B F AT 29 eos 22 48 85 Graphe de coupe 26 Gila 20 CATP srera A A seieiaweaweoueeaniede 86 HCOMTP SR ne 85 D Ro de da OP EP i cunda 1 HIStOri US 38 RD neen E 86 k 08 e 122 A A E ES A o Co On E E L AAR 69 e RO 0 En T ES 62 86 COCO ER ee canes A9 COT ES a AE RAE aoin 48 66 LA OR 0 21 A E OR N E E AER 8 AI SE 67 A a E UU ae amet ae tie Ni 85 possibilit s d trartement nn nn uote detre CCCA 9 reecnantilonnagen aaa d tient 66 68 ARS parente ee a a a Re RU L s 15
12. Seyfert draw green plus draw pm Proper motions 5 pos pm pos eq ra 5 p pos pm pos eq dec 5 6Catalogs cross match Button Cross Z Menu Catalog gt Cross match objects Aladin has an integrated cross match tool for sources The goal is to establish the shared sources between two catalogs The cross match tool will consider 2 catalog planes do the correlation and generate a new catalog plane containing the shared sources The window controlling the cross match can be access by the button cross or with the menu Catalog lt Cross match objects The three cross match modes Aladin has 3 cross match modes that can be access with the tabs on top of the correlation window A cross match based only on the position A cross match by field based on identical values in a column of each catalog e g an identification A cross match based on the location taking into account error ellipses Corr lateur de catalogues Fe eee ee ee F Correlateur positionnel Corr lateur par champ Ellipses Corr lateur positionnel Seules la separation des positions est utilis e NOMAD RA RAJ2000 DEC DEJ2000 2MASS RA RAJZ2000 w DEC DEJ2000 La S paration est la distance entre sources en sec d arc lt S paration lt Choississez la m thode de corr lation Meilleure solution Positional cross match The positional cross match board lets you give two catalogs as
13. a catalog ease the pointing of corresponding sources for example S pos pm pos eq dec lt 3 mas yr amp amp S pos pm pos eq ra lt 3 mas yr amp amp S phot mag lt 17 draw circle phot mag It is possible not to load a catalog the celestial coordinates will then be those deduced for the DSS image calibration The calibration precision will then be lower Using the translucence Menu image Transparency level to visualise the image that just got calibrated onto the DSS image lets you check simply the quality of the calibration Redo and undo During the creation process or the adjustment of the calibration it is possible to go back to the former solution by using the Redo and Undo buttons at the bottom of the window Calibration of a catalog Aladin also offers the possibility to calibrate or recalibrate a catalog This corresponds to the computation for each source of its celestial position Select the catalog plane in the stack and use the menu Catalog lt Astrometrical Calibration The interface and methods are the same as for the image Moving with the mouse If you are using the calibration method by parameters 1 board it is possible to move directly the sources from a catalog to calibrate in the view in order to visualise the result directly For this you need to click and move a source with the mouse the other sources will follow Along the move the calibration parameters
14. also add a unit for the new column as well as the UCD that should be assoc ed cf 5 5 using filters You can also specify the number of decimals for displaying HIC JCG JC JC JC OC Fonctions values Pointez un op rateur une fonction Cr e la colonne Fermer Computing expression To create a new column one needs to indicate the computing expression that Aladin will use to create values for this new column The writing is done in the central box called Expression The syntax uses usual conventions for algebraic expressions References to other columns keep the syntax column name To avoid writing mistakes the main window gives a list of buttons showing the column names for the chosen catalog A click with the mouse on one of them inserts its reference at the cursor s location in the expression writing box It is also possible to insert operators and arithmetic functions abs cos sin rad2deg by clicking on the respective buttons and selectors Generating a column Once generated with the button Add a new column the new values will appear on the right of the measure table They are displayed in orange brown in order to be easily distinguished from the original measures This new column can be used as any other column sort filter 1f saved it will be kept with other columns E O WC pera ME Ea Lie HIERS l4 3 14 4 I SES 13 0 12 6 1 MAS 1379 13 35 1 0 4000 l4 3 1376 I 0 5
15. astrometrical solution i e a Coordonn es 12000 05 34 09 16 21 55 03 0 celestial position and the corresponding Pos corres x v 436 0 424 5 pixel coordinates in the image the pixel angular size the projection method a Taille du pixel H rotation angle with respect to the north Bornean and at last the direction for which the right ascension increases sym trie en RA Vrai Ge Faux Calibration by WCS header Par param tres Par corresp d toiles par ent te WCS The third board displays FITS keywords glving the parameters for the calibration in the WCS standard If you know this 436 0 standard you can directly modify these 424 5 parameters It is for example possible to 2000 0 use the astrometrical solution from 63 5381597902 another image directly by copy paste of its 21 9174666244 WCS parameters RA TAN DEC TAM FEA L 80235E 5 2 07776E 5 2 0797E 5 1 52179E 5 Trick It is also possible to modify a value in a WCS keyword via the script command set PlanID FITS keyword value cf Aladin by script Calibration by matching stars The second board displays a table used to write a list of XY image coordinates and their corresponding celestial coordinates It is a powerful and flexible method to quickly obtain excellent calibrations We will briefly describe this method here For more details please refer to the online tutorial dedicated to this manipulation h
16. bottom a control band that is common to all forms Reset Delete all selection fields in the current form Clear Reinitialize the current form by putting back defaults values and in particular the target and radius corresponding to the previously loaded data Help Displays an help panel on how to use the window SUBMIT starts the current form query Close Close the window e e oe oe 5 2 6The 4 forms linked to the top tabs Special forms are gathered on top of the window EJ File K ayo rov oe File Local or URL access This form lets you load personal data either via local files or through a web address url It can be either type of data that can be supported by Aladin cf 8 1 The Browse button lets you browse through the file selector in your exploitation system in order to select the file of interest Trick Local data can also be loaded by click and drag of a file icon from a window on your desk or from your file explorer directly into the Aladin window This can also be done in the same way for images or linked that are displayed in a web browser Trick When dealing with a local directory name Aladin will scan the whole content of the directory and sub directories and will build the data tree for the available data It will write a file name aladin_idha that will be used to reload this description in a quick manner for the next time All VO All the VO i
17. butant Mode expert Choississez un filtre pr d fini Ou d finissez votre propre d finition de filtre eg AiBrmagieTO oraw red square Aide 51B1 lt 18 draw 0TYFE 1 Exemples Sauve le filtre Charge un filtre Ee The expert mode board lets you edit filtering rules in the central edition box and offers a list of helps for the writing Numerous commented examples that can be the base for your own filters Buttons giving access to reference columns in the catalogs currently loaded in Aladin A button giving access to graphical actions to perform Buttons giving access to mathematical functions and to available units Unit gene Math Jam ape rater ur Chants CE CHU minute d Sue arcsec seconde d arc 4 ey oe 4 ey ey Operadora deg degr Fit et lectron olt le ll mn fl la CI Ce TT nano Jy Jansky ME ele el mag magnitude Comparten pera or pc parsec rad radian WF ann e Wye Mart You can also reload a filter from a previously saved file Syntax To understand the filter syntax let s start with the following example Let s say that you want to display object types and only for bright sources This filter can be written as follows S B lt 18 draw OTYPE Only lines for which the value in the B column B magnitude is lower than 18 will be kept and the displa
18. draw the action can be on the shape and or on the colour of the plot The syntax is the following draw color shape The edit board for the filter offers two buttons enabling a quick selection of the desired shape and colour Fct de forme H Fct de couleur k ELLIPSE semi maj axis semi minor a CIRCLE parameter FILLCIRCLE parameter FIXEDCIRCLE parameter PMiproper motion R proper motion RECTAMNGLE width height pos angh LINEfral deci raz decz oval square cross plus rhomb triangle dot microdot R Bfred param green param bl RAINBOW parameter black blue cyan darkGraw gray green lightGraw magenta orange pink red White yellow The shape and colour functions can be associated to columns and or to the use of arithmetic expressions Specific functions e e e Example Drawing red triangles draw red triangle Example Drawing ellipses draw FILLCIRCLE filled circle FIXEDCIRCLE Circle with a fixed size not relative to the zoom value in the view PM arrow for which the orientation and the size are a function of two angles indicating a proper motion LINE drawing of a line segment very useful to display the results of a correlation between two catalogs ELLIPSE 0 5 MajAxis 0 5 MinAxis PosAng Example Drawing squares for which the colours is a function of the magnitude draw RAINBOW magB square The CIRCLE
19. for each celestial location previously found it will deduce the pixel value either the closest to the position found or a bilinear approximation of the 4 closest pixels At the end of the process you will get two images on the same pixel grid for a unique astrometrical solution Access to the window D signez limage de reference The window controlling the resampling can be pour le r chantillonnage puis appuyez sur CREE opened with the menu Image lt Resampling You need to select beforehand the image to resample in the stack In the wndow you need to specify the reference image whether you M thode Plus proche pixel 2 Bilin aire wish to keep or not the full pixels or just the grey levels code on 8 bits quicker choose Conserver limage d origine dans la pile the estimation method for the pixel values and at the end say whether the original image needs to be replaced by the newly sampled image or kept in the stack Attention Please note that the resampling methods in Aladin do no preserve the flux i e the sum of the pixel values before the resampling is not the same as the one afterwards Note An image that was resampled shows the following logo in the view E Trick Using the translucence of images cf is a quicker and more flexible alternative to resampling It is however less precise since it does not act pixel by pixel but only based on the four corners and does a global
20. green squares that appeared during the selection Furthermore if these objects are instruments field of view cf 5 2 6 FoV corners can be used to perform rotations Sliding moving Button pan D Menu Edit gt Pan mode Short keys Alt Z It is possible to slide an image by using the Pan button and then click and drag the image in the desired direction In order to get back to the default mode Select move the mouse pointer out of the view panel Zoom Button ZOOM zoom Menu Edit gt Zoom Short key F7 F8 F6 pointed zoom Mouse scroller Aladin enables you to zoom in and out rapidly on a portion of an image In order to perform rapidly only powers of 2 factors are enabled from 1 256 to 512 times A factor of 2 3 was added for convenience Below a factor 14 a nearest neighbour algorithm is used very sharp image Between 1 4 and 2 3 Aladin uses the mean while between 2 and 512 times pixels are duplicated large pixels The zoom factor can be modified in many ways By using the zoom button and clicking in the view keep the Maj key pressed in order to zoom out In order to go back rapidly to the default mode select put the mouse pointer out of the view By using the mouse scroller while the mouse pointer is inside the view By using the contextual menu to the right of the window By using the main menu Edit lt Zoom e e ee e e If the image
21. header can be seen with the menu Edit lt FITS header An image can have several astrometrical calibrations especially if you generated them manually To change from one astrometrical solution to the other you need to display the plane properties and to change the selection R duction astrom trique m thode Ma projection 1 On the other hand it the image does not have an astrometrical calibration Aladin can still generate views but will not be able to overlay sources or graphical additions with celestial coordinates Moving the mouse on such an image will simply write No astrometrical reduction in the location band It will however be possible to add graphical overlays done manually drawing by hand marks These overlays will have no other coordinates than the XY coordinates in the image Creating modifying the astrometrical calibration Aladin enables you to create manually an astrometrical solution for an image that has not got one To do so you need to select this image plane in the stack click on its name and then use the menu Image lt Astrometrical Calibration The calibration window will first ask you to give a name for your new calibration Then it will offer 3 methods to create modify a calibration By parameters By matching stars By WCS header Calibration by parameters Par param tres Par corresp d toiles par ent te wcs The first board displays basic parameters for the
22. m moire utilis e par Aladin En maintenant la souris sur ce compteur une mini fen tre d taille cette valeur et indique le montant m moire maximum exploitable Cette limite d pend de la mani re dont la machine java a t initialis e lors du d marrage d Aladin Pour accro tre cette valeur veuillez vous r f rer a la section correspondante dans le FAQ http aladin u strasbg fr java FAQ htx huge 138 selected sources 1036 sources 5 plans 1 view 10Mo used 1016MB available 8 4 1 Gestion des donn es Gestion des images Aladin sait g rer n importe quelle taille d images Suivant votre configuration mat rielle et la m moire allou e la machine virtuelle Java Aladin pourra choisir diff rentes strat gies plus ou moins rapides Pour les images de quelques m gaoctets l image est charg e totalement en m moire Pour les images de quelques centaines de m gaoctets Aladin va utiliser un espace disque pour conomiser la m moire vive L impact sur la fluidit de manipulation est tr s peu sensible Pour les images de plusieurs gigaoctets Aladin mettra en uvre un acc s en deux temps un premier affichage imm diat en basse r solution puis lorsque le facteur de zoom est compatible avec votre capacit m moire un deuxi me affichage en haute r solution pour la portion de l image visible La m thode pour lire l image basse r solution a t optimis e pour limiter les acc s disques ce qui permet d obte
23. on the method the format and implementation examples please go to http aladin u strasbg fr java FAQ htx Map 5 14User preferences Menu Edit gt User preferences Aladin gathers in the preference window most of the configuration parameters specific to the user You can hence define the following elements The default directory where Aladin will look for or save local files The language for the graphical interface english french italian The default display mode for pixels inversed video colour table When loading an ASCII table the character used to separate columns TAB f Activation or not of dedicated filters cf 5 5 filter usage Translucence level for instrumental fields cf 5 2 6 FoV by default The default image server when querying with a simple astronomical object name The default web site is the server directory cf 5 2 1 the server selector i e the machine that will give at each start the list of available servers the parameters to give According to your computer configuration your preferred browser for the web e ee e ee ee ee ee e ee ee e ee The starting mode for Aladin e g astronomer for professionals undergraduate for scholars or a simple dynamic visualisation window preview cf Sp cifier le mode d ex cution Sous le profile undergraduate pour faciliter l usage ce
24. process 4 Available Aladin processing overview Aladin works mainly on 3 types of data images catalogs and graphic overlays These data types are displayed in one or several views For each of these elements Aladin has a set of tools Catalogue M 52 Seyf 137 095 050 B1229 149 050 137 950 GI SDSI 1229220 00 1415 oso 130 115 SN 199901 SU 137 992 BU 15 2473 S ar 158 0L5 x VHL200C NGC 450 11 Scar 138 021 Mass J1232100341420 IE 135 041 dl We AL Com Dwar 130 105 j Pul 3 970210 Star 137 905 Ful 3 370220 Scar 158 011 Graphique Thil 370711 E ar 127 QuE Elie z Danilo Aladin definitions 4 An astronomical image is a rectangular array of values representing a field of view of the sky The astronomical image is usually provided with other information about its origin and its calibration sky position pixel size type of projection An astronomical catalog is a table or several tables for which each row contains information about an astronomical object called a source 1D sky position physical measurements A graphical overlay is one or several graphical shapes line circle polygon associated to sky positions A view is a projection of a image area on which has drawn catalog source symbols and or graphical overlays The sky position is considered as a couple of angles RA right ascension DEC declination specifying a celestial sphere
