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FORS Template Manual

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1. FORS Template Manual VLT MAN ESO 13100 2309 16 3 2 Imaging Modes 3 2 1 Direct Imaging IMG FORS2_img_acq Fast normal imaging target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one TEL ROT OFFANGLE 180 0 180 0 0 Rotator on Sky PA on Sky T 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS COLL NAID COLL_SR 6 COLL SR 6 Collimator P COLL_HR 7 FORS2_img_acq_rrm RRM imaging target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_img_obs_crsplit Multiple imaging exposure with offsets Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD PRE IMAGE SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets T TEL TARG OFFSETALPHA 999 999 0 List of Tel Offsets in RA T TEL TARG OFFSETDELTA 999 999 0 List of Tel Offsets in DEC T INS FILT1 NA
2. FORS Template Manual VLT MAN ESO 13100 2309 23 3 5 Spectrophotometric Mode SPECPHOT FORS2_specphot_acq_fast Fast wide slit spectrophotometry acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ SPEC OFFSET 0 1000 1600 500 MOS Slit Offset Amplitude T SEQ SPEC TARG Table 13 MOS_ center MOS Slit Position Set To P TEL ROT OFFANGLE 0 Rotator on Sky PA on Sky T 180 0 180 0 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS COLL NAID COLL_SR 6 COLL_SR 6 Collimator P COLL_HR 7 INS FILT1 NAME Table 10 NODEFAULT Filter1l Name P FORS2_specphot_obs_slit_fast Through slit exposure for spectrophotometry Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ SPEC OFFSET 0 1000 1600 500 MOS Slit Offset Amplitude T SEQ SPEC TARG Table 13 MO center MOS Slit Position Set To P INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS SLIT WID 5 0 5 0 MOS Slit Width arcsec T FORS2_specphot_obs_exp_fast Wide slit spectrophotometry exposure Parameters to be specified Para
3. FORS2_pmos_acq FIMS based PMOS target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET FIELD UIT1 0 25 100000 NODEFAULT Exp Time for Field Image T TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS TARG SETUP p targ file NODEFAULT FIMS Target Setup File p_targ A name SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_pmos_obs_slit PMOS through slit exposure FIMS based Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS FOCF SETUP p_focf file NODEFAULT FIMS Focal Plane Setup File p_focf A name FORS2_pmos_obs_off PMOS exposure sequence with offset along the slit Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion SEQ POL circular linear NODEFAULT Polarization Type P SEQ POL ANGLE
4. aoa e a 2 2 1 FORS Observing Modes 222 Template Types 1 saod sosa irse aa a ee aoa a a a 2 2 3 Template Keywords 24 4 4 escoa be aa g rakim Wasara A EE A 23 Acguisition Templates lt s s pga sonia e eed e eee bw a Se hee 4 2 3 1 Functionality of the Acquisition Templates 2 4 2 4 Science and Through Slit Templates SZT Throughmelt templates lt td OP a ee Ee 2 43 Association of Acquisition with Observation Templates 2 5 Calibration Templates 3 Templates Description 3 1 Colimator selection Bias and Darks po lt lt 2 5 4 46244 d Be bce ee ee 8 2 Imaging Mod s pco c saraa iaa Fo 6G 4 eee Rabe PS ee eee aR BS SS 32 1 Direct Imaging IMG sw e soe m 862 402464 be wee eee ee he a 3 2 2 Imaging with Occulting Bars OCC 0000 eee eee 3 3 Longslit Spectroscopy L n 3 4 Multi Object Spectroscopy with Movable Slits MOS 24 3 5 Spectrophotometric Mode GbPkOCRHOT 0 00000 eae 3 6 Imaging Polarimetry IPOL o co ee pee ee a d A ET BANN E ee 3 7 Spectropolarimetry PMOS ee 3 7 1 Multi Object FIMS Based Mode 0 0000 ee eee ee 3 7 2 Fast Mode for Single Target Observations 3 8 Multi Object Spectroscopy with masks MXU 0 000002 eae 3 9 HIgh Time resolution Mode HIT 391 Imagine HMT cuore PEE a eRe Ge a ee re a ee TOR Spectroscopy Miles ce ele 4 oe See Ok wee ek EE Hae Reece ee e 3 9 3 Spectrosco
5. FIMS based Parameters to be specified Parameter Range Default P2PP Label Entry INS1 FILT1 NAME Table 10 NODEFAULT Filterl Name P INS1 FOCF SETUP FIMS Focal Plane Setup File p_focf A INS1 GRIS NAME Table 11 NODEFAULT GRISM P INS1 LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS1 LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS1 LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS1 LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS1 LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp P FlatBlue 4 INS1 LAMP5 TIME 1 100000 0 Switch on Time External Lamp INS1 LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp FlatRed 4 INS1 LAMP6 TIME 1 100000 0 Switch on Time External Lamp T INS2 LAMP1 TIME 1 100000 NODEFAULT Switch on Time Lamp He 1 T INS2 LAMP2 TIME 1 100000 NODEFAULT Switch on Time Lamp HgCd 2 T INS2 LAMP3 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS2 LAMP4 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS2 LAMP5 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS2 LAMP6 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 2 T DET READ CLKIND Table 7 100kHz 2x2 high CCD Read out Setup P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO1 0 666 1 Number of Exp per Setup for scrflat T template SEQ NEXPO2 0 666 1 Number of Exp per Setup for wave tem T plate SEQ TIME1 0 25 100000 NODEFAULT Exposure Time for scrflat template
6. FORS2_hits_obs_exp_fast FORS2_hits_cal_Scrflat FORS2_hits_cal_Wave fast HIT spectroscopic acquisition HIT spectroscopy exposure through the slit HIT spectroscopy science exposure HIT Spectroscopy screen flat calibration HIT spectroscopy wavelength calibration FORS2_hitms_acq FORS2_hitms_slit_exp FORS2_hitms_obs_exp FORS2_hitms_cal_Scrflat FORS2_hitms_cal_Wave FIMS based HIT MS spectroscopic acquisition HIT MS spectroscopy exposure through the slit HIT MS spectroscopy science exposure HIT MS Spectroscopy screen flat calibration HIT MS spectroscopy wavelength calibration Table 3 A list of all acquisition science and calibration templates for spectroscopy modes FORS Template Manual VLT MAN ESO 13100 2309 7 FORS acquisition sequence 1 preset of the telescope to the center field coordinates of the target field including instrument rotator 2 set collimator of the instrument and LADC of the telescope RRM will only be triggered if the currently selected colimator is requested 3 optionally start differential tracking for instance to follow moving ob jects Not in RRM 4 select and acquire reference star for active optics and auto guiding Start and wait for the active optics and auto guiding this part of the execution requires manual intervention by the telescope and instrument operator 5 setup the instrument for the acquisition image 6 execute acquisition image of target field 7 cu
7. Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS GRIS NAME Table 11 NODEFAULT Grism P INS SLIT NAID Table 12 NODEFAULT LSS Slit P FORS Template Manual VLT MAN ESO 13100 2309 20 FORS2_Iss_cal_daycalib LSS spectroscopy screen flatfield and wavelength calibration fast mode Parameters to be specified Parameter Range Default P2PP Label Entry INS1 FILT1 NAME Table 10 NODEFAULT Filterl Name P INS1 GRIS NAME Table 11 NODEFAULT GRISM P INS1 LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS1 LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS1 LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS1 LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS1 LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp T FlatBlue 4 INS1 LAMP5 TIME 1 100000 0 Switch on Time External Lamp INS1 LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp FlatRed 4 INS1 LAMP6 TIME 1 100000 0 Switch on Time External Lamp T INS1 SLIT NAID Table 12 NODEFAULT LSS slit P INS2 LAMP1 TIME
8. T Szeifert and E Jehin FORS Template Manual VLT MAN ESO 13100 2309 1 5 Abbreviations and Acronyms The following abbreviations and acronyms are used in this manual ACQ BOB CCD CS ESO FIMS FORS HIT HIT I HIT S HIT MS HR IMG IPOL LADC LSS MIT MOS MXU OB OD OS OSF OT PMOS P2PP RA RRM SR TCS TP VLT Acquisition Broker of Observation Blocks Charge Coupled Device Constrain set European Southern Observatory FORS Instrumental Mask Simulator Focal Reducer Low Dispersion Spectrograph HIgh Time resolution HIgh Time resolution Imaging HIgh Time resolution Spectroscopy HIgh Time resolution Spectroscopy with MXU masks High Resolution Imaging Imaging Polarimetry Longitudinal Atmospheric Dispersion Compensator Long Slit Spectroscopy More Infrared Transmission Multi Object Spectroscopy Mask eXchange Unit Observation Block Observation Description Observation Software Order Separation Filter Observing Tool Polarimetric Multi Object Spectroscopy Phase 2 Proposal Preparation Right Ascension Rapid Response Mode Standard Resolution Telescope Control System Target Package Very Large Telescope FORS Template Manual VLT MAN ESO 13100 2309 3 2 FORS Templates 2 1 Introduction Observation Blocks Templates Keywords Observation Block OB Observations are described in so called Observations Blocks OB con taining all the necessary information to perform a single science or cali
9. can be used to set the position angle to the parallactic angle IMPORTANT a rotator angle of 180 must be avoided in all FIMS based mode as it will lead to an undesired flip of the mask with respect of the field Start of the guiding and other telescope functions will be done by the telescope operator Fine positioning of the target field the pointing is interactively refined through use of one or several acquisition images The aim is the centering of the target s at the desired location s in the focal plane e g to position objects in slits for spectroscopy For the fast option the offset is calculated from the actual target position in the acquisition image and the predefined reference position of the slit In case of a blind offset acquisition in fast mode the offset of the reference star to the slit is calculated We recommend to choose the reference star as close as possible to the target For the FIMS based acquisition modes the respective offsets are derived from the position of all user defined reference stars on the image in respect to the expected positions The instrument rotation offset will also be calculated and corrected if at least three reference stars are selected within the fims software The reference positions of the slits are read from the database MOS SPECPHOT or from a reference image taken during day time MXU LSS and kept up to date by the staff The recommendation on reference stars in FIMS based modes is dis
10. i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS COLL NAID COLL_SR 6 COLL_SR 6 Collimator P COLL_HR 7 INS FILT1 NAME Table 10 NODEFAULT Filterl Name P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_ipol_acq_rrm RRM IPOL target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_ipol_obs_off_fast IPOL sequence with offset in Y rotating the retarder plate Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion SEQ POL circular linear NODEFAULT Polarization Type P SEQ POL ANGLES Table 15 NODEFAULT List of Retarder Plate Settings P TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS WOLL NAID WOLL_344 13 WOLL_34 13 Wollaston Prism F FORS Template Manual VLT MAN ESO 13100 2309 26 3 7 Spectropolarimetry PMOS 3 7 1 Multi Object FIMS Based Mode
11. 0 100000 0 Switch on Time External Lamp INS LAMP6 NAID FlatRed 3 FlatRed 3 External lamp FlatRed 4 INS LAMP6 TIME 1 0 100000 0 Switch on Time External Lamp T INS SLIT WID 0 2 30 0 NODEFAULT MOS Slit Width arcsec T 3 9 2 Spectroscopy HIT S FORS2_hits_acq_fast HIT spectroscopy target acquisition fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one TEL ROT OFFANGLE 180 0 4 180 0 0 Rotator on Sky PA on Sky T 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS MASK NAID Table 16 NODEFAULT HIT Mask P FORS2_hits_obs_slit_fast HIT spectroscopy through slit exposure fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T TEL TARG OFFSETALPHA 60 60 0 Blind Offset RA T TEL TARG OFFSETDELTA 60 60 0 Blind Offset DEC T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS MASK NAID Table 16 NODEFAULT HIT Mask P FORS Template Manual VLT MAN ESO 1310
