14425( 2) - 19-Oct-2015 12:47:03 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14425 Version: 2 Check-in Time: 19-Oct-2015 12:47:03 STScI Edit Number: 1 Title STIS Focus + Parallel Measurements Cycle 23 ------------------------------------------------------------------------------------ Type Cycle CAL/STIS 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Charles R. Proffitt Space Telescope Science Institute Y CoI: Dr. Linda L. Dressel Space Telescope Science Institute N CoI: Dr. TalaWanda R Monroe Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract This proposal will repeat visit P2 of program 14063 to check the stability of the focus offset between the STIS/CCD, the ACS/WFC, and the WFC3/UVIS detectors Parallel observations will use STIS MIRVIS F28X50OII, WFC3 F410M, and ACS F502N A UV bright star will be observed with STIS while parallel observations are done of a rich star field using WFC3 and ACS. The filters are chosen to allow phase retrieval to estimate the focus and other optical parameters from the PSF images. Simultaneous parallel observations allow a differential measure of the focus offset between the two instruments without having to rely on the accuracy of the breathing model. A one orbit pointing will be done in the globular cluster 47 Tuc. The introduction of the narrow band OII filter does defocus the STIS CCD images, as the CCD image mode is optimized for a clear aperture, but the offsets measured in this visit can be compared with those seen in June 2016 in program 14063. ------------------------------------------------------------------------------------ Observations Description ------------------------ All visits have schedulability set to 100%. This program repeats Visit P2 of program 14063. Some minor changes were made to the exposure times from that program. All STIS OII ACCUM exposures are now 35 s long, and the ACS 502N observations were increased from 200 s to 360 s. The STIS target will be HD2702, a bright V=9 star located about 6' from the center of 47 Tuc. A STIS box dither pattern will be used to . The orbit packing and dump timing allows the inclusion of two ACS F502N full frame parallels for this visit, so we don't bother with the subarrays for this one. The same dithers will be used as in visit 02, but since the ACS parallels differ between the dither points, the dither positions need to be entered as POS TARGs on the primary exposures rather than by using a pattern. Exposure estimates for the 47 Tuc WFC3 field were done by comparing to a 132 s F438W exposure (IBQF03GIQ) taken of a different field at a similar cluster radius and stellar density. This exposure has about 1.5X the effective depth of the 360s F410M images included here, so the crowding and the number of good 14425( 2) - 19-Oct-2015 12:47:03 - [ 2] focus stars should be comparable in each case. From this exposure we estimate that the 360s F410M images of this field will include about 200 stellar point source images suitable for phase retrieval, with about 20 sources having > 20, 000 e- in the peak pixel of the PSF. ------------------------------------------------------------------------------------ 14425( 2) - 19-Oct-2015 12:47:03 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD2072 CALIBRATION, FOCUS TEST RA=00H24M14.5080S +/- 1.0", J2000 V = 9.09 +/- 0.1 B=9.85; U=9.47; DEC=-71D58'49.09" +/- 1.0" U=10.131; GALEX-NUV=12.13753; F336W=9.6 Reference Frame: ICRS Comments: Target is a bright star near 47 Tuc. Target is included WFC3 F275W, F336W, and F438W images (ibqf030b0, ibqf030a0, ibqf03090, respectively). Appears to be a good point source, although magnitude estimated from slightly saturated F336W image (F336W=9.6 vegamag) is brighter than suggested by the published ground based U magnitude (10.131). Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0014008140746420176 -0.023 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 14425( 2) - 19-Oct-2015 12:47:03 - [ 4] Visit: P2 Visit Requirements: SCHED 100%; ORIENT 255D TO 255 D; BEFORE 15-JUL-2016:00:00:00 On Hold Comments: Additional Comments: Orient fixed to allow observations to match those obtained in program 14063 during June 2015 Since we're mixing up the parallel exposures in each group, we need to do each group separately with POS-TARGs instead of a PATTERN. The X and Y POSTARG values below should match the dither box used for visit P1. Also see the comments included with the pattern definition. -0.418275 -0.418275 0.139425 -0.139425 0.418275 0.418275 -0.139425 0.139425 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4 2 35 S (70 POS TARG -0.418275, S) -0.418275; GS ACQ SCENARIO BASE1B3; SEQ 1-20 NON-INT; PAR 4-5 WITH 1-3 Comments: Full frame image x2 New WFPC2 estimate gives 9.47, so full well time drops to 37 s! STIS.im.712301 ------------------------------------------------------------------------------------------------------------------------------------ 2 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG -0.418275, SIZEAXIS2=128 S) -0.418275 Comments: Subarray image ------------------------------------------------------------------------------------------------------------------------------------ 3 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG -0.418275, SIZEAXIS2=128 S) -0.418275 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFC3/UVI ACCUM UVIS F410M CR-SPLIT=NO, FLASH=15 1 360 S (360 S S) Comments: Approach full well for giant branch stars near V=16, and useful focus estimates down to V=17 Estimates suggest approximately 200 stars should provide useful focus estimates Extra deep flash was used on advice of WFC3 team ------------------------------------------------------------------------------------------------------------------------------------ 14425( 2) - 19-Oct-2015 12:47:03 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 ANY ACS/WFC ACCUM WFC F502N FLASH=100 1 360 S (360 S) Comments: Exposure timed to allow bluer HB stars to be near full well. Some giant-branch stars will be saturated, but BOT suggests plenty of stars in well exposued but unsaturated range Since we can get two full frame ACS parallels in this visit, we will do that rather than taking four subarray images. Extra deep FLASH=100 recommended by ACS team for observations of bright point sources with a narrow band filter. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4 2 35 S (70 POS TARG 0.139425, S) -0.139425; PAR 10 WITH 6-9 Comments: Full frame image x2 New WFPC2 estimate gives 9.47, so full well time drops to 37 s! STIS.im.712301 ------------------------------------------------------------------------------------------------------------------------------------ 7 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG 0.139425, SIZEAXIS2=128 S) -0.139425 ------------------------------------------------------------------------------------------------------------------------------------ 8 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG 0.139425, SIZEAXIS2=128 S) -0.139425 Comments: Short 30 s safety exposures to be sure not to saturate target ------------------------------------------------------------------------------------------------------------------------------------ 9 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG 0.139425, SIZEAXIS2=128 S) -0.139425 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/UVI ACCUM UVIS F410M CR-SPLIT=NO, FLASH=15 1 360 S (360 S S) Comments: Deep F410M exposure. Full well for giant branch stars near V=15 Extra deep flash was used on advice of WFC3 team ------------------------------------------------------------------------------------------------------------------------------------ 11 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4 2 35 S (70 POS TARG 0.418275, S) 0.418275; PAR 15 WITH 11-14 Comments: Full frame image x2 New WFPC2 estimate gives 9.47, so full well time drops to 37 s! STIS.im.712301 ------------------------------------------------------------------------------------------------------------------------------------ 14425( 2) - 19-Oct-2015 12:47:03 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 12 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG 0.418275, SIZEAXIS2=128 S) 0.418275 ------------------------------------------------------------------------------------------------------------------------------------ 13 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG 0.418275, SIZEAXIS2=128 S) 0.418275 ------------------------------------------------------------------------------------------------------------------------------------ 14 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG 0.418275, SIZEAXIS2=128 S) 0.418275 ------------------------------------------------------------------------------------------------------------------------------------ 15 ANY WFC3/UVI ACCUM UVIS F410M CR-SPLIT=NO, FLASH=15 1 360 S (360 S S) Comments: Approach full well for giant branch stars near V=16, and useful focus estimates down to V=17 Estimates suggest approximately 200 stars should provide useful focus estimates Extra deep flash was used on advice of WFC3 team ------------------------------------------------------------------------------------------------------------------------------------ 16 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4 2 35 S (70 POS TARG -0.139425, S) 0.139425; PAR 19-20 WITH 16-18 Comments: Full frame image x2 New WFPC2 estimate gives 9.47, so full well time drops to 37 s! STIS.im.712301 ------------------------------------------------------------------------------------------------------------------------------------ 17 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG -0.139425, SIZEAXIS2=128 S) 0.139425 ------------------------------------------------------------------------------------------------------------------------------------ 18 HD2072 STIS/CCD ACCUM F28X50OII MIRROR CR-SPLIT=NO, GAIN=4, 2 35 S (70 POS TARG -0.139425, SIZEAXIS2=128 S) 0.139425 ------------------------------------------------------------------------------------------------------------------------------------ 19 ANY WFC3/UVI ACCUM UVIS F410M CR-SPLIT=NO, FLASH=15 1 360 S (360 S S) Comments: Deep F410M exposure. Full well for giant branch stars near V=15 Extra deep flash was used on advice of WFC3 team ------------------------------------------------------------------------------------------------------------------------------------ 14425( 2) - 19-Oct-2015 12:47:03 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 20 ANY ACS/WFC ACCUM WFC F502N FLASH=100 1 360 S (360 S) Comments: Exposure timed to allow bluer HB stars to be near full well. Some giant-branch stars will be saturated, but BOT suggests plenty of stars in well exposued but unsaturated range. Since we can get two full frame ACS parallels in this visit, we will do that rather than taking four subarray images. Extra deep FLASH=100 recommended by ACS team for observations of bright point sources with a narrow band filter. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD2072 1 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 1 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 2 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 2 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 3 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 3 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I ANY 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S ANY 5 ACS/WFC ACCUM WFC F502N none none none none 1 N/A HD2072 6 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 6 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 7 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 7 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 8 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 8 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I 14425( 2) - 19-Oct-2015 12:47:03 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD2072 9 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 9 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I ANY 10 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S HD2072 11 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 11 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 12 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 12 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 13 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 13 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 14 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 14 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I ANY 15 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S HD2072 16 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 16 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 17 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 17 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I HD2072 18 STIS/CCD ACCUM F28X50OI MIRROR none none 1 none 1 N/A I HD2072 18 STIS/CCD ACCUM F28X50OI MIRROR none none 2 none 1 N/A I ANY 19 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S ANY 20 ACS/WFC ACCUM WFC F502N none none none none 1 N/A 14425( 2) - 19-Oct-2015 12:47:03 - [ 9] Summary Form for Proposal 14425 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F28X50OII, UVIS, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, STIS/CCD, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=100, FLASH=15, GAIN=4, SIZEAXIS2=128 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 15-JUL-2016:00:00:00, GS ACQ SCENARIO BASE1B3, ORIENT 255D TO 255 D, PAR 10 WITH 6-9, PAR 15 WITH 11-14, PAR 19-20 WITH 16-18, PAR 4-5 WITH 1-3, POS TARG -0.139425, 0.139425, POS TARG -0.418275, -0.418275, POS TARG 0.139425, -0.139425, POS TARG 0.418275, 0.418275, SCHED 100%, SEQ 1-20 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F410M, F502N, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, HD2072 ------------------------------------------------------------------------------------------------------------------------------------