25. same region of the sky This is not the case when matching both scales and orientation since it reprojects images using the location of the 4 corners of the image images are identical but pixels have been put out of shape Matched views are automatically selected and can be noticed by their blue frames If the orientation was also matched the affected images are framed in red Locked view Menu View gt Lock view When one double clicks on a view all the other views relative to the same region of the sky will be centred automatically on the clicked location This is also the case if one clicks on the measures cf To prevent this change of central location and or change of zooming factor it is possible to lock a view so that it always keeps the same centre and the same zoom Menu View Locked view A locked view triggers the apparition of a small lock in its bottom left corner Sticked panel Menu View gt Sticked panel In order to prevent the scrolling of one or several views when one 49 1 bsP081 uses the vertical scrolling bar 1t is possible to stick the panel so that it keeps its location For this use the menu View lt Sticked panel A sticked panel triggers red triangulary corners and is not affected by the scrolling bar Moving and paste It is easy to move a view from a panel to the other by doing a simple click drag drop with the mouse By keeping the Ctrl button pressed simultaneously this functi
26. tag a location el I x text Graphical addition to write text ses ee filter Generate filters for catalogs cross Catalogs cross match tool e ee rgb Colour images generator assoc Generate images associations mosaics or animated sequences cont Contour generator ee mglss Activate deactivate the magnification glass pixel Opens the window that controls the pixel dynamics prop Open the properties wndow del Deletes the current element e ee ee ee Activating Buttons are activated depending on the selected planes in the stack Some buttons remain in grey if they are not relevant for the plane type or if the number of selected planes does not correspond to the action to perform Modes and tools The three first buttons are related to the action modes of the mouse in the view in order to select objects move the field of view or zoom in and out see below the three viewing modes These buttons are mutually exclusives As indicated previously moving the mouse pointer out of the view reactivates the default mode Select All the other buttons are related to tools Here will be detailed only the tools those are not described in the other sections of this document The graphic tools dist draw tag and text Menu Overlay gt dist draw tag text Short key Alt D distance The four buttons giving access to the graphical tools to measure distance to draw by hand to place tags
27. the plane with the specified number already exists a new plane will be created at the top of the stack Example Create a plane called MyImage with an DSS ESO image of M MyImage get ESO DSS1 M1 This method is very practical when the script includes artithmetic operations on image planes in the stack addition subtraction multiplication normalisation convolution Example Make an image of the difference of 2 images in J and F bands A get Aladin J M1 B get Aladin F M1 Diff A B 7 2 Make your data visible in the Aladin applet As indicated in section 2 Aladin may be used as an extension of a web browser IExplorer Firefox Mozilla as a java applet This method allows data providers to allow thier users to automatically visualise data images and catalogues in Aladin without having to download or install the software Launching an Aladin applet To start an Aladin applet reuqires simply calling a URL There are many sites which use Aladin in this way see 2 Aladin en applet Hint By default Aladin will start up within the web page It is also possible to launch the applet in a separate window or in a simple preview mode cf 5 1 2 preview For details consult the FAQ http aladin u strasbg fr java FAQ htx startapplet Controlling the Aladin applet To show the desired data in the Aladin applet it is necessary to control it via script commands The script is input via t
28. well as the corresponding locations ra dec If there is no ambiguity column names will have been selected automatically by Aladin It is then necessary to give the upper limit on the offset or even the lower limit offset between sources to be cross matched It is given in arc seconds Finally the selector gives 3 choices 1 When several objects are in the cross match circle only the closest sources will be cross matched 2 On the contrary all possibilities will be kept 3 Another possibility all the sources with no counterparts will be kept Field cross match cross ID The cross ID or field cross match consists in the reunion of sources for which a value of a field is identical in both catalogs This cross match type is dedicated to a field that identifies each sources in a unique manner e g an identification a serial number In data bases this is called joint Toutes les solutions Objets sans solution Advanced options Lance le calcul Ellipses cross match The board to control the ellipse cross match is similar to the one for simple positional correlation The main difference is the possibility to specify not only the columns for the position but also the one for the errors on the position This error should be expressed with 3 fields that define an ellipse major axis minor axis and position angle with respect to the north Choosing the fields to keep When Aladin performs a cross m
29. 1 4 x 1 9 RAS limo Z I232B1HD Elia 31 5 x 311 5 Hite fi ol Z IZII its 31 5 x 33 D rid Z ATID Cita 33 D 33 D Z 1279691H0 Cita 33 01 33 D CHAS ZIELE Z 12328750 Cita 31 51 x 31 5 Epirata Fo dara lG pila Homme Farma Ifthe data are shown as a data tree a right click shows a tree control sub menu Ifthe data are in list format it is possible to sort them by clicking on the headline of A click on an element displays information relative to this data as well as some specific query parameters Each element is preceded by a check box that enables you to select the elements to load Some cases can be checked either manually or by clicking in the view in order to select elements that explicitly contain the clicked location The Reset button lets you de select all checks The delete button deletes the list or the tree 5 2 4 History of queries Menu File gt History Short key Ctrl H All along the session Aladin saves all the information coming from the different data servers that were queried To do so a tree is created in which ramifications represent the different targets visited during the session with a graft of different intermediate results You can go through this data tree and even reuse it with the menu File lt History Historique de la session AE Historique de la session 5 2 5 The control band The server selector shows at 1ts
30. 2 40 10 4 alli aie Sl xray E Oo CI B4297 1 2 CICI 190 0441541 11 6128333 30 0 30 0 4 The headline always corresponds to the last selected line clicked with the mouse or the one below the mouse pointer The colour of the line below the headline is also the same as the colour of the corresponding catalog Links and buttons As in a web browser the blue underlined values are links to additional information avallable on the web The web address that will be used is displayed on the bottom of the Aladin window when the mouse pointer moves over the link By clicking with the mouse on a link a web browser is opened and loads the corresponding web page In general the first link in a measure line will load the original record in the website that was gave the catalog SIMBAD NED Vizier Some values can also be displayed as a button Like a web link activating such a button leads to the loading of additional data via the internet However instead of leading your web browser the loaded data will be added to the stack in order to be visualised immediately in Aladin Most often such data are archive images associated to an observation list IC Image HI LAT 12 40 22 Independent window The measures panel can be detached from the main window by clicking on the logo at the top right Ed This is useful both to get a larger working space but also to work more easily on a larger number of measures Please note that t
31. 281 MASS 70993 3023 45592 CAC 9331 SC1 2 The HST Guide Star Catalog 1 2 25242 ycho 2 The Tycho 2 Catalog 08 Feb 2000 2540 OMAD1 The NOMAD Catalog USNO B1 UC 1117613 MC14 The Carlsberg Meridian Catalog 14 95858 DSs D The SDSS Photometric Catalog Rel 218218 DEN 55220 C Z000 2 Astrographic catalog mean epoch a 4622 ositions and Proper Motions OU USNO A2 I gt O Description Mb of KRo Hubble Space Telescope Archives 402 lOgINT___ The Isaac Newton Telescope observa 8 logChan Log of Chandra X ray Satellite 9 logxMM Log of XMM x ray Satellite 8 5 2 9Characteristics of the SkyBot form The SkyBot tab opens a form to access solar system objects except MA planets The institute of celestial mechanics in Paris IMCCE has given skyBot Aladin access to its ephemeredes database which enables with an excellent precision to find asteroids and other solar system objects that are on your image giving its epoch Solar system object database from IMCCE Renseignez tous les champs puis appuyez sur le bouton CHERCHER 1 Rayons E cocinas 9 14 E n PR 1997 12 16T07 19 11 Observer location 500 Max uncertainty nn Fitre CANA nn Obtenir les coord pour cet objet p The field to give the date is automatically given with respect to the current image Note The epoch given in the image header is not always very precise hence possible location
32. 7 3 Aladin extensions plugins Menu Tools gt Plugins Aladin is written in the Java programming language and it is possible to add extensions written in Java to extend the capabilities Installing plugins The installation of plugins is done by the Plugin Controller accessible in the menu Tools lt Plugins lt Plugins controller This opens a window that shows all the installed plugins The Download button shows the available plugins on the official Aladin site Gestionnaire de Plugins AE ATTENTION Las plugins Aladin sont des partions de coda Java urt11124ble8 par Aladin Ils ont 4 4 d velopp s par des utilisateurs d Aladin et non pas par l guipe du CDS Ces codes sont Fournis Shs aucun garantie Four toutes questions ow rapport d erreurs Feuzllez contacter directement Ies AauCeLESs otre r pertoire 4 pluges Cr iDecuments and Settings a andani aladin Pugs Mouse Tracking 2 _ 550 Ephemeris Calculator AT A Ed Pure j 2 ANH Jerome Berthier DACCE ORSPHYCHRS Version 1 2 April 2008 Category Origin http Mouimoce riwebservices Tirade adadni php the 5390 on the celestial sphere positional ephemeris or as a FITS image which show the Simulated aspect of the 550 as seen from the DDS2e VEC Start The plugins must be installed in compiled form class ou jar in the aladin Plugins directory in your home area HOME on Unix document and Settings yourName on Wi
33. A ART T EET 41 O A RAS O 40 ASP E 41 O 5 57 SS o O II E A TT 43 57 PP O 5 41 S be PNE AAE ANE AAE AE ANE AA matures 86 SLOAN 1 SOUL C iii iii o ail u x tees 0 E ee ais acess C e e REE e E e E eR E RE A ARR ARER EAR 17 A RO So I en 29 COLOS E ETEA ecw ccc SETE T EE PET ass ae 32 SS O A E bea a ieuedanause 30 Surcharge graphique GEI BE A DER CO LE ii DOM SI naa aU eB GDR DR eee Re eer eet er eet IT WOT A BILE ccssestadseahevsoastaneuecadeisuatise 70 85 A deca bre ensenada TIAA CNS LLY LE AU CRT TR op rations possibles A di ni US AO ni nina a A Ls ee BP EE NGC 1313 NGC 1808 NGC 2203 NGC 2359 NGC 2442 NGC 4438 NGC 6070 NGC 253 Orion nebulea RCW 38 Hercules cluster M1 M16 M65 M83 M96 Compositions 2 couleurs DSS2 J F ou R D r alis es par Aladin Aladin Manuel de l utilisateur Version du 22 juillet 2008
34. Aladin User manual Pierre Fernique co O di a un x Y 4 Ra i gi L 8 0 1 Introduction Aladin is an interactive software sky atlas allowing the user to visualize digitized astronomical images superimpose entries from astronomical catalogues or databases Most of available image and catalogue over the Internet are available and notably SIMBAD NED VizieR MAST STScl CADC HEASARC SLOAN NVSS Aladin is dedicated to professional astronomers It can be also used by teachers or undergraduate students or amateur astronomers It is free under ULP CNRS licence see the copyright It has been translated in English French Italian Russian Chinese Aladin is mainly used for Visualizing and checking catalogues and images Searching and browsing available astronomical data Preparing observations Creating field charts oe gt ee e ee e The Aladin software can be used directly in a Web page for dynamically visualizing astronomical data into a simple navigator such as Internet Explorer or Firefox Many institutes are using this way for providing their own data to their users NED CADC MAST ESAC ESO Aladin is developped by the Centre de Donn es astronomiques de Strasbourg CDS It is compatible with most computer configurations including Windows Linux and Mac It does not require significant resources unless it has to handle very large images several gigabytes
35. CA pos eq dec Note Some UCD should not appear more than one time in a table meta_main Hence if the correspondence is displayed on a red background it means that there is a conflict between UCDs To avoid this you need to click on the dominating column name by holding the Ctrl key Without further indications the first column from the first catalog will be dominating 5 7 Column computer Menu Catalog gt Add a new column Catalogs give some measures that can be seen in the measures panel by selecting the sources cf measures These measures are displayed as different columns with values Aladin gives you the opportunity to add columns obtained by computing on the other columns values For example it is possible to create a J K column giving the difference between two magnitude columns J and K Calculateur de colonnes Access to the window The window to control the computing Ajout d une colonne au plan Simbad of a new column can be accessed Nom either by the contextual menu in the UCD PA measures panel right click or al CTRL click or with the main menu Limite o s Catalog add a new column ee 4 Y d cimales this last case you need to specify Expression eg fBmagp iVmag beforehand the concerned catalog by B selecting it in the stack Fointez un nom de colonne General information on the new column To create a new column you need to specify a name You can
36. Contours PA Dossier The plans may be of different types depending on the nature Fi gt of the data they contain They are marked by specific logos E Filtre easily identifiable Catalogue Les plans peuvent tre de diff rents types suivant la nature S cube des donn es qu ils contiennent Ils sont rep r s par des logos LN Image couleur sp cifiques facilement identifiables 5 Tr s gde image A Image en transparence The stack and its associated views i gt Image In the most simple case the stack would contain only one image and be overlaid with a number of catalogue planes A complete view of the stack can be obatined in this case with all the catalogues shown overlaid on the image There are two methods for creating views SY Click and drag the plane from the stack into a view window Or simply activate the plane Activation of a plane is done by clicking the suqare tick box of the plane in the stack or on the plane logo itself When active the plane logo appears shaded in gray a Y In breif the activation of a plane automatically creates a view with all the graphic plane that may be projected onto it De activating a plane will however only hide the view from the current view windows oss possi page Te F MiB Dessin 3 Ll 6 49 3 4 7 08 LE Hint Itis possible to create a view using only a catalogue plane without being overlaid on an image behind Create the view by clicking and dra
37. FILLCIRCLE and RAINBOW functionalities take two optional parameters giving the minimum and maximum parameters used to draw For example draw CIRCLE A 1 10 will draw circles proportional to the A column values the smallest circle will have a 1 pixel radius the largest circle 10 pixels in 1x zoom If the draw action is on a string e g draw star or on a reference to a column e g draw ObjectClass the string of the column value will be displayed Column names or UCD The reference to a column name is usually done with the column name using the COLUMN_NAME syntax This method implies that the filter is more or less dedicated to a specific catalog since one needs to know explicitly the column names In order to describe filters in a more generic manner for example taking into account the magnitude independently of the column name given by the author Aladin uses UCD UCDs or Unified Content Descriptors characterize columns independently of catalogs For each column a UCD was associated and gives you the physical quantity associated to the column For example a column with magnitudes will be labelled with the pos mag UCD The UCD s list is maintained by an international committee and is available here http www ivoa net Documents latest UCDlistMaintenance html Most of the astronomical servers give their catalogs in VOTable and already contain these valuable UCDs When a filtering rule uses a UCD t
38. G GIF FITS image from your working environment Windows desk Linux Desktop and or from your web browser with a particular view Current view The current view 1 e the one on which zoom functions will operate is framed with a blue contour One can click on a view in order to select it as the current view By keeping the Maj key pressed it is possible to select several view simultaneously for example this can be used to select images that will be deleted It is possible to see the current view blue frame in monoview by switching back to a single panel The other views will not be deleted and will remain accessible either through the vertical scroller bar on the left of the window or by switching back to a multiview mode The current mode can also be seen in full screen menu View lt Full screen or in simple window mode menu View lt simple window see below Matching the views Icon match ie Menu Edit gt Match Short key Alt S Alt Q Within the multiview mode it is possible to match the scale and even the orientation of different images sampling the same region in the sky These functions are accessible via the menu View lt Match scales and View lt Match scales and orientation respectively For the second case the match button can also be used Matching scales does not affect pixels it only select automatically the closest centre and zoom factor in order to visualise the