12. 1 100000 NODEFAULT Switch on Time Lamp He 1 T INS2 LAMP2 TIME 1 100000 NODEFAULT Switch on Time Lamp HgCd 2 T INS2 LAMP3 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS2 LAMP4 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS2 LAMP5 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS2 LAMP6 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 2 T DET READ CLKIND Table 7 100kHz 2x2 high CCD Read out Setup P SEQ NEXPO1 0 666 1 Number of Exp per Setup for scrflat T template SEQ NEXPO2 0 666 1 Number of Exp per Setup for wave tem T plate SEQ TIME1 0 25 100000 NODEFAULT Exposure Time for scrflat template T SEQ TIME2 0 25 100000 NODEFAULT Exposure Time for wave template T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS Template Manual VLT MAN ESO 13100 2309 21 3 4 Multi Object Spectroscopy with Movable Slits MOS FORS2 mos_acq FIMS based MOS target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET FIELD UIT1 0 25 100000 NODEFAULT Exp Time for Field Image T TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS TARG SETUP p_focf file NODEFA
13. E S EUROPEAN SOUTHERN OBSERVATORY Organisation Europ ene pour des Recherches Astronomiques dans l H misph re Austral O Europ ische Organisation fiir astronomische Forschung in der s dlichen Hemisphare ESO European Southern Observatory Karl Schwarzschild Str 2 D 85748 Garching bei Miinchen Very Large Telescope Paranal Science Operations FORS Template Manual Doc No VLT MAN ESO 13100 2309 Issue 86 0 Date 22 06 2010 I Saviane Prepac EE A hk iy da dk Ne ee EER ae Date Signature A Smette EE et ee oh A ede ee oie MG aie ka ath a Date Signature C Dumas TOISAS Ct ent cet coca eg Oa a at ld nee dt oP kDa Wet ob te Ne eh Date Signature FORS Template Manual VLT MAN ESO 13100 2309 This page was intentionally left blank ii FORS Template Manual VLT MAN ESO 13100 2309 Change Record Issue Rev date Section Para Reason Initiation Documents Remarks affected 1 0 1 5 various dates all part of FORS1 2 User s Manual 2 0 draft Sep 3 2000 all Draft extracted from FORS User s Manual 2 0 Sep 17 2000 all First release after MXU comm 2 1 Dec 27 2000 all Unification of template description inclusion of p2pp parameter tables FORS2_mxu_obs_off template included 2 2 Jun 27 2001 all P68 updates 2 3 Jan 3 2001 all P69 updates MIT mosaic 2 4 May 22 2002 all P70 updates 2 5 Dec 24 2002 1 2 4 only minor changes 2 6 Dec 10 2003 all HIT mode temp
14. For linear polarimetry 0 22 5 45 67 5 degree retarder plate angles and NEXP 3 and NOFF 2 this would end up with 24 exposures Size and Sign of jitter offsets When lists of offsets are given in sky coordinates they are applied to the telescope while offsets given in CCD coordinates are applied to the target This means that in the default position zero rotator angle an offset of 20 in RA will move the target to the right by 80 binned px Likewise an offset of 20 in DEC will move the target downwards by 80 binned px If instead one requires an offset of 10 px in x and y directions the target will move to the right and upwards as expected 2 4 3 Association of Acquisition with Observation Templates For each observation it is required to select the acquisition template which is associated to the type of observation description templates in the OB As already mentioned the through slit template is mandatory for all observations which will have to put targets on slits In most case the fast FORS Template Manual VLT MAN ESO 13100 2309 12 acquisition mode should be preferred if both options are available In PMOS mode the fast mode is available for single target observations only Mode Acquisition Template Through Slit Template Science Template IMA FORS2_img_acq FORS2_img_obs _crsplit IMA RRM FORS2_img_acq_rrm FORS2_img_obs_crsplit OCC FIMS FORS2_img_acq_algn FORS2_img occ_crsplit LSS FORS2_Iss_acq_fast
15. NODEFAULT Switch on Time Lamp He 1 T INS2 LAMP2 TIME 1 100000 NODEFAULT Switch on Time Lamp HgCd 2 T INS2 LAMP3 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS2 LAMP4 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS2 LAMP5 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS2 LAMP6 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 2 T INS2 SLIT WID 1 1 MOS Specphot Slit Width arcsec F DET READ CLKIND Table 7 100kHz 2x2 high CCD Read out Setup P SEQ CCD B R ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO1 0 666 1 Number of Exp per Setup for scrflat T template SEQ NEXPO2 0 666 1 Number of Exp per Setup for wave tem T plate SEQ SPEC OFFSET 0 1600 500 MOS Slit Offset Amplitude T SEQ SPEC TARG Table 13 MOS Slit Posi P tion Set To SEQ TIME1 0 25 100000 Exposure Time for scrflat template T SEQ TIME2 0 25 100000 Exposure Time for wave template T FORS Template Manual VLT MAN ESO 13100 2309 25 3 6 Imaging Polarimetry IPOL FORS2 ipol acq fast Fast IPOL target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T TEL ROT OFFANGLE 180 0 4 180 0 0 Rotator on Sky PA on Sky T 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0
16. T SEQ TIME2 0 25 100000 NODEFAULT Exposure Time for wave template T FORS Template Manual VLT MAN ESO 13100 2309 32 3 9 HIgh Time resolution Mode HIT 3 9 1 Imaging HIT I FORS2_hiti_acq_fast HIT imaging target acquisition fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ SPEC OFFSET 1281 1281 MOS Slit Offset Amplitude F SEQ SPEC TARG MOS_center MOS_center MOS Slit Position Set To F offset offset TEL ROT OFFANGLE 180 0 4 180 0 0 Rotator on Sky PA on Sky T 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS FILT1 NAME Table 10 NODEFAULT Filter Name P FORS2_hiti_obs_slit_fast HIT imaging through slit exposure fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ SPEC OFFSET 1281 1281 MOS Slit Offset Amplitude F SEQ SPEC TARG MOS center MOS center MOS Slit Position Set To F offset offset INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS SLIT WID 0 2 30 0 NODEFAULT Slit width in arcseconds T FORS2_hiti_obs
17. Table 16 NODEFAULT HIT Mask P FORS2_hits_cal_wave HIT spectroscopy wavelength calibration Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 8 NODEFAULT CCD Read out Setup P SEQ NEXPO 1 666 1 Number of Exp per Setup T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS GRIS NAME XGRIS_600B 92 NODEFAULT Grism P XGRIS_3001 91 INS LAMP1 TIME 1 0 100000 NODEFAULT Switch on Time Lamp He 1 T INS LAMP2 TIME 1 0 100000 NODEFAULT Switch on Time Lamp HgCd 2 T INS LAMP3 TIME 1 0 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS LAMP4 TIME 1 0 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS LAMP5 TIME 1 0 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS LAMP6 TIME 1 0 100000 NODEFAULT Switch on Time Lamp Ne 2 T INS MASK NAID Table 16 NODEFAULT HIT Mask P FORS Template Manual VLT MAN ESO 13100 2309 35 3 9 3 Spectroscopy with masks HIT MS FORS2_ hitms acq HIT MS target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET FIELD UIT1 0 100000 Exp Time for Field Image T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Start DEC T 00 00 00 0 INS F
18. a list of angle settings to be executed with the instrument 4 6 10 HIT S mask selection The available masks for the spectroscopy modes of the HIT mode These give you a square aperture of the slit width given in Table 16 FORS Template Manual VLT MAN ESO 13100 2309 P2PP name Filter type GG375 80 Order sorting filter GG375 GG435 81 Order sorting filter GG435 0OG590 32 Order sorting filter OG590 FILT_465_250 82 R_SPECIAL 76 I_BESS 77 u_HIGH 112 g HIGH 113 v_HIGH 114 b_HIGH 115 u_GUNN 38 v_GUNN 39 g GUNN 40 r_GUNN 41 z GUNN 78 OU 7 A4 OTI 4000 45 OTI 8000 46 Hell 47 HelI 3000 48 HelI 6500 49 OUT b OTII 3000 51 OTII 6000 52 Hel 53 Hel 2500 54 Hel 5000 55 OI 56 OI 2500 57 OI 4500 58 H_Alpha 83 H_Alpha 2500 60 H_Alpha 4500 61 SII 62 SII 2000 63 SII 4500 64 SII 65 SII 1500 66 SII 3000 67 FILT_485_37 68 FILT_691_55 69 FILT_815_13 70 FILT_834_48 71 FILT_530_25 84 FILT_500_5 85 FILT_503_5 86 z SPECIAL 43 FILT_917_6 88 Special order sorting filter Bessel Special R filter Bessel I filter High through put special u filter High through put special g filter High through put special v filter High through put special b filter Gunn u filter Gunn v filter Gunn g filter Gunn r filter Gunn z filter O II filter O II filter red shifted by 4000 km s O II filter red shifted by 8000 km He II filter He II filter red shifted by 3000 km s He II filter red
19. calibration frames The observatory staff will take care to get the appropriate exposure levels Twilight flat execution sequence 1 2 perform instrument and CCD setup make a fast exposure to estimate the exposure time to reach the user specified exposure level in subsequent sky flat images if exposure time within allowed range start sky flat field exposure after each sky flat measure exposure level and scale exposure time for next twilight flat to reach predefined level perform telescope offset repeat steps 3 5 until number of flatfields are taken or exposure time is too long evening 300s max or too short morning 0 25s min or template is aborted FORS Template Manual VLT MAN ESO 13100 2309 14 3 Templates Description The following sections list in tabular form for each template 1 the template keywords 2 the value range for the keywords 3 the default values 4 the P2PP name of the keyword entry fields 5 the selection and entry option for the keyword The tables are sorted by observing mode For each observing mode the acquisition the science and the calibration templates are given in this order From P2PP only items 2 4 from the list above are visible The exported OB file extension obx of an OB contains item 1 plus the actual value of the keyword parameters as set by the user Section 4 explains the P2PP entry fields in some more detail Keywor
20. exp fast HIT imaging exposure fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 8 HIT OS1 1sec CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup T SEQ SPEC OFFSET 1281 1281 MOS Slit Offset Amplitude F SEQ SPEC TARG MO center MO center MOS Slit Position Set To F offset offset INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS GRIS NAME none none Grism P INS SLIT WID 0 2 30 0 NODEFAULT Slit width in arcseconds T FORS Template Manual VLT MAN ESO 13100 2309 33 FORS2_hiti_cal_scrflat fast HIT imaging screenflat fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 8 CCD Read out Setup P SEQ NEXPO 1 666 1 Number of Exp per Setup T SEQ SPEC OFFSET 0 1000 1600 1281 MOS Slit Offset Amplitude F SEQ SPEC TARG MOS_center MOS_center MOS Slit Position Set To F offset offset INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS LAMP1 TIME 1 0 100000 1 Switch on Time Lamp FlatBlue 1 T INS LAMP2 TIME 1 0 100000 1 Switch on Time Lamp FlatBlue 2 T INS LAMP3 TIME 1 0 100000 1 Switch on Time Lamp FlatRed 1 T INS LAMP4 TIME 1 0 100000 1 Switch on Time Lamp FlatRed 2 T INS LAMP5 NAID FlatBlue 3 FlatBlue 3 External lamp P FlatBlue 4 INS LAMP5 TIME 1
21. in modes MOS MXU HIT MS and PMOS will require the preparation of masks with fims Occulting bar imaging and slitless spectroscopy is only supported with fims based modes Typically the mask design has to be ready before starting the preparation of the OBs Any observation in modes IMG IPOL LSS HIT I HIT S and single target observations in PMOS mode can be done without mask preparation with fims These are the so called fast observations A sub category of these are RRM templates which are similar to fast templates but with less user interaction due to the nature of RRM observations FORS Template Manual VLT MAN ESO 13100 2309 4 Observing Mode Acronym Options RRM FAST FIMS Direct imaging IMG X X Imaging with occulting bars OCC X Longslit spectroscopy LSS X X Multi object spectroscopy movable slits MOS X Imaging polarimetry IPOL X X Spectropolarimetry PMOS X X X Multi object spectroscopy slit masks MXU X HIT imaging HIT I X HIT spectroscopy HIT S X HIT spectroscopy with masks HIT MS X Spectro photometric standard stars SPECPHOT X Table 1 Observing modes of FORS2 For faint targets we support blind offset acquisition modes for all the fast modes this is done with the through slit templates The astrometric requirements are similar for blind fast acquisitions and fims acquisitions In general the OB execution won t be much faster but the OB preparation will be For the acqu