39. Go button and using the two arrows on each side of the input box enables you to select the previous following measure line that corresponds to the expression The up arrow and down arrow keys or the mouse scroller also let you switch to the previous or the next measure respectively If the expression is empty then the previous following line will simply be selected a Ep Deselect Deselecting the line is done with a simple mouse click in the measure panel outside a web link or a button Prevented behaviours If a line of measure is selected some behaviours are be automatically prevented The headline of the measure panel remains the one associated to the selected line even if the mouse moves outside the corresponding line this enables you in particular to perform a sort on this table Moving over the other sources in the view with the mouse will not scroll through the associated measures anymore Checking the measures Menu Edit gt Select Unselect Contextual menu Select Unselect Keep A small colored square appears on the left of the line of MAIN ID OTYPE measures The colour code is linked to the data origins With PA ae this square the lines can also be checked and thus the SAN corresponding sources so that they can be easily found later O fracos pu 190 on V FHC96 PN 190 Two menus let you manipulate the checked sources SY The contextual me
40. Gu H SPA pee te El dr cepa o 7 CDS SIMBAD query result AM Tiie n ee A other guearr dentier Gsordinats Crena Bibboeraphy Secret anote query query Query query aibrrassion CH ped queen 4 47 A GAS SIME HD el 1 0625 2006 Oe TOES Te 414 Avaitable dara Earc data derntifisrs Plot mars Piblorrapty Menaurerents External arh Hotes Pasic data 4C 47 36A Sevfert 2 Galaxy quar Ground with rodas E El Other sheit pipes Sek 06 APS ENG LEDA 2HA5X ROG TC SC I 1492 ASS 512004 VDD AU jee A Ce ee RE 122 SAAD LPAI 1 14 12023 DALST BD FLE iF EPS T76 Red 40 661 DE se ICRS coad ep 200 2000 13 9 55 37 47 ii 44 4 een DEPP FE EPA h E 1999455 18 DEC FES coord ep 2000 e 2000 LY FF 33 37 HiT DE 48 8 Cee VEB LEPE EF LL P IRAS LFY AO FE coord Cep 1950 1935 13 FF 43 33 47 27 kk Weber 165 0 ee j F LENS DE dee Gal coord ep 5000 eq 20001 MBA NIE 08 5614 War Le LERS LEE gS O Racial relocis S Rede fice hase Ge f i E PHACA itt FF Saving 7 Aladin offers several saving options for keeping the current view as an image for getting an EPS file for scientific publication etc Use the menu File lt Save the current view PNG for getting an image file of the current view in a format that you will easily use in any desktop tools After this brief Aladin introduction let s go deeper to the available
41. Simbad du COS Certain plane may be made seml http simbad u strasbg Frisimbad sim all Ident 054 34431 97 transparent so that planes beneath it in the stack may be seen This is useful when comparing images and also when overlaying instrument field of view planes To control the transparency of a plane use the Fresd des O object class magenta coloured slide bar on the position uncertainty logo of a plane nie aucun filtre Simbad Filter Simbad Filter colorized proper motion This Filter on the stack for editing appliquer reme E DAN u671270 E ATA WwrPc2 co H 2224 DSS1 EP Hint the level of transparency may also be controlled a larger slide bar and with percentage values from the properties window l Niveau d Opacit Transparence Various Hints and Tips At the top of the stack there is an eye icon looking down on the stack EX Clicking the eye hides all the graphics planes leaving on the image planes visible Clicking again brings un hides the graphics planes For dense catalogues the gaphics symbols may hide a large part of the image area If you move the catalogue plane under the image the image becomes visible and even though the sources of the catalogue plane are not visible they may still be selected Catalogue planes at the top of the stack will by default be projected onto all lower image planes In the case of multiview display it is often useful to restrict t
42. We suggest you to copy the Aladin jar file in a folder And then launch Aladin in a console by hand with this following command line java jar Aladin jar Tip You can write a small file containing the parameters required for your jobs For instance if you want to launch Aladin with 1 gigabytes RAM you can create a file called Aladin containing this single line java Xmx1024m jar Aladin jar Note Aladin can be used with local data However it is better to have an Internet connection gt 512Kbit s for also accessing astronomical databases For details about Aladin installation or for downloading the latest beta version see this Web page http aladin u strasbg fr java nph aladin pl frame downloadin Aladin in applet Aladin can be used without any installation directly in your Web browser By using one of these following URLs your browser will automatically load the Aladin code and then will execute it in its own window Aladin has been designed for starting as fast as possible less than 2 megabytes ee ey France Strasbourg CDS http aladin u strasbg fr java nph aladin pl Canada Victoria CADC i hia nrc United Kingdom Cambridge Japan Tokyo ADAC India Puna IUCAA USA Harvard CFA ee ee e ee e e You must accept the applet execution certification If not Aladin will start but in crippled mode reducing its per
43. a Aladin sous la forme de plugins compatibles cf Concr tement il s agit de fichiers class ou Jar Ce r pertoire peut lui m me contenir des sous r pertoires qui suivront la logique du packaging java L ajout resp la suppression d un fichier jar ou class dans ce r pertoire entrainera la pr sence d un nouveau resp la disparition d un plugin dans le menu Outil gt Plugins red marrage n cessaire VOTools pour 1 OV Le sous r pertoire VOTools contient certains paquetages jar fournissant le code des outils VO crit en java par exemple VOPlot jar Il contient galement un fichier nomm VOTools dic de description des outils VO actuellement reconnu par votre Aladin La suppression d un fichier jar supprime l outil VO correspondant La suppression du fichier VOTools dic supprime uniquement la connaissance des outils d j install s disparition du menu Outil lt VOTools aladin nnnnn les images en cours Pour chaque session Aladin cr e un sous r pertoire unique nomm aladin nnnnn I y stockera les pixels de certaines images en cours d exploitation A la fin de la session Aladin supprime ce r pertoire S il n a pas pu le faire ce sera la session suivante qui effectuera le m nage Astuce Si vous ne disposez pas de place suffisante pour le r pertoire cache d Aladin quotas vous pouvez utiliser un
44. a high contrast while the sqrt will lead to an image with some contrast and the pow2 will lead to an image with low contrast Colour tables Aladin has some classical colour tables for astronomy Not only can they be adjusted via the transfer function control as described above but they can also be reverted Table des couleurs Here is the list of colour tables with a simple linear transfer functions and how they look in normal and revert mode Gray BB E Fa e ve oe e Fire Note IDL users can also dynamically load a colour table with the IDL Aladin library cf Quick pixels exploration By moving above the colour strip on top of the window with the mouse pointer Aladin will temporarily use a specific colour table to enhance the location of the corresponding pixels in the image The image will be displayed with grey levels and corresponding pixels in red a Toe Se Modifying initial thresholds As indicated in the introduction each time an image is load Aladin proceeds to an autocut It is however possible to modify the initial upper and lower thresholds by specifying explicitly in the control band If you click on the use Aladin autocut algorithm Aladin will proceed again with its autocut algorithm without looking for meaningful pixels in between the limits you indicated If the check is not activated lower and upper threshold will be taken as specified The button Reset
45. a the menu Tool lt Object name resolver Trick If the view is still empty typing a location or an astronomical object identification will create three planes by automatic query of the DSS image server the CDS one by default of SIMBAD and of NED Seript command The location field can also be used not only for a location but also to type any other script command cf Aladin with script Let s look at the bottom of the main window the measures panel 5 1 6 The measures The measure panel is located at the bottom of the Aladin main window It is used to visualise measures associated to the sources It is a really powerful tool that enables you to select sort and filter tables Only selected sources the selection is obtained individually or collectively in the view with the mouse cf appear in the measure panel These measures are displayed as a table in which each line corresponds to the values associated to a source Selected sources are framed with a green square in the view Moving the mouse on the selected source makes it blink and show simultaneously corresponding measures by highlighting the line in blue Vice versa going onto a line in the measures table makes the corresponding source blink if it is visible Furthermore selecting a line in the table by clicking on it will move the view so that it becomes centred on the corresponding source ais A i A OU J124006 96 113721 9
46. alement possible de sp cifier le param tre outreach sur la ligne de commande d Aladin Dans ce cas l tudiant n a pas la possibilit de changer de profil en cours de session De m me l utilisation du param tre preview d marrera Aladin selon le profil preview c est dire simple fen tre cf plein cran et simple fen tre La touche ESC permet de faire r apparaitre les l ments manquants de l interface Astuce En mode preview Aladin permet de visualiser tr s facilement des images couleurs non n cessairement astronomiques La fonction glisser d placer permet de charger en un clic une image issue d un navigateur Web ou du gestionnaire de fichiers les fonctions de zoom et de d placement en font un outil tr s souple pour la consultation de photos 8 2Les types de donn es support s Aladin supporte la plupart des formats utilis s en astronomie que ce soit pour les images pour les catalogues ou pour les groupements de donn es D autre part il prend en compte les algorithmes de compression les plus r pandus Format Type de donn es Nina Commentaires FITS Image WCS LD Pas de limite de taille JPEG Image couleur WCS 24 lt 100 Megapixels GIF Image couleur EA PNG Image couleur EA Compression image Applicable sur les images FITS AE FITS ER uniquement FITS RGB Image WCS EA FITS CUBE Cube d images WCS ED lt 1024X512X512 Compression image Applicable sur les ima
47. approximation for the other pixels location 5 12Arithmetic operations on images Menu Image gt Arithmetic operations Image gt Convolution Image gt Pixel normalisation 0 1 G n rateur d images ariihm tiques AR Chosir eur mages el Poperabti n sihik pui ng Bg e gt e 4 ao ed glade a fn Addition subtraction multiplication and 1 POSSILLOSS2270 m51 division JNPOSSILF 0552 270 mb51 A Aladin offers a simple interface to compute simple DENIS basic operations on a couple of images addition Mormalksation pr alable des piosk 0 1 a DL oe E _ n subtraction multiplication and division The echartionnage Si n cessars Plus proche peel _ Bin are R control window can be opened with the menu cr m re ito rome Image lt Arithmetic operations accessed only if at least two images are in the stack Aladin will proceed pixel by pixel by doing if needed a resampling of the second image so that it corresponds to the grid of the first image cf 5 11 One can ask to do first a normalisation of the pixels in the two images so that their values are located between O and 1 real format The result from the operation will be seen as a new image plane in the pile 5 Addition 0 Soustrsction Multiplication C Division Trick If you wish to use a scalar as the second operant rather that an image e g add a given value to all pixels you can use scripts com
48. atch a new catalog plane is created for the results Each cross match pair will correspond to a source in the resulting plane and by default all the measures for the two corresponding sources will be kept To avoid possible confusions on column names they are automatically labelled with _tab1 and _tab2 respectively v EZE NOMAD v EEE 2MASS v LE DSS1 V SERC By using the Advanced options button located in each of the cross match forms it is possible to explicitly choose the columns to be kept as well as to specify suffix or prefix for column names Catalogue NED Column prefix Column suffix Choose columns to keep selecta Welocity Redshitt Ret Note Catalogue Simbad Column prefix Column suffix Choose columns to keep Select ail MAIN ID OTYPE FA DEC COO_ERR_MAJA COO_ERR_MINA COO_ERR_ANGLE PMRA Columns and UCDs When the mouse pointer moves over the buttons that select columns the buttons in correspondence between the two catalogs will be displayed on a blue background This correspondence is based on shared UCDs for these two columns a UCD is a single attribute for a column and characterizes its physical meaning e g pos eq dec for a declination measure Cf the UCD description in section 5 5 Velocity Redshift Ret Note mano owe ln COO_ERR_MAJA COO_ERR_MINA COO_ERR_ANGLE P l R A BIBLIST U
49. ated to large surveys Missions a form dedicated to observations lists All Vizier All the Vizier catalogs O Le service des catalogues VizieR Indiquez une position et lidentificateur d un catalogue AT tout Catalog Rayon 14 0 colonn Vous ne connaissez pas lidentificateur G n rez une liste de catalogues potentiels partir de mots cl s Auteur texte libre proper motion Wavelength Mission Astronomy optical Lia EUY atay Gamma ray Binaries cakachsmic Binaries eclipsing Binaries spectroscopic Blue objects The general form All VizieR lets you give either the name or the number of the catalog directly CDS ADC nomenclature in the specific field or to obtain a list of catalogs that fulfil some criteria free text authors wavelengths mission names or astronomical keywords This query can be restrained by a cone search specified by the Target Radius fields This functionality is extremely useful to determine all the catalogs that have at least one observation in this field You can then check in the list the catalog s for which you would like to get the sources and then click on the SUBMIT button Trick A click gives a catalog plane It can be useful to spread your results in different planes in order to manipulate them more easily afterwards 26 catalog s found around mi AE Catalogs Category De Y Description I NOMAD Ca
50. ation that will appear in the next session as a possible language alternative in the supported translation list Details Expressions that are not translated will appear in english Aladin supports non ASCII languages e g Chinese and eventually written from right to left e g Persian It is possible to complete or translate an existing translation To do so you first need to load this language then to press the new translation button while keeping the language and 2 letter code empty Your additions to the translation will only apply to your Aladin installation Note If you wish you can contact the CDS and the Aladin development team in order to have the whole user community benefit from your work Your translation file will be saved in the same directory as the configuration file for Aladin see above with the name Aladin language version perso string 5 15 The script console Menu Tool gt Script consol Short key F5 All the actions that can be done with the graphical interface can also be done with online commands The goal is to be able to use Aladin in script mode to do repeatable works indicate treatments to do or control Console Aladin DER Aladin remotely mes Aladin 15 waiting commands Command get aladin dss1j ml These commands can be comand get simbad ul submitted through different Comando get NED ml channels among which Command grid on
51. basera sur l extension de fichier ajs et ou sur la pr sence en premi re ligne du commentaire suivant AJS 8 3Standard FITS et calibration astrom trique Pour la calibration astrom trique Aladin suit le standard FITS officiel le premier pixel en bas gauche est num rot 1 1 et la position c leste correspondante est centr e sur le pixel Concr tement la coordonn e en bas gauche du premier pixel est donc 0 5 0 5 A noter IDL ne suit pas le standard FITS officiel la coordonn e en bas gauche du premier pixel est 0 0 Aladin reconnai t plusieurs m thodes de calibrations WCS standard ancienne m thode DSS1 ainsi que la plupart des projections courantes 8 4Performances et contraintes techniques Le d veloppement d Aladin a suivi deux r gles 1 Garantir la meilleure compatibilit possible avec le mat riel et les syst mes d exploitation existants 2 Offrir les meilleures performances possibles dans ce contexte Pour r pondre a ces deux contraintes Aladin tire le meilleur parti du langage de programmation Java Les applications java n cessitent la pr sence d un moteur java install sur votre ordinateur La plupart des syst mes d exploitation ont d j un moteur java install par d faut Si ce n est pas le cas il est possible de l installer gratuitement depuis le site http www java com Un compteur situ en bas a droite de la fen tre indique la quantit de
52. cation appear close to a tag For this select the tag of interest and use the contextual menu right click or CTRL click and select label the selected objects For a drawing done by hand draw tool it is possible either to keep the mouse button pressed in order to draw continuously or to click several times in order to draw straight lines one after the other In this last case it is necessary to put the mouse pointer out of the view in order to stop the drawing process or to double click on the last point In order to create a new plane so that the graphical additions will not be in the same graphical plane it is mandatory to press the Maj key while activating the tool Image cut associated to the distance tool When the double arrow used to measure a distance has been selected in the view the zoom panel bottom right of the main window is replaced by an image cut showing the pixel values along the line measuring the distance If this line is moved around in the view the plot evolves as a function of the location in the image Furthermore if you move your mouse over the plot a red horizontal line appears and gives the angular distance and the number of pixels for the peak below This method is useful for example to make a quick approximation for the width at half maximum of a star On top of this for an image in real colours cf 8 2 supported data types the levels for the three componen