22. units The default values should not be changed by the users since the values are kept updated by the observatory staff External Lamp Selection of the external lamps only one of the two external lamps can be used at a given time Two of the external lamps FlatBlue 4 and FlatRed 4 will be projected in focus onto the fiber bundle high flux and the two other lamps FlatBlue 3 and FlatRed 3 off focus with lower flux level By default the off focus lamps FlatBlue 3 and FlatRed 3 i e low flux level are selected Switch on Time External Lamp the switch on time of lamp FlatBlue 3 or FlatBlue 4 in seconds Default is 0 i e the lamp is off Switch on Time External Lamp the switch on time of lamp FlatRed 3 or FlatRed 4 in seconds Default is 0 i e the lamp is off 4 5 Hidden P2PP parameters CCD Windowing Flag CCD windowing option This option is hidden and should not be used except for technical purposes CCD Window X Start start pixel in X direction for the CCD window read out Default is pixel 1 CCD Window Y Start start pixel in Y direction for the CCD window read out Default is pixel 1 except for SPECPHOT templates default 450 CCD Window X Size number of pixels of the CCD read out window in X direction Default is 1 pixel except for SPECPHOT templates default 2048 CCD Window Y Size number of pixels of the CCD read out window in Y direction Default is 1 pixel except for SPECPHOT templates default 1000 Aut
23. 0 2309 34 FORS2_hits_obs_exp_fast HIT spectroscopy exposure fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 8 NODEFAULT CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup T SEQ NOFFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filter Name P INS GRIS NAME XGRIS_600B 92 NODEFAULT Grism P XGRIS_3001 91 INS MASK NAID Table 16 NODEFAULT HIT Mask P FORS2_hits_cal_scrflat HIT spectroscopy screen flatfield Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 8 NODEFAULT CCD Read out Setup P SEQ NEXPO 1 666 1 Number of Exp per Setup T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS GRIS NAME XGRIS_600B 92 NODEFAULT Grism P XGRIS_3001 91 INS LAMP1 TIME 1 0 100000 1 Switch on Time Lamp FlatBlue 1 T INS LAMP2 TIME 1 0 100000 1 Switch on Time Lamp FlatBlue 2 T INS LAMP3 TIME 1 0 100000 1 Switch on Time Lamp FlatRed 1 T INS LAMP4 TIME 1 0 100000 1 Switch on Time Lamp FlatRed 2 T INS LAMP5 NAID FlatBlue 3 FlatBlue 3 External lamp P FlatBlue 4 INS LAMP5 TIME 1 0 100000 0 Switch on Time External Lamp INS LAMP6 NAID FlatRed 3 FlatRed 3 External lamp FlatRed 4 INS LAMP6 TIME 1 0 100000 0 Switch on Time External Lamp T INS MASK NAID
24. 0 arcsec List of Tel Offsets in CCD Y Direction list of telescope offsets along the slit The offsets are given in arcsec Default is 0 arcsec The list can contain more or less values than the number of offsets indicates If more only the requested number of offsets are executed starting with the first one If less the y offset list is repeated until the requested number of offsets are executed The telescope offsets are executed relative to the last position and before the start of the exposure series Positive negative offset values move the object in positive negative Y direction on the CCD At the end of the exposure sequence the telescope returns to the start position This parameter corresponds to entry field number of offsets in the y pixel direction Blind Offset RA telescope offset in arcsec in right ascension for a blind offset The offset will be executed only of 0 The offset from the reference star to the target must be entered here The default value is 0 arcsec Blind Offset DEC telescope offset in arcsec in declination for a blind offset The offset will be executed only of 4 0 The offset from the reference star to the target must be entered here The default is 0 arcsec 4 4 User defined P2PP entry fields INS keywords LSS Slit the longslit to be used for the spectrum exposure The slit selection is done from a pull down menu For the available longslit see list in section 4 6 7 Default is NODEFAULT i e use
25. 00 NODEFAULT Switch on Time Lamp HgCd 2 T INS2 LAMP3 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS2 LAMP4 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS2 LAMP5 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS2 LAMP6 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 2 T SEQ CCD B R ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO1 0 666 1 Number of Exp per Setup for scrflat T template SEQ NEXPO2 0 666 1 Number of Exp per Setup for wave tem T plate SEQ POL circular linear NODEFAULT Polarization Type P SEQ POL1 ANGLES Table 15 NODEFAULT List of Retarder Plate Settings for Arcs P SEQ POL2 ANGLES Table 15 NODEFAULT List of Retarder Plate Settings for Arcs P SEQ TIME1 0 25 100000 NODEFAULT Exposure Time for scrflat template T SEQ TIME2 0 25 100000 NODEFAULT Exposure Time for wave template T DET READ CLKIND Table 7 100kHz 2x2 high CCD Read out Setup P 3 7 2 Fast Mode for Single Target Observations FORS2_pmos_acq_fast Fast PMOS target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T TEL ROT OFFANGLE 180 0 4 180 0 0 Rotator on Sky PA on Sky T 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS FILT1 NAME Tabl
26. AR eS 44 FORS Template Manual VLT MAN ESO 13100 2309 1 1 Introduction 1 1 Scope All observations with the VLT are carried out with observing blocks OBs OBs are prepared with the phase 2 proposal preparation software P2PP With P2PP the mode specific observation templates will be selected by the users and the parameter fields keywords are set to the user specified values The P2PP manual introduces the functionality of the P2PP software while this FORS2 Template Manual describes the FORS templates and the keywords A general overview of the instrument and the FIMS mask preparation for FORS is given in the following manuals e FORS2 FIMS Manual ESO document VLT MAN ESO 13100 2308 e FORS2 User Manual ESO document VLT MAN ESO 13100 1543 The FORS user manual and the FIMS manual can be retrieved from the FORS user pages http www eso org instruments fors The P2PP Manual and more informations about service mode OB preparation is available on page http www eso org observing p2pp 1 2 Contact Information In case of questions related to your Service Mode observations and proposal preparation please contact the User Support Department through email usd help eso org For visitor mode observation runs please contact the Paranal Science Operations Team fors2 eso org 1 3 Changes in this edition e None 1 4 Acknowledgments The earlier versions of this manual have been edited by H Bohnhardt G Rupprecht
27. FILT1 NAME Table 10 NODEFAULT Filterl Name P INS FOCF SETUP p_focf file NODEFAULT FIMS Focal Plane Setup File p_focf A name INS GBR SETUP p gbr filename NODEFAULT FIMS MXU Mask Gerber Setup File A p gbr INS TARG SETUP p targ file NODEFAULT FIMS Target Setup File p_targ A name SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_mxu_obs_slit MXU through slit exposure FIMS based Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T INS FILT1 NAME Table 10 NODEFAULT Filter Name P INS FOCF SETUP p focf file NODEFAULT FIMS Focal Plane Setup File p_focf A name FORS2_mxu_obs_off MXU mask exposure with offsets FIMS Based Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filter Name P INS FOCF SETUP pfocf file NODEFAULT FIMS Focal Plane Setup File p_focf A name INS GRIS NAME Table 11 NODEFAULT Grism P FORS Template Manual VLT MAN ESO 13100 2309 31 FORS2_mxu cal daycalib MXU spectroscopic screen flatfield and wavelength calibration
28. FORS2_Iss_obs_slit_fast FORS2_Iss_obs_off_fast LSS RRM FORS2_lss_acq_rrm FORS2_Iss_obs _slit_fast FORS2_lss_obs_off_fast SPECPHOT FORS2_specphot_acq fast FORS2_specphot obs_slit_fast FORS2_specphot_obs_exp fast MOS FIMS FORS2_mos_acq FORS2_mos_obs_slit FORS2_mos_obs_off IPOL FORS2_ipol_acq_fast FORS2_ipol_obs_off_fast IPOL RRM FORS2_ipol_acq rrm FORS2_ipol_obs_off fast PMOS FORS2_pmos_acq_fast FORS2_pmos_obs slit_fast FORS2_pmos_obs_off fast PMOS RRM FORS2_pmos_acq_rrm FORS2_pmos_ obs slit_fast FORS2_pmos_obs_off fast PMOS FIMS FORS2_pmos_ acq FORS2_pmos_obs slit FORS2_pmos obs_off MXU FIMS FORS2_mxu_acq FORS2_mxu_obs slit FORS2_mxu_obs_off HIT I FORS2_hiti_acq fast FORS2_hiti slit_exp fast FORS2_hiti_obs_exp_fast HIT S FORS2_hits_acq_fast FORS2_hits _slit_ exp_fast FORS2_hits_obs_exp_fast HIT MS FORS2_hitms_acq FORS2_hitms slit_exp FORS2_hitms_obs_exp Slitless spectroscopy with FORS is treated as MOS observation with all slits open and mask prepa ration through FIMS 2 5 Calibration Templates The FORS calibration templates define the procedure and the parameters for the execution of cal ibration exposures Calibration templates will be executed during daytime only with telescope at zenith hence there must not be an acquisition template in a calibration OB The only exception from this rule are the sky flat calibration templates FORS2_img_cal_skyflat which are executed at twilight on the sky with the acquisition templat
29. FORS2_mos_cal_daycalib FIMS based MOS target acquisition MOS exposure through the slits MOS exposure with offset along the slit MOS spectroscopic screen flatfield and wavelength calibration FORS2_mxu_acq FORS2_mxu_obs_slit FORS2_mxu_obs_off FORS2_mxu_cal_daycalib FIMS based MXU target acquisition MXU mask exposure through the slits MXU mask exposure with offsets MXU spectroscopic screen flatfield and wavelength calibration FORS2_pmos_acq FORS2_pmos_obs_slit FORS2_pmos_obs_off FORS2_pmos_cal_daycalib FIMS based PMOS target acquisition FIMS based PMOS through slit exposure FIMS based PMOS exposure sequence with offset along the slit PMOS screen flatfield and wavelength calibration rotating the retarder plate FORS2_pmos_acq_fast FORS2_pmos_acq_rrm FORS2_pmos_obs_slit_fast FORS2_pmos_obs_off_fast FORS2_pmos_cal_daycalib_fast fast PMOS target acquisition RRM fast PMOS target acquisition PMOS through slit exposure PMOS exposure sequence with offset along the slit no FIMS PMOS screen flatfield and wavelenth calibration rotating the retarder plate FORS2_specphot_acq_fast FORS2_specphot_obs_slit_fast FORS2_specphot_obs_exp_fast FORS2_specphot_cal_daycalib fast wide slit spectrophotometry acquisition through slit exposure for spectrophotometry wide slit spectrophotometry exposure spectro photometric screen flatfield and wavelength calibration FORS2_hits_acq_fast FORS2_hits_slit_exp_fast
30. ILE Guide star RA and DEC are given in special P2PP entry fields NONE No guide star is to be selected Table 5 Guide star selection parameter for FORS2 in P2PP Further information is given in section 4 FORS Template Manual VLT MAN ESO 13100 2309 43 4 6 2 Exposure Types The FORS instruments produce 4 type of exposures science exposures standard star exposures pre imaging exposures and calibration exposures The 4 image types differ in some fits keyword parameters to support data organizers of reduction pipelines Table 6 lists the P2PP parameters to select science standard star and pre imaging exposures The exposure type for calibrations is implicitly defined by the template cal in template name P2PP entry Exposure type SCIENCE science exposure STANDARD standard star exposure PRE IMAGE pre images to trigger a fast data release in service mode Table 6 Exposure types of FORS2 in P2PP Note 1 calibration exposures are defined through the template type cal in template name 4 6 3 CCD Readout Modes The normal CCD setup modes for FORS2 are listed in table 7 Blue E2V P2PP entry CCD mode 100kHz 2x2 high fast 2x2 binned 2 port mode spectroscopy 200kHz 2x2 low very fast 2x2 binned 2 port mode imaging 100kHz 1x1 high unbinned mode for spectroscopic observations 200kHz 1x1 low unbinned imaging mode for special applications only for exam
31. ILT1 NAME Table 10 Filter Name P INS GBR SETUP FIMS MXU Mask Gerber Setup File A p gbr INS TARG SETUP FIMS Target Setup File p_targ A FORS2_hitms_slit_exp HIT MS spectroscopy through slit exposure Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 Exposure Time T INS FILT1 NAME Table 10 none Filter Name P INS FOCF SETUP FIMS Focal Plane Setup File p_focf A FORS2_hitms_obs_exp HIT MS spectroscopy exposure Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 0 1 Exposure Time T DET READ CLKIND HIT MS HIT MS CCD Read out Setup F SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion SEQ NEXPO 1 666 1 Number of Exp per Setup T TEL TARG OFFSETX 999 999 List of Tel Offsets in CCD X Direction T INS FILT1 NAME Table 10 Filter Name P INS FOCF SETUP FIMS Focal Plane Setup File p_focf A INS GRIS NAME XGRIS_600B 92 Grism P XGRIS_3001 91 FORS Template Manual VLT MAN ESO 13100 2309 36 FORS2_hitms_cal_scrflat HIT MS spectroscopy screen flatfield Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 1 100 0 0 1 Exposure Time T DET READ CLKIND HIT MS HIT MS CCD Read out Setup F SEQ NEXPO 1 666 1 Number of Exp per Setup T INS FILT1 NAME Table 10 Fi
32. Lamp HgCd 2 T INS2 LAMP3 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS2 LAMP4 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS2 LAMP5 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS2 LAMP6 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 2 T DET READ CLKIND Table 7 100kHz 2x2 high CCD Read out Setup P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO1 0 666 1 Number of Exp per Setup for scrflat T template SEQ NEXPO2 0 666 1 Number of Exp per Setup for wave tem T plate SEQ POL circular linear NODEFAULT Polarization Type P SEQ POL1 ANGLES Table 15 NODEFAULT List of Retarder Plate Settings for Arcs P SEQ POL2 ANGLES Table 15 NODEFAULT List of Retarder Plate Settings for Arcs P SEQ TIME1 0 25 100000 NODEFAULT Exposure Time for scrflat template T SEQ TIME2 0 25 100000 NODEFAULT Exposure Time for wave template T FORS Template Manual VLT MAN ESO 13100 2309 30 3 8 Multi Object Spectroscopy with masks MXU FORS2_mxu_acq FIMS based MXU target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET FIELD UIT1 0 25 100000 NODEFAULT Exp Time for Field Image T TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS
33. ME Table 10 NODEFAULT Filterl Name P FORS2_img_cal_skyflat Skyflat with automatic Exposure Time calculation Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 7 CCD Read out Setup P SEQ EXPLEVEL 0 65535 30000 Skyflat Mean Count Level T SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T TEL TARG OFFSETALPHA 999 999 10 List of Tel Offsets in RA T TEL TARG OFFSETDELTA 999 999 10 List of Tel Offsets in DEC T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P FORS Template Manual VLT MAN ESO 13100 2309 17 FORS2_img_cal_scrflat Imaging screen flatfield Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ NEXPO 1 666 1 Number of Exp per Setup T INS FILT1 NAME Table 10 NODEFAULT Filter Name P INS LAMP1 TIME 1 0 100000 1 Switch on Time Lamp FlatBlue 1 T INS LAMP2 TIME 1 0 100000 1 Switch on Time Lamp FlatBlue 2 T INS LAMP5 NAID FlatBlue 3 FlatBlue 3 External lamp P FlatBlue 4 INS LAMP5 TIME 1 0 100000 0 Switch on Time External Lamp T DPR CATG CALIB SCI CALIB Data Prod Categ P ENCE TEST FORS Template Manual VLT MAN ESO 13100 2309 18 3 2 2 Imaging with Occulting Bars OCC FORS2 img acq_algn FIMS based imaging target acquisition Parameters to be specifi
34. S Table 15 NODEFAULT List of Retarder Plate Settings P TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS FOCF SETUP p_focf file NODEFAULT FIMS Focal Plane Setup File p_focf A name INS GRIS NAME Table 11 NODEFAULT Grism P INS WOLL NAID WOLL_344 13 WOLL_34 13 Wollaston Prism F FORS Template Manual VLT MAN ESO 13100 2309 27 FORS2_pmos cal daycalib PMOS screen flatfield and wavelength calibration rotating the retarder plate Parameters to be specified Parameter Range Default P2PP Label Entry INS1 FILT1 NAME Table 10 NODEFAULT Filterl Name P INS1 FOCF SETUP NODEFAULT FIMS Focal Plane Setup File p_focf A INS1 GRIS NAME Table 11 NODEFAULT GRISM P INS1 LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS1 LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS1 LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS1 LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS1 LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp P FlatBlue 4 INS1 LAMP5 TIME 1 100000 0 Switch on Time External Lamp INS1 LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp FlatRed 4 INS1 LAMP6 TIME 1 100000 0 Switch on Time External Lamp T INS1 WOLL NAID WOLL_344 13 WOLL_34 13 Wollaston Prism F INS2 LAMP1 TIME 1 100000 NODEFAULT Switch on Time Lamp He 1 T INS2 LAMP2 TIME 1 1000
35. S Table 15 NODEFAULT List of Retarder Plate Settings P TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS GRIS NAME Table 11 NODEFAULT Grism P INS SLIT WID 0 2 30 0 NODEFAULT MOS Slit Width arcsec T INS WOLL NAID WOLL_344 13 WOLL_34 13 Wollaston Prism T FORS Template Manual VLT MAN ESO 13100 2309 29 FORS2_pmos_cal_daycalib_fast PMOS screen flatfield and wavelength calibration rotating the retarder plate Parameters to be specified Parameter Range Default P2PP Label Entry INS1 FILT1 NAME Table 10 NODEFAULT Filterl Name P INS1 GRIS NAME Table 11 NODEFAULT GRISM P INS1 LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS1 LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS1 LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS1 LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS1 LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp P FlatBlue 4 INS1 LAMP5 TIME 1 100000 0 Switch on Time External Lamp T INS1 LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp P FlatRed 4 INS1 LAMP6 TIME 1 100000 0 Switch on Time External Lamp T INS1 MOS10 WID 0 2 30 NODEFAULT Slit Width in arcseconds T INS1 WOLL NAID WOLL_34 13 WOLL_34 13 Wollaston Prism F INS2 LAMP1 TIME 1 100000 NODEFAULT Switch on Time Lamp He 1 T INS2 LAMP2 TIME 1 100000 NODEFAULT Switch on Time
36. TUP FIMS Focal Plane Setup File p_focf A INS1 GRIS NAME Table 11 NODEFAULT GRISM P INS1 LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS1 LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS1 LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS1 LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS1 LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp T FlatBlue 4 INS1 LAMP5 TIME 1 100000 0 Switch on Time External Lamp INS1 LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp FlatRed 4 INS1 LAMP6 TIME 1 100000 0 Switch on Time External Lamp T INS2 LAMP1 TIME 1 100000 NODEFAULT Switch on Time Lamp He 1 T INS2 LAMP2 TIME 1 100000 NODEFAULT Switch on Time Lamp HgCd 2 T INS2 LAMP3 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 1 T INS2 LAMP4 TIME 1 100000 NODEFAULT Switch on Time Lamp Ar 2 T INS2 LAMP5 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 1 T INS2 LAMP6 TIME 1 100000 NODEFAULT Switch on Time Lamp Ne 2 T DET READ CLKIND Table 7 100kHz 2x2 high CCD Read out Setup P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO1 0 666 1 Number of Exp per Setup for scrflat T template SEQ NEXPO2 0 666 1 Number of Exp per Setup for wave tem T plate SEQ TIME1 0 25 100000 Exposure Time for scrflat template T SEQ TIME2 0 25 100000 Exposure Time for wave template T Hidden parameters Parameter Range Default Function Entry
37. ULT FIMS Target Setup File p_targ A name SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_mos_obs_slit MOS through slit exposure FIMS based Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T INS FOCF SETUP p_focf file NODEFAULT FIMS Focal Plane setup File p_focf A name INS FILT1 NAME Table 10 NODEFAULT Filter1l Name P FORS2 mos obs off MOS exposure with offset along the slit FIMS based Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion TEL TARG OFFSETY 999 999 0 List of Tel Offsets in CCD Y Direction T INS FILT1 NAME Table 10 NODEFAULT Filter1l Name P INS GRIS NAME Table 11 NODEFAULT Grism P INS FOCF SETUP p_focf file NODEFAULT FIMS Focal Plane Setup File p_focf A name FORS Template Manual VLT MAN ESO 13100 2309 22 FORS2_mos_cal_daycalib MOS spectroscopic screen flatfield and wavelength calibration FIMS based Parameters to be specified Parameter Range Default P2PP Label Entry INS1 FILT1 NAME Table 10 NODEFAULT Filterl Name P INS1 FOCF SE
38. are appropriate for automatic data reduction The third option PRE IMAGE was introduced for projects which have requested pre images in the proposal To simplify the fast data release all such pre images should be prepared with the observation category set to PRE IMAGE Default is SCIENCE except for the template FORS2_specphot_obs_exp_fast in which it is set to STANDARD For calibration exposures the corresponding keywords are automatically written by the templates and no entry field needs to be set Number of Exp per Setup the number of exposures to be taken for a given instrument setup This number of exposures will be taken at each telescope offset position and for each instrument setup for instance for each retarder plate angle defined in the respective template Default is 1 Number of Exp per Setup amp Offset the number of exposures to be taken at a given instrument and telescope setting This number of exposures will be taken at each telescope offset position and for each instrument setup for instance for each retarder plate angle defined in the respective template Default is 1 Number of Tel Offsets number of offsets in right ascension and declination on the sky This parameter corresponds to the entry fields List of Tel Offsets in RA DEC If no telescope offset is foreseen this parameter should be set to 1 and the list of offset values should contain 0 Default is 1 Number of Tel Offsets in CCD Y Direction number of
39. bration observation An OB contains a Target Package TP which tells the telescope where to go an Acquisition Template AT which tells the system how to go and an Observation Description OD which tells the system what to do once in position The OD in turn may contain several templates the true unit of observation In service mode OBs contain also a Constraint Set CS OBs are executed by BOB the Broker for Observation Blocks It sends commands to the Observation Software OS which then redistributes them to the instrument ICS detector DCS and telescope TCS control sofware This forms the VLT Control Software VCS Advance preparation of your OBs can optimize the use of the telescope by minimizing overheads Investigators asking for service observing will have to submit a set of fully defined OBs to be executed under certain conditions whereas visitors can prepare a few typical OBs and will have more flexibility at the telescope to modify and adapt them to their immediate needs OBs are created and edited with the P2PP Phase 2 Proposal Preparation following the general P2PP architecture two types of Observation Blocks can be specified ObsBlocks night time observations science and standard star exposures CalBlocks day time calibrations bias darks screen flats arcs Night time ObsBlocks consist of the target information a single acquisition template and the observation description OD with a small
40. bservations of the coming night The broad band filters will be at any time in place at the position given by the standard instrument configuration 4 4 1 Internal arc lamps The values are still to be defined by the users according to the recommended values in chapter 4 of the user manual Most users won t have to send calibration OBs since the observatory staff perform this task for all standard observation modes the calibration plan As a general hint Ne lamps are bad for spectral resolution of much less than 1000 HgCd and He are to be used for all observations at wavelengths shorter then 600nm Switch on Time Lamp He 1 the switch on time of lamp He 1 in seconds Default is NODE FAULT i e user entry is expected here 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp HgCd 2 the switch on time of lamp HgCd 2 in seconds Default is NODEFAULT i e user entry is expected here 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp Ar 1 is on the switch on time of lamp Ar 1 in seconds Default is NODEFAULT i e user entry is expected here 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp Ar 2 is on the switch on time of lamp Ar 2 in seconds Default is NODEFAULT i e user entry is expected here 1 to be used to switch on the lamp continuously during the shutter open time Switch on T