53. compare easily two images at different wavelength L lets you adjust the levels and colours of each contour afterwards 5 5 Dealing with catalog filters Button filter tiltre Menu Catalog gt Create a filter Filtering catalogs in Aladin is a powerful tool to visualise sources in a clever way Default behaviour no filter By default Aladin displays sources with graphical symbols all the same symbols for a given plane shape and colour The shape is a function of the source number smaller symbols for denser catalogs Colour and shape can be modified afterwards by using the properties related to the catalog plane menu Edit lt Properties S08 A A E Forme par d faut It can however be interesting to constrain the shape and colour of the symbols based on the measure values associated to each source To do so you need to use what is called a filter in Aladin Filter definition In Aladin a filter will be applied to E N Er one or several catalog planes in order x Ue gt ET to modify the way graphical symbols eae sia are displayed in the view It works eet ee o k with one or several rules that will Far A na c h MUTE indicate to Aladin how to draw a 122 Simbad sources with respect to values given in the source measures Hence it will 7 be possible to plot circles that are 4 p Nova proportional to the magnitude po v A DSS1 E POSSI elli
54. contain all the original images in the projection grid from the reference image The image obtained will be displayed and can be manipulated like any other image in Aladin The average will be used for regions that overlap Msc ime LS POSSILF DSS LS POSSILF DSS Cube or animated sequence A data cube is displayed in Aladin as an animated sequence i e image after image The logo in the stack is seen by a double line at its bottom as a symbol of the depth of the cube How to manage a cube is described in the section on the view in MP AP OOS Trick It is possible to add a new image to an existing data cube To do so you need to click and drag the plane logo for the new image on the view where the cube is displayed After a short break needed to resample the new image the scrolling through the cube will start again with an additional image 5 11Resampling images Menu Image gt Resampling Principle Even if it displays the same region on the sky each image often has its own astrometrical solution This means that each specific pixel does not point necessarily at the same place on the sky To compare two images pixel by pixel it is often needed to resample one of the two with respect to the other called reference image Basically Aladin will go through all the pixel locations in the reference image deduce its coordinates on the sky and by using the astrometrical solution from the second image at
55. containing the script commands The script commands may also be issued to Aladin via another program The various ways of using script commands Script commands may be used in various different contexts oe An alternative to using the mouse To control Aladin remotely using another program via oe gt Standard input a shell script or other scripting languages like perl gt the execCommand String method so that another application sharing the same java virtual machine JVM can interact with Aladin see http aladin u strasbg fr java FAQ htx Launch gt the execAsyncCommand String method to control aladin in applet mode using JavaScript How to launch an Aladin applet To write macros ee oe Example script Example Download an image from a URL add a SIMBAD plane activate the display of a coordinate grid and specify a colour table BB for the display get File http monServeur monImage fits sync get Simbad grid on cm bb noreverse The list of Aladin script commands Help on the script commands may be obtained via the Help gt Help on script commands menu item This displays the online help in the main Aladin window Each script command may be clicked to provide an explanation of the command and the input parameters Aladin script commands PLANE VIEW get servers target radius mvien 1121419116 n load filename cview x w sele
56. crolling list at the end of the query parameters 2 La base extragalactique NED Indiquez une position et la taille du champ puis appuyez sur CHERCHER eT nerrnercersrcrrrcarereuree 05 34 31 97 22 0052 1 MED Filter no Filter MED Filter ED Filter colorized A dedicated filter if activated does not appear in the stack and applies only to specific the catalog plane It prevents any other generic filter to be implemented on this plane The selection or activation of a dedicated filter can be modified afterwards through the properties associated to the plane menu Edit lt Properties Using the button This filter on the stack for edition it is also possible to change a dedicated filter in order to modify and or apply it to several catalog planes aucun Filtre Filtres d di s NED Filter Q MED filter colorized This Filter on the stack for editing Examples of generic filters Circles as a l function of draw circle phot mag magnitude k F draw ellipse ee es Location Ellipses 0 45 5 phys ang5ize sma Akisl tae 0 5 S phys angSize sminAxis Default display pos posAng t draw ey gt oe a S phot mag lt 17 Blue squares for draw blue square bright sources j e stc class Star Different colour draw red square Sletc cleass Radio gt bols draw blue rhomb depending onthe sisrc class Galaxy object type S src class
57. ct xI Mass Select VL F i set xl x2 prop value zoom 4 1 1 64x 64xXx hide show xl x2 lock unlock vl v2 wy copy xl xe Stick unstick Y1 VZ2 rm xl x2 all mr copy vl ve export Eit x filename ru vl vz lock save fmt 1 WxH filename IMAGE coord object cm x1 v1 colorMap RGB RGBdiff x1 wl CATALOG blink mosaic xl x2 CLICS cud 1 Z sa addcol norm cut x match xl x2 dist Cony X 252 cplane name resamp Xl Me thumbnail npix radius crop xlv Y WxH search fexpr Clipflop xlv VIH tag untag contour nn nosmooth zoom select tag GRAPHIC TOUL FOLDER draw fctiparam md localscope name grid on off my rm name reticle on ote collapselexpand name scale onlott ahow hide name MISCELLANEOUS backup filename statuz sync hist n demo onlotflend timeout nn l ott trace Lem pause nn info msg setconf prop value reset quit help Using the planes of the stack as variables In the context of a script it is possible to use the planes of the stack as variables The planes may be referred to by name or by their position in the stack Also script commands may create new planes of the stack PlaneName commande To refer to the planes by position in the stack PlaneName may be replaced by nnn where nnn is the the number of the plane 1 being the lowest plane in the stack If
58. delete tool is highly dependant on the context Depending on the element s selected with the mouse it will delete one of the following The graphical addition s The view s e The plane s Furthermore by pressing simultaneously the Maj key all the data loaded in Aladin will be deleted Use with care there is no undo function in Aladin The other tools accessible via the tool bar are detailed in the other sections of the document 5 1 4 The zoom panel The zoom panel is located on the bottom right of the main window It displays an illustration of the total image on which is superimposed a translucent blue rectangle This rectangle traces the part of the image that is shown in the 5 view with respect to the global image It enables the user to find e his way around the global image The rectangle can be moved around with the mouse The view changes automatically to show the corresponding image portion If the visible region is completely out of the image a red arrow will show the corresponding direction AT 14 16 14 16 ci h The overlaid pret gives the angular size of the global image The current zoom factor can be modified easily by scrolling the mouse In order to centre the view at the maximum size one can click the zoom panel while keeping the Ctrl key pressed 5 1 5 Locating band On top of the main window below the menu two fields display the current location and the
59. e measure panel To do so you need to choose the sub menu Pick when you click on Columns or UCDs Physical units Indicating physical units e g arcmin Jy in the test enables you to get rid of the manual conversion for expressions using columns in which values are not expressed in the same unit Units can be made as shown in the following example This is a powerful example to describe generic filters Example Drawing a circle proportional to the X flux UCD phot flux em X ray for all sources for which the energy level is higher than the given threshold S phot flux em X ray gt 10 8 erg m 2 s draw circle phot flux em X ray Modifying a filter To find again a filter editing window you need to select the corresponding filter in the stack and show its properties with the menu Edit lt Properties Extending the implementation of a filter To be implemented a filter has to be activated with the check close a x to its logo in the stack By default a filter is applied to all the filtre catalogs planes that are below in the Aladin stack However if a Simbad filter is located in a directory in the stack it will only be implemented to the catalog planes belonging to this directory Filter dedicated to a single specific catalog plane Some servers offer a list of filters dedicated to their data Simbad NED Skybot They appear in the data query form c f 5 2 Server Selector as a s
60. e most of the world wide astronomical centres that distribute data on the internet Please note that some data are distributed by several institutes and it is possible to access them via different servers e g the DSS is distributed by 3 servers The servers list is described in details in the Aladin FAQ at the following address http aladin u strasbg fr java FAQ html data 5 2 2 Specifying information Most of forms need at least two mandatory informations in order to query the sky by cone search a target and a radius Giving the target The target can be either the identifier of an astronomical object recognized by the Sesame process query in SIMBAD NED some large catalogs either astronomical coordinates in sexagesimal format in the J2000 referential Some examples M1 NGC2045 Galactic centre 2 31 59 89 15 54 12 39 48 10 2725625020 Giving a radius The query radius corresponds to the radius of the cone search on the sky This value can be followed by a unit or deg arcmin arcsec The default unit is the arc minute It is also possible to indicate a rectangular zone by using the following syntax W x H where W is the width of the rectangle in right ascension and H is the height of the rectangle in declination Both values can be followed by a unit In the case where the queried server only receive cone search on the contrary to a rectangle Aladin will always choose a region large
61. e second mostly used window in Aladin the server selector 5 2 The server selector Icon gt Menu File gt Open File gt Load Short key Ctrl O The server selector window lets you know and query the different astronomical databases that can be accessed with Aladin It can be opened either with the button on the top left or by one of the data loading menus menu File This window is seen as several query forms that can be selected with tabs Tabs on the left of the window are related to images servers tabs on the right to tables data servers including astronomical catalogs and observations lists from telescopes logs Finally tabs on the top are linked to special forms that will be detailed at the end of this section S lecteur de serveurs A File lt aro Crov tor Serveurs 2 Serveur d images Aladin Serveurs d images de tables gt gt gt Etape 1 Indiquez une position et appuyez CHERCHER p All i YizieR DP Surveys 9 par liste ou ar r lt Format d image par d faut JPEG FITS Tabs and forms can evolve with time and with new possibilities coming in the astronomical community Each time it starts Aladin accesses a yellow pages mechanism for the astronomical services in order to be up to date It then adds or modifies the respective tabs when changes are detected cf technical details on the cache 8 4 2 5 2 1 Servers list You will find ther
62. eha characterized by a large pixel dynamic RE denia and sometimes abnormal values detectors bordures saturation HHH unknown values However the monochrome or false colours visual output can only take 256 values on the current computers Hence Aladin performs a resampling of pixels in order to apply a threshold all the pixel values that are below the low threshold value will be displayed in white while all the one above the high threshold value will be black and S intermediate values will be converted Contraste Log sat Linear CO Powe to values between O and 255 in a linear way The autocut algorithm Table des couleurs PEK gives a good contrast on interesting pixels most of the time Dynamique des pixels Intervalle d orig 0 0 25057 0 R cup rer tout Seuils limites 3387 6 123427 7 _ Utiliser le seuillage automatique The 256 pixel values can be displayed either with grey levels in positive or negative or with a colour table that will make a correspondence between each pixel value and a specific colour It is however possible that interesting pixels are not those of your interest or that the autocut algorithm is not well suited for the characteristics of the images you wish to display To adjust manually the pixels dynamics you can use the Image lt pixel contrast menu or the pixel more directly accessible in the tools bar The pixel dynamic window show
63. enough to cover the designated field enclosing circle on the contrary to a enclosing rectangle Some examples 14 9 14 2Varcmin 10 x Le 1 O Automatic selection In the current form the target and radius are automatically written as a function of the previously loaded data in order to cover the same region on the sky It is also possible to select explicitly a region on the sky from a loaded image by using the grab button that appears after the location selection field Doing so Aladin will ask you to select the region by click drag and drop in the view When switching from one form to the other via the tabs the values indicated in the first form will be kept in the second one 5 2 3 Data list and data tree Some servers need two steps to load the data first you need to indicate the region on the sky then you select among the available images or catalogs those of which you would like to load During the second step Aladin displays the available data as a list or a table This list table has several functionalities By moving the mouse on an element the corresponding field of view will be displayed in the main window Faden O 348M901JEQ J6M9017J90Q _ UzZ0Q0POZ2B the columns 2 Canadian Astronomical Data Center CADC 7 POSS renee LE 1649 47 414 24 58 4 Coleco CADET Ad CELE collect FE EN Z DEAD JE x JE Z HEAD lL 4 x 1 4 Z DEAD ZA 1 4 x 1 4 Z DEAD ZA
64. errors In this case you can give the date manually Furthermore it is possible to give in the target field the name of an asteroid or a comet so that SkyBot replaces it by its celestial position on the mentioned date To do so it is mandatory to press the button Get coord For this object epoc 5 2 10Adding a personal server The server selector window can be adapted to your own servers It is then possible to define a personal server that will add a tab and a form To do so you need to create a small file that will contain information like the name the description the web address some parameters and then restart Aladin by indicating on the command line the file name java jar Aladin jar glufile yourFile Example of description file ActionName MyServer SAladin Label Test Description This is an example of a server URL http my web site my base query yy 1 amp xx 2 Param Description 1 Parameter 1 Param Description S2 Parameter 2 ResultDataType Mime image fits The full syntax is described in the Aladin FAQ http aladin u strasbg fr java FAQ html Glu Now that we described the two main windows of Aladin in detail we will now present the different additional windows 5 3 Adjusting the pixels dynamic Button pixel pixel Menu Image gt Pixels contrast Short key Ctrl M Aladin is implementing an algorithm that renders best the astronomical gt images contrast They are often a o sn
65. et 4 The easiest way for loading an image in Aladin is to use the menu File Load astronomical image DSS DSS from ESO Emma and to specify a name or an object position in the form that appears In our example M51 S lecteur de serveurs f Ef And then Just press the aures Pee Cato Crov EE SUBMIT button de Lies The form opened in the previous All Cae step displays the data server that The Digitized Sky Survey from ESO Garching z er Aladin can access The image pl payers e bar CHER EFE qu server appears on the left side In es ardis fact the previous step has pre Sky Survey 552 184 POGSAUKSTU Ped AA selected the corresponding form WAND AP CHIT rennes 15 mee here DSS from ESO On the Brose cama right side appear the tabular data servers SIMBAD NED and gers most of astronomical catalogues via VizieR rave etfecer Aide cmncren Fermer Thus for loading Simbad data you have to click on the Simbad tab and without changing the parameter value in the form fields identical to the previous position press the SEARCH button again Notice that for a catalogue you have to write its name in the VizieR form before submitting the request In our example as NOMAD is a large survey you can directly select it in the Surveys tab by clicking on the corresponding line After that you must press the SEARCH butt
66. formances and capabilities f Aladin ay at les Windews lateral Explore E fA px G re hold dro derrotada pl te H E For Em Alien Premio Caila SCF A bh D O ain hy aha Mir El db lire C Quia A E a pros L 47 Z CD Par amp E 5 4 All ih ri Babe Tobra a Hh ud Cud Dictionary Developers LH Aladin shy atlas as Fle Et mep Cotelog Ce Tod Hala red G Gi Location 82 20 50 63 47 84 4G 7 jens Ped s n n pn R TM _ E Al rra I Hi G 3 Getting started To give you a brief overview of the Aladin potential here s a typical scenario for visualizing images and catalogues around an astronomical object Launching Aladin Searching for an optical image of M51 Searching SIMBAD around this object Loading NOMAD catalogue around this object Visualizing data panning zooming Browsing measurement and accessing original record Saving MATESI F Let s go through this scenario step by step ex MT ou 13 29 59 47 11 48 launch the application via a command line Launching Aladin 1 How to launch of Aladin depends on the ES type of hardware you have On Windows and Macintosh double click a the icon Aladin for starting the Biter here application With Linux and other Unix A stations it will probably be necessary to A Java ar Aladin jar ladn est d amp bloom par Aere FEMME Thomas Bodh et Fran os Bora 5 BOC et F fran d Ci ULFAMRE 1599 2008 Data loading 2 3
67. g planes to other applications Selecting Planes Selecting a plane in a stack is done by clicking on the name of the plane compared to activating a plane which is done by the clicking the plane logo or the tick box Selected planes are indicated by bright blue highlighting Multiple planes may be selected by pressing the CTRL key while making the selections or by using the Shift key to select consecutive planes when planes are selected certain items of the contectual and main menus will be active or non active depending on the nature of those planes For example the contour task will be active when an image is selected but not active for a catalogue Plane Properties Bouton prop 2 Menu Edition gt Propri t s Raccourci Ctrl Entr e The prop button brings up a window with properties of a plane This is also available from the main menu Edit gt Properties and from the contectual menu in the stack The propeties window lists the name of the plane and the origin of the data and other properties dependent on the nature of the plane Certain properties may be altered in this window For example the plaotting symbols and colour of catalogue planes the window also shows the web address used by aladin to obtain the data MES shown Propri t s du plan Simbad endo gt tad o ABB MAA m M Controlling the transparency Of romepard faut romo y planes objet 70 Origine Fournit par la base astronomique
68. ges FITS HR ee FITS Sa uniquement Pr d cesseur de VOTable ee Catalogue support pour compatibilit Standard IVOA totalement VOTABLE Catalogue support base64 FITS lt 1 million de sources Table FITS en ASCII oP Catalogue Zn lt 1 million de sources FITS SB Catalogue Table FITS en binaire Sur la base d une machine disposant d 1Gigaoctets de RAM lt 1 million de sources Character separated value CSV 8 TSV Catalogue EEE onde ce Blank separated value Rex Catalogue Z lt 1 million de sources Format par d faut de S SEXTRACTOR Catalogue S MFITS Donn es multiples fo FITS multiples extensions AJ Pile Aladin m NG Sauvegarde de la pile AJS Script Aladin Fichier de commandes scripts Description de champs de vue FOV Champ de vue instrumental note IVOA IDHA e aces H rs Concurrent de SIA support 5 pour compatibilit SIA Liste d images WCS Ha rs Standard A lt 10 000 lignes SSA Liste de spectres Ha rs eue 2A lt 10 000 lignes GZIP Compression Applicable sur tous les autres formats Aladin reconna t automatiquement la nature des donn es en se basant sur le contenu l extension du nom de fichier ou la pr sence d un Content type pour un flux http n ont pas d incidence sur la reconnaissance du fichier Exception Le format AJS script Aladin est une exception car sa nature ne peut tre reconnu de fa on automatique sans risque de confusion Pour lever l ambiguit Aladin se
69. gging the catalogue plane into a view window Image planes of the same field may be compared in various ways One image may be overlaid on another with a controlled level of transparency see section Alternatively a colour composite of the two or three image may be constructed and multiple images may be directly compared by creating blink planes D S J POSSII eE Dessin 3 A sima e 55 DSS2 1POSSI Hi E p Ea A E La 8 52 9 93 T pinta 8 85 x 7 38 E T It is possible to load the stack with images and catalogues that do not fall in the same part of the sky Using a single view window it is possible to switch between different fields by clicking on the relevant image planes Also using multiple view windows will allow simultaneous viewing of different fields Heirarchical structure of the stack GC 1055 Simbad 1 DSS2 F POSSI H The stack may be organised into a multiple level structure by the use of folders Folders may be created using the main menu item Edit gt Create a Stack Folder and Edit gt Insert in a New Stack Folder These tasks may also be accessed by right clicking or CTRL click in the stack Contextual Menu The stack has a contextual menu that may be accessed by using a right click or CTRL click This menu collects the tasks related specifically to stack planes such as selecting all the objects in a plane deleting planes creating folders and also broadcastin
70. has an astrometrical calibration zooming in will centre the image on the current reticule location unless the view was locked c f below It is therefore very simple to zoom in on a particular object by moving the reticule onto the given object simple click and then using the mouse scroller Coordinates grid EL Icon grid sil Menu Overlay gt Grid Short key Alt G Activating a grid can be done either with the grid icon located below the view or using the menu Overlay lt Grid The grid step depends on the current zoom factor in order to only display a reasonable number of sectors The grid referential is the same as the one used to display the current location with the mouse It is not possible to display simultaneously different grids corresponding to different referentials If the zoom factor is very small 1 512x the grid can seem truncated if the astrometrical solution of the current image is inaccurate to compute a location far off the image e g digitized Schmidt plate Target arrow Menu Overlay gt Target Arrow Short key Alt T When an image was queried either by location or by object name c f 5 2 server selector a small red arrow gives the location in the image This arrow can be deleted using the menu item Overlay lt Target Arrow Multi view In order to compare more easily several images it can be useful to create several view simultaneously Le main panel can then be divided i
71. he script parameter in the URL that calls the applet or as an input to a JavaScript method The script parameter The URL dused to call the applet accepts a parameter of the form script xxxx where xxx is an Aladin script The script may consist of multiple commands separated by a semi colon The script is executed immediately after the applet is launched and permits loading of data for visualisation Example Start the applet with data from a specified file and overlay a coordinate grid http nph aladin pl script get File http xxx grid on Hint The Aladin web pages provide a formula to assist the generation of well formed URLs for calling the applet with various functons See http aladin u strasbg fr java nph aladin pl frame form Using JavaScript Aladin in applet mode may also be controlled via a JavaScript function with the following reference document aladin execAsyncCommand script In contrast to the pervious method the use of the script parameter with JavaScript allows modification of the behaviour of the Aladin applet Itis not neccessary to restart Aladin for each new data set to be visualised For more information about controlling Aladin via JavaScript refer to the FAQ http aladin u strasbg fr java FAQ htx JavaScript And for more general information on how to provide your data Aladin see http aladin u strasbg fr java HowToProvideMyData htx
72. he projection of certain catalogue planes to particular images This may be done by placing the catalogue plane in the same folder as the image over which it should be projected and then in the properties window for the folder select whether the projection of the enclosed catalogue planes should be local restricted to images in that folder or global to project on all images beneath it in the stack 0551 E POS TO AMATS MAOA pytt 14 03 12 51 5 NED 2MASS H 990 7 dh Simbad AA DSS1 E POSSI A hi a 1 et a 4 ufa Lane 4 Hi Li ait 4 fet an a ES E gt i A r ls 4 a Taw ak E y H d C Em Y h Rak 5 1 2 The view The viewing panel is the main component of the Aladin interface The view shows a display of the data activated in the stack Most of the time it is an image onto which graphical symbols are overdrawn to represent the sources from catalogs Additional information is displayed at the bordures scale size of the field of view on the sky as well as its angle with respect to the north Object location In order to trace astronomical objects to their precise location Aladin is based on the astronomical solution linked to the image e g a centralized tangential projection Most of the time images are given with an astronomical solution this is the case in
73. he measure tables in Aladin can easily load several hundred thousands lines Re integrating the measure window to its initial location is simply done by clicking again on this same logo or by closing the window Sources selection Selecting sources can be done either with the menus with the mouse or with a query expression Selection with menus Menu Edit gt Select Short key Ctrl A all objects The Edit menu has a sub menu that enables you to select all sources i e all the sources existing in the catalogs planes loaded in the stack It is also possible to select only the sources from one or the other plane through the menu Edit select all objects in the selected planes On would have to select beforehand the aforementioned planes in the stack cf Selection with the mouse The selection with the mouse is the mostly used method It enables you to choose sources given their locations in the view In order to select a source one has to click on it in the view To select several sources it is mandatory to include them with a selection rectangle To do so one has to click on a no source region slightly above on the left of the first source to select and then by holding the mouse button expand the selection by moving the mouse pointer to the bottom right During this operation a rectangle shows in the view the selected zone Once you release the mouse button all sources inside the rectangle will b selected
74. he used syntax is UCD Jokers characters et are authorized For example phot corresponds to the first column having a UCD that starts with phot that is the first column having magnitude measures In summary referencing a column with its name is called with brackets while referencing a column with its UCD is called with brackets Example Drawing a circle proportional to the magnitude for all sources brighter than 12 phot lt 12 draw circle phot In order to simplify references to columns the edit board for filters offers two buttons Columns and UCDs that enable you to choose in a list the column name or the UCD respectively so that the corresponding text will be automatically written at the cursor s location in the edition window DEG PMOEG IL Y IL ar rre ALCA ALS LOIN NIE GALON AKL DELSI MASS Pain Demo masss mu mag ata Ja Big Cas phot Photometry UCD dans les catalogues pr sents H Phot mag Photometric magniti phot mag em opt Photometric Pointer un UCD Le pos eq ra meta main Right asci pos eq dec meta main Declinat src class Source classification meta code Code or flag meta idimeta main Identifier n meta number Number of thing If sources are selected in the view and hence their measured are displayed it is possible to select a column by a simple click on it in th
75. ible in the zoom frame Centring on a particular object The view centre displays a 14 97 x 15 0 reticule the magenta cross The easiest way for pointing on a particular object is to set the reticule on this object by clicking on it then zooming by using the mouse wheel The view will be automatically centred on this object e Measurements and original record access 6 The view can display graphical objects associated to astronomical catalogs or tables in overlay of the background image in this case SIMBAD and NOMAD Each of these objects can be selected via a mouse selection direct click on a object or mouse box selection The selected objects appear surrounded by with a small green square The associated measurements are displayed as a table in the measurement frame Some values are underlined in blue as a Web link MAIN ID OTYPE RA DEC COO COO C PMRA L ac 47 364 mea el AS eae Sie 47 11 40 5 10650 1080 90 O 152002 6 Star Laa al 47 11 39 2 DL CPF88 152746 2 472 Maser 13 29 52 5 47 11 de O LPS lt 002 15 tAr la e6 88 8 47 11 42 5 LPSZOOZ 14 Star la 298 52 27 47 11 43 7 lt il By clicking on a link Aladin opens your browser and displays additional information The first link is usually used to display the full original record SIMA query Ment Wedman a Explorer E IB X vts lines rato abad ll idad 7 Sb dent e Ds Feber Edition Aihe Fur
76. ier de pile Ins rer les plans s lectionn s dans un nouveau dossier Envoie ces plans toutes les applications PLASTIC Envoie les tables s lectionn es 4 toutes les applications PLASTIC topcat Propri t s WOP lot Interactions Generally when the data are tables or catalogues the sources selected in one of the applications are automatically selected in the other application It is a very practical method for example to show the distribution of source selected say in a colour colour diagram in VOPlot on the sky Pichi Edin rag Calam Graphi Qu Vu Ada E Pasilian 205054147 Hitri di kmag magi muy r Lil US o FA oe Ne an si 1 Pis SAN r O 312 527176 444 422352 20503052 14 952 0 043 LLa 0 02 9 7589 IL 312751221 44 546500 20510039 115 912 0 556 10 560 19 972 O 342 467 0793 444 290131 20455796 113 429 0 056 11 605 10 357 IL DEE 44 70 3 205046576 19 47 14 956 0 089 13 711 342 6 74653 444 307133 20504191 19 424 14 920 0 096 13 263 Note The PLASTIC actions are dependent on the applications and it is possible that a selection of an object is simply ignored by a PLASTIC compatibel application Indeed some applications allow for configuration of the PLASTIC interoperability behaviours 6 4 Extraction of sources via SExtractor Menu Tools gt Remote Tools gt S extractor Aladin does not natively include too
77. interact it is usually sufficient to simply have both applications running simultaneously Aladin also provides the possibility of launching those tools from the Tools gt VO tools menu When two applications are connected it is usually indicated within the applications Some applications make use of an Interop menu item TOPCAT VOPlot VOSpec and some application connections are shown by a small icon Aladin Virgo in the window of the application to which it is connected Aladin indicates the PLASTIC connections via an antenna icon at the bottom right of the main Aladin window When a connection with Plastic compatible applications is available the icon shows this active state with wavefronts in the icon E p Via the icon it is possible to access a contectual menu for controlling various PLASTIC parameters for the transmission of data Se connecter 4 PLASTIC Se d connecter de PLASTIC Envoyer les plans s lectionn s Pr f rences PLASTIC Transfer of Data Once Aladin is connected to another application it is possible to send and receive data images tables and to create new entries in the stack To send data select the relevant planes in the stack and open a contextual menu right click or CTRL click then indicate the target applications you wish to send the data to Cacher S lectionner tous les objets des plans s lectionn es Supprimer Supprimer tous les plans Cr er un nouveau doss
78. is a shortcut to get all the image dynamics back Intervalle d orig 0 3537 43 665 Seuils limites 0 0279 0 0279 0279 0 0556 gt 0556 0 0556 Utiliser le seuillage automatique Modifying the initial threshold treatment is a long process a few seconds proportionally to the image size while a simple contrast change by modifying the contrast function is almost instantaneous Specific images specific cases If dealing with real colour images or with a data cube the window is adapted to the data type Colour Image Aladin can deal with real colour images coloured compositions cf 5 9 JPEG GIF PNG or colour FITS images In such a case there is not automatic threshold and the dynamic control window shows 3 histograms one on top of the other with control slides corresponding to the distribution of pixel values in the 3 red green blue components Each component has its 3 control cursors as for a usual image Holding the Maj key while moving the cursor will synchronize the 2 other colour components in order to do a simultaneous adjustment on the 3 components L tes de cane ees y de rs de ce tracarnar Piira Parra 7 Image data cubes Aladin can let you manipulate image data cubes cf 5 10 image associations or FITS cubes In this case the histogram of the pixels distribution is related only to the currently displayed image If the display is currently going thr
79. ladin Persian 4 9 string utr 72 Ko Fichier UTF Aladin conf La configuration Le fichier Aladin conf m morise vos pr f rences La disparition de ce fichier r tablit les valeurs par d faut Aladin xxxx string Les langues Le fichier Aladin xxxx string contient la derni re traduction utilis e hors anglais et francals Ce fichier sera remplac par une nouvelle traduction le cas ch ant Les fichiers dont le nom finit par la sous chaine perso contiennent vos traductions personnelles ils ne sont jamais effac s par Aladin Cache pour les informations g n rales Les informations g n rales dont Aladin a besoin pour connaitre les diff rents serveurs de donn es disponibles sont stock es dans le sous r pertoire Cache Elles servent notamment a la cr ation de la fen tre du s lecteur de serveurs cf 5 2 Ces fichiers seront utilis s tels que pour ne pas ralentir le d marrage de la prochaine session Le cas ch ant ils seront mis jour quelques secondes apr s le d marrage de la session Aladin Le nom des fichiers est bas sur URL qui a fourni l information mais dont certains caract res ont d tre encod s pour tre accept s en tant que nom de fichier La suppression manuelle de ces fichiers ralentira simplement le d marrage de la prochaine session Plugins pour les plugins Le sous r pertoire Plugins contient toutes les extensions java apport es