41. cussed in the FIMS manual Here we only remind the users that the reference stars for any fims mode should be well distributed in the field to get the base line to determine the rotation offset The distribution of reference stars should be in some way similar to the distribution of targets in the field to minimize problems with residual field distortion or residual scale offset which will be not corrected by the software Y position of the target in fast LSS and SPECPHOT mode The target will be in the center of the field of view which will fall approximately on y pixel 260 unbinned of the upper master CCD The Y pixel of the target before dithering will be given in fits keyword CRPIX2 2 4 Science and Through Slit Templates The FORS science templates define the procedure and the parameters for the execution of science exposures on the night sky Science templates of a given observing mode can only be combined with the corresponding acquisition template of the same observing mode The association of acquisition and science templates is summarized below section 2 4 3 Several science templates with the same observing mode can be combined in the one science OB In the case of FORS the observation templates can be grouped into science and through slit templates The science template will deliver the science data the through slit templates are used to verify the proper target acquisition and to execute blind offsets in the case fast m
42. d order in the tables below the keywords are ordered as follows 1 DET keywords parameters for CCD setup and exposure time 2 SEQ keywords Sequence keywords for series of exposures retarder plate angles telescope offsets etc 3 TEL keywords parameters for telescope preset guiding etc 4 INS keywords parameters for instrument setup Selection and entry options for the keywords different selection and entry options exist for the actual value of the keyword entered by the user in the template form e single value in Range column keyword parameter is fixed No user modification is possible F fixed in column Entry e list of values in Range column several predefined named values for the keyword are possible Selection of the actual ones for template execution is done via a pull down menu P pull down menu in column Entry e range of values in Range column the actual value should fall within a wider range of possible values indicated by for instance 0 25 100000 0 The actual one to be used for the template execution has to be entered by typing T type in column Entry e file name in column Range a file name should be attached to this entry field This option deals with the attachment of the FIMS output files to the templates AT Attach file in column Entry An empty P2PP entry field indicates that user input is required Depending on the keyword
43. e FORS2_hiti_acq_fast FORS2_hiti_slit_exp_fast FORS2_hiti_obs_exp_fast FORS2_hiti_cal_Scrflat_fast fast HIT imaging acquisition HIT imaging exposure through the slit HIT imaging science exposure HIT imaging screen flat calibration Table 2 A list of all acquisition science and calibration templates for imaging modes default value in almost all cases Hidden parameters cannot be modified and will not appear at any place in p2pp 2 3 Acquisition Templates The prime goal of the acquisition templates is the positioning of user defined objects to user defined positions eg slits in the focal plane of the instrument The acquisition templates contain keywords related to the targets the telescope and instrument setup and some mode specific options for the target acquisition sequence The execution sequence of FORS acquisition templates has two phases the preset to and the fine positioning of the target field It has the following execution steps FORS Template Manual VLT MAN ESO 13100 2309 FORS2_1lss_acq_fast FORS2_1lss_acq_rrm FORS2_1ss_obs_slit_fast FORS2_1s5s_obs_ off fast FORS2_1s5s_cal_daycalib fast longslit spectroscopy target acquisition RRM fast longslit spectroscopy target acquisition through slit longslit exposure longslit spectroscopy with offsets along the slit longslit spectroscopic screen flatfield and wavelength calibration FORS2_mos_acq FORS2_mos_obs_slit FORS2_mos_obs_off
44. e 10 NODEFAULT Filterl Name P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS Template Manual VLT MAN ESO 13100 2309 28 FORS2_pmos_acq_rrm RRM PMOS target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO 1 666 1 Number of Exp per Setup T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P FORS2_pmos_obs_slit_fast PMOS through slit exposure fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T TEL TARG OFFSETALPHA 60 60 0 Blind Offset RA T TEL TARG OFFSETDELTA 60 60 0 Blind Offset DEC T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS SLIT WID 0 2 30 0 NODEFAULT MOS Slit Width arcsec T FORS2_pmos_obs_off_fast PMOS exposure sequence with offset along the slit Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets in CCD Y Direc T tion SEQ POL circular linear NODEFAULT Polarization Type P SEQ POL ANGLE
45. e longslit 0 4 arcsec wide longslit 0 5 arcsec wide longslit 0 7 arcsec wide longslit 1 0 arcsec wide longslit 1 3 arcsec wide longslit 1 6 arcsec wide longslit 2 0 arcsec wide longslit 2 5 arcsec wide longslit Table 12 The FORS2 longslits in P2PP P2PP entry predefined MOS slit position LSS_0 3_arcsec LSS_0 4_arcsec LSS_0 5_arcsec LSS_0 7_arcsec LSS_1 0_arcsec LSS_1 3_arcsec LSS_1 6_arcsec LSS_2 0_arcsec LSS_2 5_arcsec MOS slits at position of 0 3 arcsec longslit MOS slits at position of 0 4 arcsec longslit MOS slits at position of 0 5 arcsec longslit MOS slits at position of 0 7 arcsec longslit MOS slits at position of 1 0 arcsec longslit MOS slits at position of 1 3 arcsec longslit MOS slits at position of 1 7 arcsec longslit MOS slits at position of 2 0 arcsec longslit MOS slits at position of 2 5 arcsec longslit P2PP entry user defined MOS slit position MO center MOS_center offset MOS_center offset MOS slits in center of MOS area MOS slits at positive X pixel offset from MOS center MOS slits at negative X pixel offset from MOS center Table 13 The FORS MOS slits in P2PP used by SPECPHOT templates 46 FORS Template Manual VLT MAN ESO 13100 2309 P2PP entry Polarimetry mode linear Linear polarimetry circular Circular polarimetry Table 14 Polarimetry options in P2PP P2PP entry Longslit clear list empty list cir 45 circular p
46. ed Parameter Range Default P2PP Label Entry SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one DET FIELD UIT1 0 25 100000 NODEFAULT Exposure Time for Field Image T TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS TARG SETUP p targ file NODEFAULT FIMS Target Setup File p_targ A name FORS2 img occ crsplit Imaging with occultation mask of MOS slitarms Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE SCIENCE Observation Category P STANDARD PRE IMAGE SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ NOFF 1 100 1 Number of Tel Offsets T TEL TARG OFFSETALPHA 999 999 0 List of Tel Offsets in RA T TEL TARG OFFSETDELTA 999 999 0 List of Tel Offsets in DEC T INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS FOCF SETUP p_focf file NODEFAULT FIMS Focal Plane Setup File p_focf A name FORS Template Manual VLT MAN ESO 13100 2309 19 3 3 Longslit Spectroscopy LSS FORS2_Iss_acq_fast Fast LSS spectroscopy target acquisi
47. es FORS2_img_acq The following types of calibration templates exist generic templates for the CCD characterization bias and dark calibrations templates for screen flatfield and arc exposures and the special automatic twilight flat field template Furthermore a special template FORS2_img cal_coll is provided to select the collimator at the start of a calibration OB This template must be inserted as the first template of any daytime calibration OB It should never be used in science OBs It is useful to point out that normally spectroscopic screen flats and arc frames for the same set up are executed within a single template with the suffix daycalib Bias and Dark execution sequence 1 perform setup of CCD detector 2 take one or several exposures with the same CCD setting FORS Template Manual VLT MAN ESO 13100 2309 Exposure times for flat field templates Screen flat and arc execution sequence 1 2 switch on calibration lamps of the instrument insert MOS mask filters retarder plate polarimetry only grism in light path perform setup of CCD detector take a series of exposures with the same CCD setting polarimetry only move retarder plate to next position angle repeat steps 4 to 5 until user defined number of exposures at all retarder plate angles polarimetry only are taken 13 The users should not change the default values for the daytime
48. exposure to be chosen from the list in section in table 4 The LADC is set for air mass of the mid exposure time of the template Default is COORD P2PP entry LADC setting COORD setting according to coordinates and elevation of mid exposure time de fault ACTUAL setting according to coordinates and elevation of actual time of template start ZENITH setting for zenith position LADC closed ABSPOS user defined explicit setting of LADC to be entered through the tele scope control console it cannot be specified through P2PP NONE no LADC setting done LADC stays in current position Table 4 The LADC settings in P2PP Filter2 Name combinations of two filters are not supported To purchase a edge cutoff interference filter is the more economical choice 4 6 Pull Down Menus Within P2PP the various templates acquisition science calibration make use of a set of pull down menus to define the parameter setups of the CCD LADC filter grism MOS for spectrophotometry and longslit for the individual instrument telescope configurations The following sections describe the content of the pull down menus 4 6 1 Telescope Parameters The telescope software supports different options for the selection of guide stars see table 5 This parameter is selected in the P2PP entry field Get Guide Star from P2PP entry Guide star selection option CATALOGUE Select guide star from a telescope catalog SETUPF
49. gslit LSS multi object MOS mask mode MXU as well as for spectrophotometry specphot and for spectropolarimetry PMOS The user is reminded that for PMOS MXU and MOS modes with FORS2 only the standard resolution collimator SR is supported 4 6 7 Longslit selection The longslits listed in table 12 can be selected for longslit LSS spectroscopy with both the SR and HR collimators 4 6 8 MOS slit position selection for spectrophotometry Table 13 contains the list of options for predefined x positions of the MOS slits during the execution of the spectrophotometric templates SPECPHOT type The positions correspond to the pre defined positions of the MOS slits in the field of view This can be optionally the x position of the subsequent longslits or any other user defined x offset in units of pixels on the CCD The slit width is pre defined to 5 arcsec 4 6 9 Retarder plate angle for circular and linear polarimetry The polarimetry modes IPOL and PMOS use named positions for the setup of the rotation angle for the linear and circular retarder plate The selection options for the polarimetry modes are given in table 14 Table 15 lists the available options The number in the named positions gives the retarder plate angle lin and cir denote the polarization type linear and circular The named positions appear in a pull down field which is used to select the retarder plate angle for polarimetry exposures They can be added to