80. laying and manipulating the data The server selector for locating and accessing the astronomical data locally or via Internet Several other wndows allow various controls including The pixel range control contrast The contour generator The catalog filter editor The catalog cross correlation The catalog column computing The astrometrical calibration controller The image resampling controller The arithmetic operations on image pixel values The saving controller The user preferences configuration The console for using the script mode ey e e e e e e e e e We will now review the various interface elements their role Note It is possible to start Aladin in students mode undergraduate or in simple display mode preview in order to adapt the Aladin interface to the user profile These two modes will be studied later 5 1 The main window Aladin combines in a single window most of the components required for displaying and manipulating data a menu bar a location box the view panel the zoom panel the stack and a panel for the measurements Aladin v5 0 MIE Fichier Edition Image Catalogue Graphique Outil Vue Aide T j N ae Al 14 03 x 14 17 grille tad AA MAIN ID TYPE a DEC PR Ll fercosy TEZ Part 2706187083
81. ld work with out problems of this kind 6 5Generating thumbnail images Menu Image gt Thumbnail generator Aladin provides a way of easily generating thumbnail images for a list of objects that is a set of small images cut out from a larger image in the stack centred on all of the objects in a list The list may be defined by a selection of objects in a catalogue plane of the stack or as a set of interactively tagged objects Aladin will generate as many views see 5 1 2 as there are objects in the list Example Suppose you wish to create thumbnail images of all the objects that may be planetary nebulae in the central region of the field of the comas cluster pe LES Simbad Load a DSS of the field and overlay a Simbad 53 DSS2 0 P0SSI plane Select sources that are indicated as possible Planetary Nebulaeby using the search box in the lower right of the main wondow Simply type PN in the text box and press GO This selects all sources indicated as PN in the Simbad plane Creat thumbnail images of all these sources via the Image gt Thumbnail view generator menu item The generated thumbnail views are automatically locked which means that they do not zoom or pan in concert with other views this is indicated by the small padlock symbol in the lower left of each thumnail view see 5 1 2 locked views Hint Thumnail views may be deleted individually as for any view and also a
82. ll of the locked views may be deleted at one time both these options are available by right clicking on a view Hint When scrolling though the many views that may be generated by the above procedure it is often useful to stick the full field view so that it remains visible as the thumnail views are scrolled Thumbnail views of multiple images Thumbnails may be generated simultaneously for a number of bands and be displayed side by side For example to compare the thumbnail images for a set of sources in two images first select the views of the two images then select the desired sources and generate the thumbnails with Image gt thumbnail view generator The resulting thumbnails will be arranged so that the thumbnails from the two images are shown side by side The multi view options can be altered to facilitate the comparison in this case the 2x1 and 2x2 views are convenient A agd DRS z 7 Aladin for experts In this section we briefly outline some of the advanced features of Aladin These include e How to use Aladin in script mode How to use aladin as an applet Extending the capabilities by developing java plugins for Aladin How to use IDL with Aladin e e e 7 1 Aladin script mode As an alternative to the graphical interface Aladin may be controlled by contextual commands The commands may be entered interactively at the command line or be uploaded via a file
83. ls for photometry rather it provides a mechanism to call Sextractor which is designed for source extraction including calculation of magnitudes of the sources Bertin amp Arnouts 1996 The Tools gt Remote Tools gt Sextractor menu opens the Server Selector window with a number of Sextractor options This includes selection of the reference image which should be used and various filters to be applied to the output when displaying the results for example to display circles around in source with radii in proportion to their brightness S extractor facility v2 5 0 Renseignez tous les champs puis appuyez sur le bouton CHERCHER Image reference Threshold x RMS Mag Zero point ra O stolar ra cst Filtre d affichage Object elongation Once the options are selected and the submit button is pressed the Sextractor remote tool which is an installation of Sextractor on a cluster of compueters in Strasbourg will execute the calculation and send the result back and it appears as a new plane in the stack and shows the result overlaid on the image Note If the image is local stored on your disk it may be neccesary to authorize the remote application to temporarily use a particular network port of your machine so that it may access the image There may also be further complications with your network provider when using loal images in this way Using images on external servers however shou
84. mands cf Convolution Furthermore the menu Image lt Convolution lets you convolve the current image with a specific array 1 e to compute a new image according to the product of each pixel from the original image and their neighbours with a specific array The sub menu gives the array usually used in astronomy Gauss Mex TopHat with different sizes You can also define you own convolution matrix by using the script command conv cf The resulting image will replace the original one in the stack If you wish to keep the original image you need to duplicate it beforehand menu Image lt Duplicate the image plane 5 13Save export and print Icon E Menu File gt Save File gt Export File gt Backup File gt Print Short key Ctrl S Ctrl P By using the icon on the top left corner below the menu band representing a floppy disk you can Enregistre Ctrl 5 Enregistrer la vue courante 7 EMP Exporter la vue courante EPS JPEG h ee Exporter des plans FITS VO Table PAG ie the ae an OW Sauvegarder la pile PMG LIMNK ou an also use the different possibilities from the file menu to get directly the desired action Aladin has several possibilities to save your work Printing the view s Save the current view The supported formats are BMP JPEG PNG and EPS This last format is especially preferred for a scientific p
85. n 2 4 9 or 16 sub panels Each of these panels can display a different image and superposed graphical additions These images can sample different regions of the sky or the same one It is also possible to use different panels for a single image for example in order to visualise different details in this image Number of views Oo e a 1 J 1 Icon multiview multivues Menu Edit gt Multiview Short key F1 Maj F2 F2 F3 F4 Modifying the number of visible views can be done either with the multiview selector located at the bottom left of the view panel or with the menu Edit lt 1 2 4 9 or 16 panels If the views that are used are more numerous than the number of available panels then a sliding bar appears on the left of the main window and enables you to access the other views Up to several thousands of view can be created cf thumbnails creations Only the views that are visible make use of random access memory RAM 2 23433 912448 i FOSSIE D S 15 20551 P 00532 474 s mi 4 FOSE LD 174 F 04311 M4 0552 175 c UAE E H Send HIH f 4 2455 HAS 14H HI ARE RIS 7864 IRES Allocations of the views The allocation of an image to a view is done by drag and drop of the respective plane logo onto the selected panel It is also possible to create as many views as there are images in the stack by using the menu View lt Create one view per image Trick It is possible to drag and drop a JPEG PN
86. n band are continuously modified following the movements of the mouse However a click with the mouse in the view will save the current values location pixel and these values will appear for a short moment in magenta These values will be saved in the Location and Pixel fields and will be displayed again by entering the corresponding field with the mouse Doing so they can be paste in the clipboard in order to be paste in another application Position 05 34 21 40 22 03 14 8 Giving the location the name of an object Menu Tool gt Object name resolver Short key Ctrl R It is possible to give a location directly in the Location field The referential used should then correspond to the one specified J2000 B1950d XYimage When validating with Enter the location that was typed the reticule magenta cross will move to the corresponding location in the view and the view will be centred on this location This location can eventually be off the image It is also possible to type astronomical object identification In this case the validation key Enter will lead first to an automatic query of the CDS Sesame service which will glve back the best known location for the object by looking into the SIMBAD or NED data base and some large astronomical catalogs in Vizier Then using the coordinates obtained Aladin will move the reticule and centre the view on the location This function is also accessible vi
87. n be surrounded by two vertical bars to indicate the absolute value There is no case distinction capital keys or not both for the column name and for its value Comment for convenience sake searching with a simple text chain without any particular column indications is always considered as a sub chain search For example the gal research will in fact be gal Some examples Star sources which measures contain the star word otype uv sources which column otype has the value uv mag gt 12 first column in which the name starts with mag the numerical value should be larger or equal to 12 pm lt 5 same as above byt only the absolute value is taken into account type g column type in which values that do not start with the g letter bmag column bmag that is not empty Unselecting Menu Edit gt Unselect objects Short key Ctrl U To unselect a source from a previous selection click on the corresponding source while holding the Maj key To unselect all sources i e empty the measures table one has to click in the view anywhere outside a source or use the menu Edit lt unselect all sources Trick In order to avoid loosing accidentally a selection you can click the sources in the table so that you can re select them afterwards cf section below Counters The number of selected sources i e the one for which sources are dis
88. n one click This tab lets you query all the Exploration de rObservatoire virtue F servers known by Aladin not roses 12 1840404142 only the one shown on the right and left part of the window but all the other PE Le PEA DBS par de in pd oir NS in ed Le prear drogas Mad Dira DOS PLUME PEE TRAS ik servers described in the z E 5033 0 raga o yellow pages of the Virtual 2 EE Valen ares a STSI MEST on Observatory The form can be 4 E Came iront a ones CAC o used to restrain the query to RENE En ho rasah images servers and or sais cr VD Ds ETE ZE 1 4 x 1 4 E 1 4 catalogs servers and or spectral ones The Detailed list button can be used to 2 tune your choice by selecting We rea or deselecting manually pe ret servers The result is ho resah summarized with a data tree o format Fee FOV The instrumental fields This form lets you access a list of instrumental field of view FoV descriptions from a large number of telescopes These fields will be superimposed on images in order to prepare for an observing mission for example They can eventually be displaced or turned thanks to a selection with the mouse 051 6 P Cira ji j mF Ea Din al urs ne a iiiu i It is possible to define your own instruments field of view with an XML file You will find the syntax description at the following address http aladin u stra
89. nct curves one for the red one for the green and one for the blue If you move the mouse pointer on the histogram the pixel values is displayed in abscissa as well as the corresponding red green and blue values in ordinates on the right hand side of the histogram Simultaneously the final colour is shown in the above strip D OS 216 oo A il 33867 6 ree 14 23427 7 3387 65 re eater Transfer functions By default Aladin uses a linear function to relate the pixel value gt entry for the colour table The three cursors below the histogram let you change the slope of this function or even to use two slopes one corresponding to the 128 lowest values in the colour table the other corresponding to the 128 highest values Basically moving the right and left cursors changes the lower and upper thresholds while the central cursor when moved to the left will enhance the contrast and reduce the contrast when moved to the right If the Ctrl key resp Apple for Mac is hold the central cursor becomes a diamond and is also sensitive to the vertical moves with the mouse MA This will lead to reduce or enlarge the range 7 between the right and left cursors simultaneously It is a quick method to readjust the maximum dynamic on the pixel range to display The control band also lets you choose other non linear functions log sqrt pow2 As indicated below the og function will lead to an image with
90. ndows After downloading it is necessary to click the Apr s les avoir copi s a cet emplacement il est n cessaire de cliquer sur le bouton Re load button Writing Aladin plugins Writing plugins requires a reasonable understanding of the Java language It involved extending the AladinPlugin object class in order to access the methods required for manipulation of the stack and handling of images and catalogues The documentation for creating plugins is available http aladin u strasbg fr java FAQ htx plugins 7 4 Interactions IDL Aladin IDL Interactive Data Language is a language and environment which is often used for image processing with a significant astronomer user community An set of IDL procedures pro files which allow the use of Aladin with the IDL environment are available at http aladin u strasbg fr java idl aladin interface tar gz These allow the use and exchange of images tables colour tables etc between Aladin and IDL For more information on the use of Aladin libraries for IDL see http aladin u strasbg fr java FAQ htx IDL 8 Using Aladin The Aladin software has evolved for more than 10 years a wealth of practical information can be found in the FAQ http aladin u strasbg fr java FAQ htx This document is continually updated as new functions are added there are also numerous tutorials and practical examples on line and is a good ressource for students http aladin u
91. nir une premi re vue en quelques dizaines de secondes quelque soit la taille de l image Cette strat gie en deux niveaux de r solution est plus contraignante temps d attente du chargement des pixels hautes r solutions lors des d placements mais permet de manipuler n importe quelle taille d image tant qu elle peut tre stock e sur un disque dur Gestion des catalogues La manipulation des catalogues se fait par un chargement complet en m moire vive Il faut compter approximativement 300 octets par sources ce qui donne une limite autour de 1 5 million d objets manipulables avec un ordinateur disposant de 1 Gigaoctet de RAM En pratique la limite se situe plut t autour de 1 million d objets afin de laisser de la m moire vive pour les images et pour les applications 8 4 2Le cache d Aladin Pour g rer au mieux les lenteurs inh rentes au r seau et pour conomiser la m moire vive Aladin utilise un r pertoire cache sur votre disque local nomm aladin Il se situe dans votre r pertoire d accueil HOME sous Unix Documents and Settings YourName sous Windows Il est constitu de plusieurs sous r pertoires et de quelques fichiers que nous allons bri vement d crire Mom Taille Type aladdin 64304 Dossier de Fichiers Cache Dossier de fichiers Plugins Dossier de Fichiers VOT ools Dossier de Fichiers a Aladin conf l Ko Fichier CONF l Aladin Elsassich 5 029 perso string 3 Ko Fichier STRING l A
92. nn s Ajouter une nouvelle colonne Cr er un nouveau filtre Filtres pr d finis Dessine des cercles proportionnels 4 la luminosit des objets Affiche uniquement les objets brillants magnitude lt 12 Calibration astrometrique Affiche uniquement les objets faibles magnitude gt 17 Cr e un nouveau plan avec les objets s lectionn s Inscrit les types d objets Trace le mouvements propres des toiles ee ee Source measurement operations selection filtering sorting tagging Graphical symbol drawing according to some source measurement values e g circles proportional to the magnitude arrows based on the proper movements error ellipses e ee ee ee Catalog cross correlation Catalog column generator Catalog astrometrical calibration without sky coordinates Graphical overlays processing functions ey ey VVVVV e ee ee Contour extraction Graphical tools Distance measurement Tag tool Hand drawn tool Free text Cut graph along a segment or in the 3 dimension for cubes Coordinate grid Instrument field of view FoV overlays drawn on a_ background transparency control support Tracer des contours dist Outil de calcul de distance alt D dessin Dessin main lev e marg Positionnement de rep res texte Texte libre Grille Alt G Info A t 0 Fl che de la cible Alt T R ticule classique R ticule la