50. h slit images are add to the OB The target acquisition is done on the reference star the 1st through slit is done on the reference star and the blind offset executed at the end of the 1st through slit image short integration times The 2nd through slit is then executed with the target on the slit long integration and offset equal zero Here an example of the templates to be attached to an OB for the double save blind offset acquisition in long slit mode FORS2_lss_acq_fast target acquisition FORS2_lss_obs_slit_fast through slit image on reference star Aa Ad 4 0 FORS2_lss_obs_slit_fast through slit image on the target Aa Ad 0 FORS2_lss_obs_off_fast science exposures Blind acquisition on point sources another save method If the coordinates of the target and a reference star close to the target are both very well known it is fast and safe to calculate the rotator offset angle to have both the target and the reference star on the slit The target acquisition can be then done on the reference star without offsetting Two distant targets on 1 longslit There is no possibility to adjust the instrument rotation in due time As a consequence the fast acquisitions would require a close to perfect astrometry by the FORS Template Manual VLT MAN ESO 13100 2309 11 users and a close to perfect calibration of the instrument rotator offset angle Therefore it will be far better to select observation mode MOS in cases that angle between the targets is
51. he names of P2PP entry fields For any keyword an allowed range and a default value is defined The keywords themselves are not visible from P2PP The tables in section 3 list separately for each OB the keywords names their value range and defaults together with the P2PP name as shown in the view panel of P2PP In general only the keywords which will be in status NODEFAULT have to be set be the users while the keywords already set to default values should remain at the original FORS Template Manual VLT MAN ESO 13100 2309 template name short description FORS2_img_cal_coll FORS2_img_cal_bias FORS2_img_cal_dark select collimator for calibration exposures bias exposure dark exposure FORS2_img_acq FORS2_img_acq_rrm FORS2_img_obs_crsplit FORS2_img_cal_scrflat FORS2_img_cal_skyflat fast normal imaging target acquisition RRM imaging target acquisition multiple imaging exposure with offsets imaging screen flatfield sky flat with automatic exposure time calculation and offsets on the sky FORS2_img_acq_align FORS2_img_occ_crsplit FIMS based accurate imaging target acquisition imaging with occultation mask of MOS slit arms FORS2_ipol_acq_fast FORS2_ipol_acq_rrm FORS2_ipol_obs_off_fast FORS2_ipol_obs_scrflat_fast fast IPOL target acquisition RRM fast IPOL target acquisition IPOL sequence with offset in Y rotating the retarder plate IPOL screen flat sequence rotating the retarder plat
52. ime Lamp Ne 1 is on the switch on time of lamp Ne 1 in seconds Default is NODEFAULT i e user entry is expected here 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp Ne 2 is on the switch on time of lamp Ne 2 in seconds Default is NODEFAULT i e user entry is expected here 1 to be used to switch on the lamp continuously during the shutter open time FORS Template Manual VLT MAN ESO 13100 2309 Al 4 4 2 Internal flat field lamps The default values should not be changed by the users as they have been optimized by the observatory staff Switch on Time Lamp FlatBlue 1 the switch on time of lamp FlatBlue 1 in seconds Default is 1 permanently switched on 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp FlatBlue 2 the switch on time of lamp FlatBlue 1 in seconds Default is 1 permanently switched on 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp FlatRed 1 the switch on time of lamp FlatRed 1 in seconds Default is 1 permanently switched on 1 to be used to switch on the lamp continuously during the shutter open time Switch on Time Lamp FlatRed 2 the switch on time of lamp FlatRed 2 in seconds Default is 1 permanently switched on 1 to be used to switch on the lamp continuously during the shutter open time 4 4 3 External flat field lamps of the new calibration
53. ing in declination for instance for moving objects The value is given in arcsec s on the sky Default is 0 arcsec s Get Guide Star from source from which the coordinates for the guide star are taken It is actually not recommended to use any other option then the default value Three options exist e CATALOGUE the guide star coordinates are selected from a guide star catalog installed at the telescope HST Guide Star and USNO catalogs This is the default and most frequently used option SETUPFILE the coordinates are read from the subsequent entry fields of the acquisition template This option may be used if the user wants to specify a certain guide star to be used and it allows also to give guide stars not found in the catalogs of the telescope Note the guide star should be of brightness 11 13mag The outer radius for the guide star selection area is 7 4 arcmin from the field center the inner one is defined by the field size of the collimator used e NONE this options is used if no guide star shall be used for instance during twilight periods when it will be difficult to find one since the sky is too bright In that case the telescope tracks with sidereal track rate Guide Star RA the right ascension of the user selected guide star in hh mm ss Equinox is J2000 default is 0 00 00 00 000 Guide Star DEC the declination of the user selected guide star in dd mm ss Equinox is J2000 default is 0 00 00 00 000 FORS Template Manua
54. isition and science templates fast incl RRM and FIMS based option are usually consid ered as separate observing modes of FORS They thus have separate templates for target acquisition science observation and day time calibrations In general the FIMS based and fast mode templates cannot be mixed in a single OB and the few exceptions are to be discussed with the observatory staff 2 2 2 Template Types Three template types are used with FORS target acquisition templates science observation templates and day time calibration templates The following naming convention is normally used lt mode gt gives the observing mode used see Table 1 xxx indicates the option of the respective mode fast for fast mode all others are FIMS based Acquisition Templates FORS2_ lt mode gt _acq_xxx Calibration Templates FORS2_ lt mode gt calxxx Observation Templates FORS2_ lt mode gt _obs_xxx In a few cases we still break this naming scheme like for the occulting bar imaging or deviate slightly from the scheme but you will find a cross identification list between acquisition and science observation templates below in Tables 2 amp 3 2 2 3 Template Keywords The parameters of the templates and the respective observations are to be specified in the template specific list of keywords The keywords correspond to functionalities for instance setups of the instrument telescope preset supported by the templates Within P2PP the keywords are designated by t
55. l VLT MAN ESO 13100 2309 39 List of Tel Offsets in RA a list of telescope right ascension RA offsets in arcsec which will be executed step by step during the jitter sequence The first offset step is performed before the start of the first exposure The offsets are executed sequentially and relative to the last telescope position The offset values are separated by spaces The number of offsets done during the jitter sequence is defined by the entry field Number of offsets If the number of offset values in the list is smaller than Number of offsets the list of offset values will be repeated until the number of offsets is equal to the requested Number of offset This parameter corresponds to entry field number of offsets Default is 0 arcsec List of Tel Offsets in DEC a list of telescope declination DEC offsets in arcsec which will be executed step by step during the jitter sequence The first offset step is performed before the start of the first exposure The offsets are executed sequentially and relative to the last telescope position The offset values are separated by spaces The number of offsets done during the jitter sequence is defined by the entry field Number of offsets If the number of offset values in the list is smaller than Number of offsets the list of offset values will be repeated until the number of offsets is equal to the requested Number of offsets This parameter corresponds to entry field number of offsets Default is
56. lates included 2 7 Jul 12 2004 all RRM templates included 3 Jan 10 2005 none Version number changed for consistency 3 Aug 30 2005 none P77 no change 4 Jan 25 2006 none Included 1200B grism for FORS1 4 Mar 03 2006 none P78 release 4 Jun 09 2006 none updates for new HIT MS templates 78 Jun 26 2006 all new standardised format 79 Sep 01 2006 none P79 no change 79 Jan 28 2007 2 FORS1 CCD upgrade 80 Jun 30 2007 all P80 fine tuning of FORS1 CCD upgrade 81 Dec 19 2007 all P81 updated daycalib templates and links 82 Jun 24 2008 none P82 no change 83 Nov 06 2008 all P83 updated for merger Polarimetry now on FORS2 Option for red MIT or blue E2V ccd 84 Jul 15 2009 P84 no change 85 Dec 20 2009 P85 clarified offsets in Sec 2 4 2 86 June 22 2010 P86 no change ili FORS Template Manual VLT MAN ESO 13100 2309 This page was intentionally left blank lv FORS Template Manual VLT MAN ESO 13100 2309 Contents 1 Introduction EO BONO fans Bee BP is Se ee ee AR E ds eee a G 12 Contact Inforraeti on 6 2 d ace A ae ewe RR ee ee we a 1 3 Changes im this edition rss ced Te toma ao Edo EO AEN e ew ee a Ae LA Acknowledment 4 64632606 4 bee haw bea ek eee bees oe AE ES 1 5 Abbreviations and Acronyms NNN 2 FORS Templates 2 1 Introduction Observation Blocks Templates Keywords 2 2 FORS Templates Acquisition Science and Calibration
57. lter Name P INS FOCF SETUP FIMS Focal Plane Setup File p_focf A INS GRIS NAME XGRIS_600B 92 Grism P XGRIS_3001 91 INS LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp P FlatBlue 4 INS LAMP5 TIME 1 100000 0 Switch on Time External Lamp T INS LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp P FlatRed 4 INS LAMP6 TIME 1 100000 0 Switch on Time External Lamp T FORS2_hitms_cal_wave HIT MS spectroscopy wavelength calibration Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 1 100 0 0 1 Exposure Time T DET READ CLKIND HIT MS HIT MS CCD Read out Setup F SEQ NEXPO 1 666 1 Number of Exp per Setup T INS FILT1 NAME Table 10 none Filter Name P INS FOCF SETUP FIMS Focal Plane Setup File p_focf A INS GRIS NAME XGRIS_600B 92 Grism P XGRIS_3001 91 INS LAMP1 TIME 1 100000 Switch on Time Lamp He 1 T INS LAMP2 TIME 1 100000 Switch on Time Lamp HgCd 2 T INS LAMP3 TIME 1 100000 Switch on Time Lamp Ar 1 T INS LAMP4 TIME 1 100000 Switch on Time Lamp Ar 2 T INS LAMP5 TIME 1 100000 Switch on Time Lamp Ne 1 T INS LAMP6 TIME 1 100000 Switch on Time Lamp Ne 2 T FORS Template Manual VLT MAN ESO 13100 2309 37 4 Explanations of the P2PP Entry Fields The following lis
58. meter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T DET READ CLKIND Table 7 CCD Read out Setup P SEQ CATG SCIENCE STANDARD Observation Category P STANDARD SEQ NEXPO 1 666 1 Number of Exp per Setup amp Offset T SEQ SPEC OFFSET 0 1000 1600 500 MOS Slit Offset Amplitude T SEQ SPEC TARG Table 13 MO center MOS Slit Position Set To P INS FILT1 NAME Table 10 NODEFAULT Filter1l Name P INS GRIS NAME Table 11 NODEFAULT Grism P INS SLIT WID 5 0 5 0 MOS Slit Width arcsec T FORS Template Manual VLT MAN ESO 13100 2309 24 FORS2_specphot_cal_daycalib Spectro photometric screen flatfield and wavelength calibration Parameters to be specified Parameter Range Default P2PP Label Entry INS1 FILT1 NAME Table 10 NODEFAULT Filterl Name P INS1 GRIS NAME Table 11 NODEFAULT GRISM P INS1 LAMP1 TIME 1 100000 1 Switch on Time Lamp FlatBlue 1 T INS1 LAMP2 TIME 1 100000 1 Switch on Time Lamp FlatBlue 2 T INS1 LAMP3 TIME 1 100000 1 Switch on Time Lamp FlatRed 1 T INS1 LAMP4 TIME 1 100000 1 Switch on Time Lamp FlatRed 2 T INS1 LAMP5 NAID FlatBlue 3 FlatBlue 3 External Lamp P FlatBlue 4 INS1 LAMP5 TIME 1 100000 0 Switch on Time External Lamp INS1 LAMP6 NAID FlatRed 3 FlatRed 3 External Lamp FlatRed 4 INS1 LAMP6 TIME 1 100000 0 Switch on Time External Lamp T INS1 SLIT WID 1 0 1 0 MOS Specphot Slit Width arcsec T INS2 LAMP1 TIME 1 100000
59. much larger then 1 arcminute 2 4 2 Science exposure templates The science exposure templates allow the execution of science exposures like filter images and spectra of the target field The templates perform instrument setups telescope offsets and sequences of science exposures FORS science observation sequence 1 check for telescope guiding and active optics 2 perform first telescope offset relative to start position 3 perform setup of instrument slits filters grism retarder plate etc 4 take NEXP exposures at the actual offset position 5 for polarimetry only move retarder plate to next angle 6 for polarimetry only take NEXP exposures for the actual retarder plate setup and offset position 7 for polarimetry only repeat steps 5 and 6 until user defined list of retarder plate settings is finished 8 perform the next telescope offsets from the user defined list relative to last position 9 repeat steps 3 to 8 until user defined number of exposures at all NOFF offset positions and all retarder plate angles polarimetry only are taken 10 offset the telescope back to start position Number and order of exposures taken in the sequence In the science exposure sequence NEXP exposures will be taken at NOFF offset positions Finally NEXP NOFF images will be taken In the polarimetric modes the NEXP exposures will be taken at each retarder plate setting before offsetting to the next offset position
60. nal 5 execute telescope offset and change exposure time for next acquisition cycle if needed 6 repeat steps 3 to 5 until slit positioning is ok 7 for fast option of LSS PMOS HIT I HIT S after slit positioning is accomplished perform user defined blind offset from the reference star to the target blind offset mode only Blind offsets The through slit templates for the fast mode except SPECPHOT and RRM modes can execute blind offsets from a brighter reference star to a faint science target at the end of the slit alignment process The blind offsets are executed after the reference star is properly acquired in the slit i e at the end of the through slit templates Therefore the coordinates of the reference star must be given as target information while the blind offset from the reference star to the target must be specified as the blind offset in the through slit template The signs of coordinate and rotation offset are indicated in figure 2 3 1 The size of offsets given on the sky in the sense that 10 in RA is always 80 pixels unbinned for SR mode and 0 125 pixel no matter which DEC Reference stars for blind offset acquisitions should be selected as close as possible to the target since rotation and image scale of the input coordinates and the FORS CCD coordinates are not infinitely accurate Blind offsets a double save method The final position of the target on the slit can be verified if two throug
61. ode templates 2 4 1 Through slit templates The through slit templates allow the verification and fine adjustment of the slit positioning of the targets for spectroscopy and spectropolarimetry They perform a setup of the instrument and take Suppose the scale offset or field distortion of the input between input image and FORS acquisition image is 0 002 and all reference stars are selected in average 1000 pixels off the position of the slits all targets will be off by 2 pixels and most light will be lost FORS Template Manual VLT MAN ESO 13100 2309 9 Figure 1 Fast modes and blind offsets Offsets are defined from the reference star to the target Rotator offset angle minus position angle The blind offset is executed after the fine positioning of the reference star on the slit by the through slit templates FORS Template Manual VLT MAN ESO 13100 2309 10 through slit images which can be used to adjust the slit positioning of the targets through small telescope offsets The use of the through slit templates is mandatory for all spectroscopic observations and for the high time resolution imaging mode FORS through slit observation sequence 1 check for telescope guiding and active optics 2 perform setup of instrument slits plus filters retarder plate etc as requested by user 3 take through slit exposure 4 determine object slit position and offset for fine adjustment to be done by the observatory perso
62. of the FORS focal field during the exposure This file is generated by FIMS and is attached to the template within P2PP Since MXU p_focf files are very long only the name of the p focf file appears in the p2pp entry field while its content is hidden but still present The default content of this entry field is NODEFAULT i e user entry is expected here Collimator selection of the instrument collimator to be moved into the light path for the calibration Two options exist COLL_SR for the standard resolution collimator default and COLL_HR for the high resolution collimator Wollaston Prism the use of the Wollaston prism is mandatory for polarimetry observations Default and only setting WOLL_34 13 Grism the grism to be inserted for the exposure For the available grism see list in section 4 6 6 Default is NODEFAULT i e user entry is expected here Filter1 Name filter to be selected from the filter pull down menu see section 4 6 5 Since P2PP is an off line preparation tool it is not connected to the real database of the operational instrument so that it cannot verify the feasibility of the filter selection or if an interference filter is actually installed in the instrument Therefore in visitor mode a filter request has to be filled in at the site in order to make sure that the proper filters are mounted for the observations For service mode the observatory staff take care of this request considering by determining the likely o
63. offsets along Y pixel direction of the CCD This parameter corresponds to the entry field List of Tel Offsets in CCD Y Direction Default is 1 Skyflat Mean Count Level the mean ADU level for the sky flat exposures This parameter is used by template FORS2_img_cal_skyflat to calculate automatically the optimum exposure time for the sky flat exposures Default is 30000 ADU MOS Slit Position Set To the focal field position of the MOS slits used in the respective SPECPHOT templates for spectro photometric standard star observations Different named po FORS Template Manual VLT MAN ESO 13100 2309 38 sitions exist see table 13 defining the slit target position in the focal area Default is MOS_center which gives the position of the center of the MOS field X 1040 pixels in binning 2 MOS_center offset allows to position the target to an arbitrary offset position in X direction The offset from the MOS center in pixels is given in entry field MOS slit offset amplitude Using predefined named positions for the LSS slits the MOS slits can also be positioned to the X position of a user selected longslit MOS Slit Offset Amplitude CCD offset position in pixels of the slit target from the MOS field center as used for spectro photometric standard stars This entry field has effect only if MOS_center offset is chosen for the entry field MOS Slit Position Set To in the respective SPECPHOT templates Defaul
64. olarimetry retarder at 45 deg cir45 circular polarimetry retarder at 45 deg cir135 circular polarimetry retarder at 135 deg cir225 circular polarimetry retarder at 225 deg linO linear polarimetry retarder at 0 deg lin22 5 linear polarimetry retarder at 22 5 deg lin45 linear polarimetry retarder at 45 deg lin67 5 linear polarimetry retarder at 67 5 deg lin90 linear polarimetry retarder at 90 deg lin112 5 linear polarimetry retarder at 112 5 deg lin135 linear polarimetry retarder at 135 deg lin157 5 linear polarimetry retarder at 157 5 deg lin180 linear polarimetry retarder at 180 deg lin202 5 linear polarimetry retarder at 202 5 deg lin225 linear polarimetry retarder at 225 deg lin247 5 linear polarimetry retarder at 247 5 deg lin270 linear polarimetry retarder at 270 deg lin292 5 linear polarimetry retarder at 292 5 deg lin315 linear polarimetry retarder at 315 deg lin337 5 linear polarimetry retarder at 337 5 deg 47 Table 15 The retarder plate angles in P2PP the recommended default angles for the circular and linear polarimetry are highlighted P2PP entry Slit width HITS 0 5 900015 HITS 0 7 900016 HITS 1 0 900017 HITS 1 3 900018 HITS 1 6 900019 HITS_2_0 900020 HITS_5_0 900021 0 5 arcsec 0 7 arcsec 1 0 arcsec 1 3 arcsec 1 6 arcsec 2 0 arcsec 5 0 arcsec Table 16 The HIT masks in P2PP
65. omatic Target Preset this parameter decides on the non execution of the telescope preset only in right ascension and declination It has two values T for true F for False If set to T the telescope preset will be executed if set to F it will not be executed For a full telescope preset including right ascension declination and rotator this flag should be T Default is T Acquisition Method the acquisition method used during the fine positioning of the target field in the focal plane of the instrument Two options exist FORS Template Manual VLT MAN ESO 13100 2309 42 e Interactive this option allows the operator to interact with the control system during the alignment process in order to guide the acquisition sequence The operator interaction typically comprises confirmation of the alignment offset repetition of the alignment sequence if needed selection of reference stars if the automatic selection executed after each alignment image is taken fails Default and recommended mode for the field alignment is interactive e Automatic this options executes the alignment process completely automatically without any operator interaction A single alignment iteration will be executed This option is faster than the interactive mode but requires that the alignment process is safe and successful for instance it was verified interactively before It is not recommended to be used for normal acquisitions Preset LADC the LADC setup for the
66. ple IPOL on bright sources Red MIT P2PP entry CCD mode 100kHz 2x2 high fast 2x2 binned 2 port mode spectroscopy 200kHz 2x2 low very fast 2x2 binned 2 port mode imaging 200kHz 1x1 low very fast unbinned 2 port mode for special applications only Table 7 CCD modes supported by FORS2 in P2PP The default modes are highlighted The CCD clocking modes listed in table 8 can be selected for both the imaging and spectroscopy modes of the HIT mode HIT I and HIT S but are not applicable for the HIT MS mode P2PP entry Time taken to clock entire frame HIT OS1 1sec 1 HIT OS2 4sec 4 HIT OS3 16sec 16 HIT OS4 64sec 64 HIT OS5 256sec 256 Table 8 The HIT clocking speeds in P2PP 4 6 4 Collimator selection The collimator selection menu has two choices for each instrument see table 9 FORS Template Manual VLT MAN ESO 13100 2309 44 P2PP name Collimator COLL_SR 6 Standard resolution collimator COLL_HR 7 High resolution collimator Table 9 FORS2 collimators in P2PP 4 6 5 Filter selection The filter pull down menu offers the filters listed in table 10 If not part of the instrument standard configuration see FORS2 User s Manual the respective filters have to be requested for installation into the instrument via a special filter setup request form visitor mode observations only 4 6 6 Grism selection The grisms listed in table 11 can be selected for lon
67. py with masks HIT MS 0 2 0 0 4 Explanations of the P2PP Entry Fields 4 1 User defined P2PP entry fields DET keywords 4 4 2 User defined P2PP entry fields SEQ keywords 04 4 3 User defined P2PP entry fields TEL keywords 04 14 15 16 16 18 19 21 23 25 26 26 27 30 32 32 33 35 FORS Template Manual VLT MAN ESO 13100 2309 vi 4 4 User defined P2PP entry fields INS keywords 0004 39 44 1 Internal are lamps o c soa i oao os aa eaa a eR ae eS 40 4 4 2 Internal flat field lamps e 41 4 4 3 External flat field lamps of the new calibration units 41 4 0 Hidden P2PP parameters ss er ee we ye et wee AR EN a 41 db Pull Down Menus ic se ed eda SE Bae de AR a a a A 42 4 6 1 Telescope Parameters 2 ee ee 42 46 2 Expos re Ty GS corea roepa eh ee be we Be A Ss 43 46 3 COD Readout Modes sa eos rca bak be E eR ee hed eS 43 AGA Colimator selection A sacr 26 4 gbere a OG Re Ra ee RS 43 46 5 Filter selection EE netu dma daana o oS bee a A 44 AO Crista EEN aod son a ee ee AE wl Ya ea ee Be 44 AG Loneslit selection 22 4 oso eaa caa amaa rasa Re ee bes 44 4 6 8 MOS slit position selection for spectrophotometry 44 4 6 9 Retarder plate angle for circular and linear polarimetry 44 4 6 10 HITES mask Selection sa ei 4 be Ewe A ee ae oe oe ae Ow