93. nu appears directly in the panel of measures right click or CTRL click Cocher toutes ces sources D cocher ces sources Garder les sources cochees Garder les sources d coch es The main menu Edit S lectionner les sources cochees Cocher les sources s lectionn es D cocher les sources coch es In the view sources for which the lies of measures are checked appear with a magenta square instead of the usual green one Add compute a new column Aladin gives you the possibility to add a new column of values This operation is described with further details in section 5 7 Export measures Menu Catalog gt Create a new plane with Contextual menu Create a new plane with Measures can be easily paste in the clipboard from the exploitation system in order to paste them to another application The contextual menu gives several possibilities Copier Copier la valeur s lectionn e Copier les coordonn es de l objet Copier les mesures de l objet Copier toutes les mesures pour un diteur de texte Copier toutes les mesures pour Excel It is also possible to generate through the contextual menu a new catalog plane that will hold a copy of the sources measures seen in the measure panel Create a new plane with the selected sources or in the main menu Menu lt Create a new plane with the selected SOUYCES Now that we have reviewed the different components from the main window let s go to th
94. ocation information as well as pixel values are overlaid on the top right corner of the image The usage of the mouse merges the Select mode with the Pan mode cf next section the tool bar Basically it is possible to move the field of view by clicking dragging the image It is also possible to select an object by directly clicking on it One can only select one source at a time Its information measures will then be displayed as an overlay men FF M ES Identifier RA NGC 5457 HK83 140 14 03 23 7 A script command can be el directly i in the view Tt will be displayed in a frame overlaid If the stack is empty a simplified form appears to let you type the name of an object or an astronomical location Trick The mode simple window presents all the basic function from Aladin It can be used by default cf user profiles and in particular if Aladin is used as an applet cf Aladin in a web browser 5 1 3 The tool bar Located vertically in between the stack and the view the tool bar enables a quick access to the most used tools ee select Mode select objects in the view E L Ta elect dessin corr loupe pan Mode moving the view zoom Mode adjusting the zoom factor for the view D T A depl mar nb pixel dist Graphical addition for measuring distances ra Al LT draw Graphical addition for hand drawings zoom texte assoc prop tag Graphical addition to
95. on Data visualization 4 the data visualization uses the main Aladin window This window has 4 components 1 The stack shows all the downloaded data as a stack of planes The user eye is on the top of this stack and sees all activated planes by transparency 2 The zoom shows the image area currently visible blue rectangle according to the factor and the centre of the zoom 3 The view displays the image area currently visible according to the activated stack planes and the zoom and superimposes graphic symbols corresponding to the astronomical objects in loaded catalogues and tables 4 The measurements shows the measurements associated to the objects selected in the view via the mouse magnitude parallax Plane_activation Enabling or disabling a plane is done by clicking on the small checkbox on the left of the plane logo in the stack It is also possible to switch planes via the mouse click and drag to change the foreground plane for a better seeing of the view e g an image on top of the stack hides catalogs below 153 NOMAD1 D Simbad ESO POSSZUAS Zoom setting The fastest way for adjusting the zoom is to use the mouse wheel with the mouse located in the view or in the zoom frame If your mouse does not have a wheel you can use the zoom selector just above the zoom frame Moving in the image For image moving click and drag the blue rectangle vis
96. on will create a duplicate of the view Delete Deleting a view does not imply the deletion of the image and or of the catalogs used for the view the data remain accessible in the stack However deleting an image in the stack does suppress all the views using it The menu View Delete other views enables you to suppress rapidly all views except the current one Full screen and simple window Menu View gt Full screen Simple window Short key F11 F12 A view can be displayed by using the entirety of the screen It can also be displayed in a simple window without the rest of the graphical interface menu stack measures being shown Using the F11 and F12 keys respectively will enable you to switch between these visualisation modes The Escape key will make you go back to the normal display mode Outside the size of the display window both modes are identical The use of Aladin in full screen or simple window mode changes the normal usage in certain ways ey ey ey Manipulation icons are shown on the right hand side They enable you to activate or not catalogs and graphical additions display or not the coordinate grid save the current view in PNG or JPEG if the Maj key is pressed this gives m smaller size files but they are less sharp if there are graphical additions switch to the next field if it exists The Ed icon enables you to go back to normal mode similar to the Esc key L
97. or to H write text are always clickable Choosing one of them leads automatically to the creation of a plane drawing 7 y on top of the stack Graphical elements that will be texte placed with the mouse in the view will be memorized in Ny 4 this plane with celestial coordinates and will therefore ie be visualised on other images Selection and Move Graphical additions created by one of these 4 tools can be selected Select tool and even moved through a click drag with the mouse When they are selected small green handles appear around their limits Technical detail When one or several elements are moved at the same time one should note that the displacement is computed on the celestial coordinates RA DEC only for the object that is underneath the mouse pointer and it is only then propagated to the other selected objects Keeping the Maj key pressed will change this behaviour and only movements in XY coordinates will be considered for all objects Both techniques do not give the same result in particular when the objects to move are distant by more than several degrees or close to the poles Some tricks During a tag tag tool keeping the Maj pressed leads to the computation of a centroid for the pixel values the closest to the clicked location and moves the tag to the location found This enables you to easily put a tag at the centre of a star It is possible to have the lo
98. osition 1 2 39 20 65 26 S I The 3 modes for the view Actions given by the mouse in the view are dependant on the current mode Three modes that are fully exclusives are possible Select for selecting graphical additions including sources from catalogs Pan to move in the field of view Zoom to zoom and un zoom w i zoom By default the Select mode is activated Before trying to do something with the mouse have a look at the tool bar in order to make sure that you are in the right mode Trick By going out of the view with the mouse pointer the default mode Select gets activated again Selecting objects Button select When Aladin displays graphical objects sources from catalogs or graphical additions it is possible to select some of these objects once the Select mode is activated If this is not the case click on the select button on top of the toolbar Object selection is done by clicking on it or by creating a selection rectangle that will encompass the targeted object s click outside an object drag and drop Selected objects are highlighted with a small green square If the selected objects are astronomical sources then the associated measures will appear in the measure panel below the view cf Selected objects if they are graphical additions and not sources from catalogs can be moved around For this one needs to click and slide one of the small
99. ough the cube the histogram will evolve dynamically respectively to the current image All adjusting possibilities of the pixel dynamics are the same as for a single image In the case of large data cubes several hundreds of megabytes modifying operations of the initial threshold can take several seconds before the results gets displayed on all the images of the cube 5 4 Contours generator Button cont cont Menu Overlay gt Contour plot Aladin has a contour extraction tool that lets you generate isophotes for and image The Overlay lt Contour plot opens a control window that will let you adjust the number of isophotes needed as well as their pixel level with respect to the histogram of the pixel distribution in the image It is possible to smooth or to reduce the noise in the image before the extraction of contours You can also restrain the extraction to the part of the image that is seen in the view This last parameter is useful to reduce the computing time for very large images Cholssissez la valeur de chaque niveau Pixel walues histogram 51 102 153 204 G n rez niveaux quidistants Ajouter manuellementun nouveau niv Lissage actif Niveaux de lissage R duction du bruit Travailler sur la portion visible montrer AIDE Contours will be saved in a plane of the stack and overlaid to the initial image but also to other images celestial coordinates are saved For example this property lets you
100. overdrawn on the image This controller uses usual conventions from tape recorder pause play backward forward Below the controller a ruler displays the location of the current image in the cube This ruler as well as the controller can be manipulated with the mouse le Ah f 002 Translucent image It is also possible to display an image in a translucent way above another image This is in particular useful when the image to display in translucence is smaller than the background image In order to activate the translucence of an image one should use the magenta colored ruler that appears below the plane logo for the image that can be projected Once the ruler is fully to the right the image located on top will completely hide the corresponding part of the image below CLS JeLw01010 It can be useful to swap image planes in the stack in order to modify the background foreground images Reticule Menu Overlay gt Reticule The reticule enables to locate a particular location in the view Usually this is the location clicked most recently The reticule can be displayed as a small magenta cross or as two cosecant lines One can also not display it menu Graphic lt Reticule The reticule coordinates are shown in the field Location in the location box Conversely typing the location or the name of an object in this box moves the reticule to the corresponding location P
101. particular for the one in the FITS format If this is not the case for example for a JPEG image given by the user it is possible to compute its astronomical solution menu mage lt Astrometrical calibration cf 5 8below Sometimes objects do not exactly overlap with the image either because their locations are approximate or because the astrometrical solution is uncertain Activating planes Planes shown in the view are those that were activated in the stack One can hide one of the planes temporarily or even hide the background image cf Switching to the next image Menu View gt Next image Short key Tab If the stack has several images it is possible to switch quickly from one image to the other by simply activating the corresponding image plane Automatically all the graphical planes drawings and catalogs that can be superimposed on the image will be activated The menu item View lt Next image or the TAB key do the same action This can be particularly useful when in full screen or simple window mode c f below Cube or animated sequence For an image data cube cf 5 10 associations or FITS cubes the plane in the stack holds several images that will be displayed in the view as an animated sequence 1 e image after image with a tuneable delay 400ms by default that can be changed in the plane properties The view in which the cube is visualised the cube shows a pace controller
102. pixel value corresponding to the mouse pointer in the view Each of these informations can be displayed in a specific reference system given in the folding menu located on the right of each of these fields Position 05 34 29 70 22 03 34 7 Pixel 0 3428 Location The location can be given in celestial coordinates or in abscissa ordinate in the image The celestial referentials available are ICRS J2000 B1950 Ecliptic Galactic Supergalactic The display may be either sexagesimal or decimal The accuracy of the location depends on the current zoom factor Pixel value The pixel value can be given in three ways 8 bits The one colour level usually grey is used for current display It gives a value between O and 255 that depends mainly on the contrast parameters that were chosen If the image is in JPEG only this display mode will be available Raw file The value used for coding pixels in the image file Full The physical value for the pixel This value is given from the code value raw multiplied by a scaling factor supplied with the image BSCALE according to the FITS format and is offset from the origin BZERO This last value Full is the most significant and is the one given by default Full raw BSCALE BZERO If the BSCALE and BZERO parameters and not given the Full value for a given pixel will be the same as its Raw value ey ey Saving the current information Values in the informatio
103. played divided by the total number of sources is given with the counter on the bottom right of the Aladin window 138 sel 1036 src Browse through the measures Exploring measures and most noticeably viewing rapidly the associated sources is done thanks to the selection of the specific line in the table of measures The selected line appears with a blue background glued to the line even if the mouse is not over it aye Basg l z GLEL 190 0441541 ll 6lai FHC96 1565 FH 190 047 I Bla PRE Sia L553 P 190 0457416 11 613 Selecting a line of measure is done either manually or with the research expression Select a line of measure with the mouse Selection with the mouse is done either in the measure panel with a simple mouse click outside a web link or a button or by clicking on a selected source in the view green squares It leads to a move of the reticule magenta cross on the corresponding sources When the selection was done through the table the view is automatically centred on the source unless the view was locked cf A double click will zoom in Despite the difficulty to explain it in writing it is easy to do Reminder to redisplay the view globally use Ctrl click in the zoom panel Selecting a line of measure with an expression The input box used to select sources is also used to select a specific line of measures Thus writing an expression WITHOUT validating it neither Enter not the
104. position Aladin does not manipulate the concept of distance to the observer We will briefly describe the available Aladin operations on images catalogs graphical overlays and views Image processing functions ee Pixel range adjustments contrast Symmetry top gt bottom right gt left Image colour composition from 3 original images Image mosaicing Cube generation from several images covering the same field Image resampling image re projection according to the astrometrical solution of another image Image astrometrical calibration by parameters or by matching stars Pixel computations addition subtraction multiplication division convolutions normalisation e ee ee ee ee e ee e ee oe Note In case of huge images several gigabytes only the basic processing functions are available pixel adjustment symmetry Contraste des pixels Ctrl M Loupe Ctrl G Graphes de coupe Cr er une image RvB Cr er une image Mosaic Creer une image sequence anim e R chantillonner Calibration astrom trique Sym trie b Haut Bas Operations arithm tiques Droite Gauche Convolution Pyramidal Normalisation des pixels 0 1 Gauss P hal Mex k Dupliquer le plan image AA n z Tophat Copier les pixels visibles dans un nouveau plan au Edge Catalogue processing functions Catalogue Corr ler les catalogues s lectio
105. position in the third one This image is then called the reference image By default the reference image will be the image for which the angular pixel size is the smallest This resampling is based on the nearest neighbour pixel algorithm cf resampling G n rateur d images couleurs RVB Sel Access to the window Sp cifiez deux ou trois images une pour chaque composante couleur d signez l image de r f rence du reechantillonnage puis appuyez CREE pour g n rer l image RYE POSSILE DSS2 220 M51 POSSILJDSS2 220 M51 Image de r f rence du r chantill R CG QE The window to generate a colour image can be accessed either with the menu Image 3 Create a RGB image Or with the rgb button The default choice of the images for each component depends on the state of the stack If there are only two or three selected planes Aladin will use them to fill the form else Aladin will take the 3 images on top of the stack or else the 2 first ones If the image associated wavelengths are known Aladin will sort them according to this parameter Specific case for 2 images It is possible to only select 2 images In such a case the 3 colour component will be computed according to the 2 other by taking the average of the two other images This method builds very nice colour images if the free component is the green colour default mode 2 images differences With 2 images it is also pos