68. r entry is expected here MOS Slit Width arcsec the width of the MOS slits in arcsec in the SPECPHOT PMOS and HIT I fast templates for spectro photometric standard stars the default value is set to 5 arcsecs FIMS Target Setup File p_targ the content of the FIMS target setup file p_targ for the field acquisition This file gives the center field coordinates and rotator angle for the telescope preset the reference target coordinates and the collimator to be used For MXU it also contains the MXU mask ID This file is generated by FIMS and is attached to the acquisition template within P2PP Since MXU ptarg files are very long only the name of the p_targ file appears in the P2PP entry field while its content is hidden but still present The default content of this entry field is NODEFAULT i e user entry is expected here FIMS MXU Mask Gerber Setup File p_gbr the content of the p_gbr file from FIMS which contains the information for punching the MXU mask This file is generated by FIMS and is attached to the acquisition template within P2PP Since MXU p _gbr files are very long only the name of the p gbr file appears in the p2pp entry field while its content is hidden but still present The default content of this entry field is NODEFAULT i e user entry is expected here FORS Template Manual VLT MAN ESO 13100 2309 40 FIMS Focal Plane Setup File p focf the FIMS file extension p_focf with the user defined configuration
69. rsor selection of the target for fine positioning fast option the ref erence star blind fast option or automatic measurement of reference stars for the field alignment and calculation of the required telescope offset FIMS based option 8 perform telescope offset if needed 9 repeat steps 6 to 8 if needed until the field alignment satisfies the requirements for the science observations 10 stop alignment process and end acquisition sequence Each step is descrived in detail in the next section 2 3 1 Functionality of the Acquisition Templates The target information is always used by the OT scheduling tool for service mode observations Therefore the target coordinates shall always be entered into the P2PP entry fields to ensure the proper scheduling of service mode observations Preset to target field the fast acquisition templates will read the coordinate and equinox of the target or the reference star in case of a fast blind acquisition from the target entry fields on the bottom of the p2pp window The offset from a reference star to the target fast mode templates excluding RRM requires that the user enters the coordinates of the reference stars into the target informations on the bottom of p2pp All FIMS based FORS observations will read the preset information as well as the coordinates of the reference stars and slits through the FIMS p_targ file attached to the acquisition templates Templa
70. selection of science observation templates The day time CalBlocks consist of a small selection of calibration templates but no acquisition templates Besides this constraint sets CS and scheduling information are requested in particular for the preparation of service more observations The target information and the constraint sets are not described below since they are general for all instruments and their description can be found in the P2PP manual Observation Description OD this defines the sequence of setups and exposures for scientific or calibration purposes It consists of one or more templates and the respective keywords If several templates are included their execution follows the sequence in the list This sequence can be modified at the telescope through BOB the Broker for OBs in the sense that the execution of any individual templates can be skipped paused or restarted 2 2 FORS Templates Acquisition Science and Calibration 2 2 1 FORS Observing Modes The FORS templates are specfic for a given observation mode see Table 1 Each mode has a specific set of templates for the acquisition science exposures and calibrations In most cases the templates of different modes cannot be mixed in one observation blocks Fast RRM and FIMS based observing modes Three groups of target acquisition templates are offered FIMS based modes which require mask preparations and the more simple fast modes All multi object observations
71. shifted by 6500 km s O III filter O III filter red shifted by 3000 km O III filter red shifted by 6000 km He I filter He I filter red shifted by 2500 km s He I filter red shifted by 5000 km s O I filter O I filter red shifted by 2500 km s O I filter red shifted by 4500 km s H Alpha filter H Alpha filter red shifted by 2500 km s H Alpha filter red shifted by 4500 km s S II filter S II filter red shifted by 2000 km s S II filter red shifted by 4500 km s S II filter S III filter red shifted by 1500 km s S III filter red shifted by 3000 km s night sky suppression filter night sky suppression filter night sky suppression filter night sky suppression filter Munich intermediate band filter Munich O III filter Munich O III filter red shifted by 1800 km s Special z band filter width 20nm Special z band filter width 6nm Table 10 FORS2 filters in P2PP Not all filters are installed in the instrument at any time 45 FORS Template Manual VLT MAN ESO 13100 2309 P2PP name normal grisms GRIS_1400V 18 GRIS_1200R 93 GRIS_1028z 29 GRIS_600B 22 GRIS_600V 94 GRIS_600RI 19 GRIS_6001 25 GRIS_600z 23 GRIS_300V 10 GRIS_300I 11 GRIS_1501 27 GRIS_1200B 97 Table 11 FORS2 grisms in P2PP P2PP entry Longslit 1SlitO_3arcsec 1SlitO_4arcsec 1Sl1it0_5arcsec 1S1it0_7arcsec 1S1it1_0arcsec 1S1it1_3arcsec 1Slit1_6arcsec 1Slit2_Oarcsec 1Slit2_5arcsec 0 3 arcsec wid
72. t contains a description of the P2PP entry fields of all FORS templates 4 1 User defined P2PP entry fields DET keywords Exposure Time the exposure time of an individual exposure in seconds Default is NODEFAULT i e user entry is expected here The shortest exposure time supported by the FORS shutter is 0 25s Exp Time for Field Image the exposure time of the acquisition image on the sky in seconds Default is NODEFAULT i e user entry is expected here The shortest exposure time supported by the FORS shutter is 0 25s Exp Time for Slit Image the exposure time of the reference slit exposure on the sky in seconds Default is NODEFAULT i e user entry is expected here The shortest exposure time supported by the FORS shutter is 0 25s CCD Read out Setup The CCD readout mode are in general set to the standard modes 200kHz 2x2 low for imaging and 100kHz 2x2 high for spectroscopy CCD windowing is no longer offered since the upgrade to mosaics in both instruments In addition to these standard modes a number of readout modes are supported for the HIT mode observations These can be found in Table 8 4 2 User defined P2PP entry fields SEQ keywords Observation Category the category of the exposure for night observations Three options exist SCIENCE for scientific exposure STANDARD for standard star exposure and PRE IMAGE for pre imaging exposure This parameter is used to write fits header keywords in the image file which
73. t is 500 pixels Polarization Type the retarder plate mosaic to be used for the polarimetry exposures Two mosaics are available 2 plate mosaic for linear polarimetry entry option linear and A 4 plate mosaic for circular polarimetry entry option circular The desired mosaic is selected from a pull down menu Default is NODEFAULT i e user entry is expected here List of Retarder Plate Settings the list of positions for the setting of the retarder plate angles The positions are chosen from a pull down list see table 15 Prefix lin indicates linear prefix cir circular polarimetry The options of the list are named positions i e they are specific for the polarimetry mode circular polarimetry needs to have position angle with prefix cir linear polarimetry those with prefix lin Default is NODEFAULT i e user entry is expected here 4 3 User defined P2PP entry fields TEL keywords Rotator on Sky PA on Sky the angle of the telescope rotator on the sky The angle is measured in deg North over West i e it has the opposite sign of the position angle as measured on the sky The values can range from 180 to 180 deg Default is 0 deg Additional Velocity RA the velocity of the non sidereal tracking auto guiding in right ascension for instance for moving objects The value is given in arcsec s on the sky Default is 0 arcsec s Additional Velocity DEC the velocity of the non sidereal auto guiding track
74. tes FORS2_ img acq and FORS2_img_acq_rrm will only preset the telescope to the field and stops after the execution of steps 1 to 4 while all other templates will continue with the fine positioning of targets on slits Proper motion Independent from the fact that earlier versions of p2pp have had entry fields for proper motion and epoch the coordinates have to be given at the actual epoch since there is no proper motion and epoch keyword in any of the FORS acquisition templates The target coordinates are only precessed from the user define equinox to the actual epoch Set up of FORS Collimator LADC besides the target acquisition the acquisition templates will FORS Template Manual VLT MAN ESO 13100 2309 8 also setup the FORS collimator and the LADC transparent to the user This is mainly done because of the long setup time of the collimator which will be done in the most economic way during tele scope preset This will have some impact for the preparation of calibration OBs FORS_img cal coll template required which will be discussed below Position angles and rotator offset angle In the actual configuration of the telescope and instrument the rotator offset angle has to be specified this is flipped in sign in respect of the position angle of the target on the sky rot angle PA FIMS will do it automatically right but be aware of this while using fast templates see figure 2 3 1 In addition to this a value of 9999
75. this input can be through file selection and attachment for instance the FIMS output files or through typing for instance exposure time Hidden parameters several templates contain so called hidden keywords These keywords are needed for the proper execution of the templates but they are not meant to be changed by the user Therefore they are hidden from the P2PP display i e no P2PP entry field is assigned to them but they appear in the exported version of the OB The values of hidden keywords cannot be modified by the user FORS Template Manual VLT MAN ESO 13100 2309 15 3 1 Collimator Selection Bias and Darks FORS2_img_cal_coll Select collimator for calibration exposures Parameters to be specified Parameter Range Default P2PP Label Entry INS COLL NAID COLL_SR 6 COLL_SR 6 Collimator P COLL_HR 7 Hidden parameters none FORS2_img_cal_bias Bias exposure Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 7 CCD Read out Setup P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one SEQ NEXPO 1 666 1 Number of Exp per Setup T FORS2_img_cal_ dark Dark exposure Parameters to be specified Parameter Range Default P2PP Label Entry DET READ CLKIND Table 7 CCD Read out Setup P DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ NEXPO 1 666 1 Number of Exp per Setup T
76. tion Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one TEL ROT OFFANGLE 180 0 4 180 0 0 Rotator on Sky PA on Sky T 9999 0 Parallactic angle TEL AG GUIDESTAR CATALOGUE CATALOGUE Get Guide Star from P SETUPFILE NONE TEL GS1 ALPHA Right Ascen 0 i e Guide Star RA T sion 00 00 00 0 TEL GS1 DELTA Declination 0 i e Guide Star DEC T 00 00 00 0 INS COLL NAID COLL_SR 6 COLL_S5SR 6 Collimator P COLL_HR 7 INS FILT1 NAME Table 10 NODEFAULT Filterl Name P INS SLIT NAID Table 12 NODEFAULT LSS Slit P FORS2_Iss_acq_rrm RRM LSS spectroscopy target acquisition Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T INS FILT1 NAME Table 10 NODEFAULT Filter1l Name P INS SLIT NAID Table 12 NODEFAULT LSS Slit P SEQ CCD BR ANY R Required CCD B Blue R Red ANY P Either one FORS2_lss_obs_slit_fast LSS Through slit exposure fast mode Parameters to be specified Parameter Range Default P2PP Label Entry DET WIN1 UIT1 0 25 100000 NODEFAULT Exposure Time T TEL TARG OFFSETALPHA 60 60 0 Blind Offset RA T TEL TARG OFFSETDELTA 60 60 0 Blind Offset DEC T INS FILT1 NAME Table 10 NODEFAULT Filter Name P INS SLIT NAID Table 12 NODEFAULT LSS Slit P FORS2_Iss_obs_off_fast LSS spectroscopy with offsets along the slit fast mode

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