106. psoidal errors for the location arrows for which the location and size are relative to proper motion values Showing a filter in the stack The filter is displayed as a peculiar plane in the stack and applies to all catalog planes located above the filter plane Using a predefined filter Aladin has some predefined filters that correspond to the usual handlings in astronomy You can then select one of them and apply them instantaneously with the menu Catalog Predefined filters Dessine des cercles proportionnels la luminosit des objets Affiche uniquement les objets brillants magnitude lt 12 Affiche uniquement les objets faibles magnitude gt 17 Inscrit les types d objets Trace le mouvements propres des toiles On the other hand it is often useful to tune filter constrains and to do so one needs to create and edit the filtering rules manually This is what is going to be detailed in the following section Create a filter A filter can be created with the filter button in the tool bar or with the menu Catalog lt Create a filter Two modes can be used thanks to tabs The beginners mode which is like using a predefined filter see above The expert mode where you can edit the filtering rules by yourself Propri t s Propri t du filtre Filter11 Un Filtre vous permet de modifier et contraindre l affichage des plans catalogues Propri t du Filtre Filteril Mode d
107. rge Sans r ticule Catalogue sources graphical shapes images image with gt moving gt rotation View operations Plein cran Fil F Simple fen tre Fiz Image suivante Tab Creer une vue par image F3 e Zooming and panning Supprimer les autres vues Creer des Ues wignettes View synchronization same scale same Woe verrouillee orientation Thumbnail view generator for a list of objects ess Fl Full screen display 2 Z paneauzx Maj F2 4 panneaux FE 9 panneaux F3 These functions can be operated via a standard 16 panneaux F4 i i graphical interface As usual in this type of Panneau scotch software several alternatives are available for satisfying various work habits Uniformiser l chelle alt 5 dun oe 1 The menu bar on the top of the window UniFormiser l chelle et l orientation alt 0Q e ee Display of several views simultaneously 2 4 9 or 16 views 2 The tool bar list of clickable buttons 3 Popup menus available via a mouse right click or CTRL click Mac 4 Some keyboard shortcuts Note it is also possible to perform these operations via a script mode via described at the end of this manual cf We will discover the various GUI components and how they work 5 The graphical interface in details Aladin offers a rich graphical interface for achieving in a few clicks most basic functions The two main windows are The main window for disp
108. rtaines donn es el Fonctions avanc es ne sont pas accessibles The preference window lets you also Create your own translation language see below Reload during the session all the data server definitions which will also reinitialise the internal cash for Aladin metadata Some parameters are not tuneable but can be simply kept from one session to the other for example the size and location of the Aladin window the reticule type large or classical the activation or not of info bubbles on sources Trick The configuration parameters are kept in simple ASCII file Aladin conf that can be edited in the aladin directory on your home directory HOME en unix Document and Settings YourName in Windows To reinitialize the parameters to the original configuration you only need to delete this file Interface language management Aladin does support several languages for its graphical interface It is possible to create your own translation if the language you wish to have is not yet supported To do so use the New translation button and specify in English oo you language and the 2 letter code that corresponds to it e g French fr Aladin will open an editing window that displays all expression that need to be translated en English those that were already translated if some exist and those that are not necessary anymore used by a former version for example You can install your transl
109. s the following A strip showing how the 256 pixel levels look An histogram showing the pixels distribution between the smallest and the largest values kept by Aladin Three tuning cursors And information and control band ve ve ve oe Ina single click If you wish to only increase or decrease the image contrast without modifying the range of kept pixels you can modify the transfer function that was chosen Log a lot of contrast Sqrt some contrast Contraste Log Sqrt Linear Pow Linear normal Pow2 little contrast oe oe If you wish to refine the pixels dynamics you need to read and understand what follows Information on pixels a the bottom of the ome you will Intervalle d orig 2 0 4142 0 information giving the minimum an ne maximum values existing in the image as US 610 86 well as the lower and upper thresholds estimated by Aladin in an automatic way autocut limits The curve over plotted on the histogram shows the transfer function that is used to relate the retained pixels values and the 256 possible levels By default this is a simple oblique line because 1 by default the conversion is a simple linear translation and 2 the colour table is gray grey levels i e all 3 components Red Green Blue effectively displayed will always have the same values A colour table using something other than grey levels will display 3 disti
110. sbg fr java FAQ htx FoV SExtractor The source extraction This form gives access to the SExtractor tool Bertin amp Arnouts 1996 http terapix iap fr and to generate a source catalog from the current image This form is described in details in section 5 2 7 Aladin s form characteristics The Aladin images tab opens the access form for images based at CDS agin Strasbourg France especially for Aladin You will find there among images others the DSS 2MASS DENIS IRAS IRIS WENS images On of the characteristics of the Aladin image server is to be able to send monochrome astronomically calibrated images in the JPEG format if the pass band of your network is low this is the most convenient image server Another characteristic is that when the list of the available images is presented as a table it is possible to sort the images by clicking on the headlines of the table 5 2 8Vizier s form characteristics The VizieR server gives access to almost all astronomical catalogs several vant thousands It can be simple tables published in the scientific literature as well as catalogs from large surveys among which some contain several billions of objects It can also be mission logs which are historical pointing from the large telescopes In order to simplify the VizieR use Aladin has 3 forms SY All Vizier a generic form to access almost any catalog Y Surveys a form dedic
111. sible to do a colored subtraction The positive differences will be the values from the first colour component the negative differences will be those for the second colour component Furthermore the differences will be normalized between O and 255 to give a maximum contrast This method is interesting to visualise variations in a quick way even small ones between two images 5 10 Images associations cubes and mosaics Icon assoc 35506 Menu Image gt Mosaic image builder Image gt Blink Movie generator Aladin can associate 2 or more images by combining them either as a cube that will be displayed as an animated sequence or by creating a new mosaic image from the original images Access to the association window Associations d images _ Sp6cihez las mages que OLE d si j The window can be opened either with the menu SE Mens Image Mosaic image builder or Image lt Blink Movie generator or else with the assoc button and lets you control the association You can indicate the original image planes the initial s acom sequence delay in the case of producing a cube and aucun the reference image if resampling is needed pour 7 aucun superimposed pixels aucun MII 10 aucun Mosaic Hossa 9 S quence anime d is 400 ms When producing a mosaic image the image image der l rence du r dcharitz obtained will have the required size in order to Core re into rene
112. strasbg fr tutorials aladin gml The following sections present some notes on the varu ious uses of Aladin For more information please refer to the FAQ mentioned above 8 1 User profiles Aladin provides a large number of options and functions for manipulating images and catalogues with a relatively complex graphical interface It is possible to change the interface to accomodate the needs of users who may have different needs and to provide a simpler interface if desired for first time users Aladin est un logiciel qui permet un grand nombre de manipulations sur les images et sur les catalogues Afin de permettre une prise en main plus facile pour les utilisateurs d butants il peut tre d marr en profil undergraduate Dans ce mode seules les fonctions de base sont accessibles dans les menus et dans la barre des outils D autre part Aladin peut tre galement utilis pour de simple visualisation d images et catalogues sans proposer a l utilisateur l ensemble des possibilit s de l interface graphique Pour cela Aladin peut tre d marr en profil preview Dans ce mode Aladin n affiche que la vue courante sans les autres panneaux de la fen tre principale Le profil de d marrage se configure via la fen tre des pr f rences utilisateurs cf 5 14 Profile l usage certaines donn es et Fonctions avanc es ne sont pas accessibles Pour d marrer selon le profil undergraduate il est g
113. talog acharias 0051 F R 53 DAI1 284 Joptical 51 The USNO B1 0 Catalog Monet 2003 1 305 optical 49 The Guide Star Catalog Version 2 3 2 G 14271 optical 34 The GSC 2 2 Catalogue STScI 2001 1 289 ss optical 12 UCACZ Catalogue Zacharias 2003 I 293 optical 4 NPMZ Cross Identifications Klemola 2004 I 261 Joptical 4 The FON Astrographic Catalogue FONAC 1 Ollrsae34a Joptical 2 Lick NPMZ Catalog Hanson 2003 I 280A optical 2 All sky Compiled Catalogue of 2 5 millio 11259 Joptical 2 The Tycho 2 Catalogue Hog 2000 1114239 optical 2 The Hipparcos and Tycho Catalogues ESA CO J MMRAS 3 Radio l Proper motions of 74 pulsars Zout 2005 OI MNRAS 3 Radio Old 4pI 582 optical 1 Revised WLTT Catalog Salim 2003 v 98 1 306 optical 1 Catalogue of stars with high proper moti l li 298 Joptical 1 LSPM North Catalog Lepine 2005 1 270 111250 optical 1 The Tycho Reference Catalogue Hogt 1998 Olitszas Joptical 1 The ACT Reference Catalog Urban 1997 Surveys and Missions Both other forms dedicated to VizieR gather for the sake of convenience all the large surveys on one side and on the observations lists on the other side that are available in VizieR These distinctive catalogs are presented as a clickable list Description Mb of ER USNO B1 The USNO B1 0 Catalog 1045913 USNO A2 The USNO A2 0 Catalog 526
114. ts Red Green Blue will be shown simultaneously Depth cut associated with the Tag tool The location and selection of a tag with the Zag tool in an image cube will generate also a cutting plot However this time it is along the depth of the cube In the plot thereby obtained the vertical red line corresponds to the location of the current image in the cube in Aladin a cube is seen as a sequence of images The value mentioned at the bottom of this mark gives the physical scale corresponding to the current image in the cube e g the speed As for the distance tool moving the tag with the mouse leads to the automatic scaling of the plot Furthermore going over the plot with the mouse pointer glves the value of the corresponding pixel coordinates in the plot A horizontal click and drag will move the red line out of the current image and hence will change the image in the current view The magnifying glass tool Button mglss Menu Image gt Magnifier glass Short key Ctrl G When the magnifying glass is activated the zoom panel bottom right of the main window will be temporarily used to show a zoom of the pixels around the mouse pointer while it moves around the view Using displacement keys left down right up arrows is then possible to move pixel by pixel the mouse pointer The del tool x Button Del X Menu Edit gt Delete Edit gt Delete all Short key Delor Maj Del The
115. ttp aladin u strasbg fr tutorials aladin gml Let s assume that we loaded in the left view a JPEG image that is not calibrated and a DSS image of the same field with an astrometrical catalog like UCAC2 overlaid in the right view The method to calibrate the JPEG image is to click successively on a star in the non calibrated image and then on the corresponding UCAC2 source For each click with the mouse Aladin fills the table in the calibration board Four corresponding measures are usually enough to get a good calibration ER Calibration 113 Filter v EEE UCAC position x y hh mm ss dd mm ss FR nqc2207_hst jec 611 5079 443 2739 ra E30 POSS2UKS5 06 16 32 86 21 22 00 1 06 16 16 00 21 21 27 7 06 16 19 91 21 21 14 3 06 16 30 63 21 2404 9 52 3453 5 8105 277 5673 24 A 11 1 606 4999 656 5 Note When one needs to get the coordinates for a start by clicking with the mouse Aladin uses an algorithm with a barycentre centroid If it is not possible to determine the centre too wide a star a message will be display to say that the clicked location will be taken as it is Tricks It can be useful to perform the symmetry of the DSS image in order to get closer to the orientation of the image to calibrate Image Symmetry It is better to only display the bright stars with little proper motion Using a filter an
116. ublication Backup the stack and views for a further use Exporting one or several planes in the stack The images will be exported in FITS or JPEG for colour images catalogs in TSV Tab Separated Value or VOTable cf 8 2 Access to URL that gave the images and catalogs ey ey ey ey Sauvegarde Aladin Choississez l une de ces possibilit s Imprimer Imprime les vues ainsi que les leurs Surcharges graphiques vues ra sauve Sauvegarde la vue courante dans as la vue un fichier courante Sauve Cree un fichier unique m morisantla pile courante la pile Le format est propre Aladin format Ad Exporte vous permet de sauvegarder des plans certains catalogues en ASCII TSY ou VOTable plans images en FITS ou BMP pour les images RWB G n re G n re une page Web avec des liens les llens surles images originales images Fermer Generate a clickable map When save the Aladin view the format PNG LINK is offered This format is dedicated to the creation of Web clickable maps The view is save with the classical PNG format A second file is generated simultaneously with a Ink extension It contains an ASCII format that is very simple for clickable objects present in the view their position in the PNG image and a URL to access to the whole associated record Both files are located on a web server and will let you build easily a clickable map For more details
117. will be automatically adjusted The move is validated with the CREATE or MODIFY button which computes the new celestial positions according to the indicated offset Catalog with only XY positions If you load a table or catalog without celestial positions but with two columns representing the XY coordinates that Aladin could detect based on the column names and or the attached UCDs the calibration window of the catalog is instantaneously opened inviting you to create a calibration for these sources Saving a recalibrated catalo Once you save a catalog after its recalibration Aladin systematically adds two columns with the celestial position for each source 5 9 RGB colour image builder Icon rgb LA Menu Image gt RGB image builder Aladin can build a true colour image from 2 or 3 images with grey levels To do so the first component will be affected to the red colour and the 125 possio c second and third images will be gt DA POSSILN I affected to green and blue components J posse respectively The true colour image will be saved in a plane of the stack Trick If the mouse cursor is on the RGB plane logo that was created the 3 logos for the 3 original images appear with the colour of their respective component Resampling In order to have the image pixels corresponding to the same locations on the sky Aladin does a resampling on two of the images according to the astrometrical
118. xtracting sources from images S extractor A labels generator ve oe oe Each of these tools is breifly described below 6 1 Simbad Pointer Menu Tools gt Simbad automatic pointer To aid the exploration of an image activate the Simbad pointer which starts a continuous connection with the Simbad database When your mouse remains over the same location in the image for a few moments Aladin queries the Simbad database and returns a short list of information about objects at that position the principle identifier the object type the spectral type The criteria used in selecting information from the database is based on the number of bibliographic references Note If a Simbad has already been performed with the result is Saisissez ou chargez un script macro avallable as a catalogue plane a uper alpha image then Aladin will use this 3 halpha get sHs H alpha 1 25 information to avoid multiple e image 3_red get SHS Red 1 2 5 queries to Simbad E sync normalize each image 3_halpha_norm norm cut 3_halpha sync 3_red_norm norm cut 3 red 6 2The Macro Co ntroller Saisissez ou chargez une liste de param tres Menu Tools gt Macro Controller o sehen tive tasks 1602202 tizi _ PHRIG024127 A A Lar Aladin provides a macro controller which is based on Aladin script commands see 7 1 It allows for the script commands to include input variables that
119. y will be relative to the OTYPE column object type As we see a basic filter has the following syntax a test an action SCS e This test is optional and if no test condition is given all sources are affected It is possible to indicate several actions separated by the character or by returning to the next line It is possible to have several groups test action one after the other In this case the first action in the list associated to true will be the one taken into account other lines will then be ignored S class Star draw square S class Radio draw rhomb S class Galaxy draw plus Lines starting with are comments 4 9 ey Test The test command uses usual comparison operators lt gt gt lt It can have parenthesis Boolean operations AND 88 OR NO Mathematical functions can be used abs cos deg2rad exp In log rad2deg sin sqrt tan Example Draw sources corresponding to the following expression log abs Fi Fx gt 44 draw ve Itis mandatory to use quotes for strings Joker keys are allowed et The undefined operation enables you to see lines that don t have a value for a given column oe Graphical actions Two actions are available Draw to draw a source Hide rarely used it enables you to hide specific sources When using a

User manual

Contents

Download Pdf Manuals

Related Search

Related Contents