13159( 2) - 01-Oct-2012 18:01:31 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13159 Version: 2 Check-in Time: 01-Oct-2012 18:01:31 STScI Edit Number: 0 Title ACS CCD Stability Monitor ------------------------------------------------------------------------------------ Type Cycle CAL/ACS 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Norman Grogin Space Telescope Science Institute Y CoI: Dr. Leonardo Ubeda Space Telescope Science Institute N CoI: Matt Mcmaster Space Telescope Science Institute N CoI: Roberto Avila Space Telescope Science Institute N CoI: Dr. Vera Kozhurina-Platais Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract A moderately crowded stellar field in the cluster 47 Tuc (6 arcmin West of the cluster core) is observed every four months with the WFC. The first visit exercises the full suite of broad and narrow band imaging filters and sub-array modes; following visits observe with only the six most popular Cycle 18 filters in full-frame mode. The positions and magnitudes of objects will be used to monitor local and large scale variations in the plate scale and the sensitivity of the detectors and to derive an independent measure of the detector CTE. One exposure in each sub-array mode with the WFC will allow us to verify that photometry obtained in full-frame and in sub-array modes are repeatable to better than 1%. This test is important for the ACS Photometric Cross-Calibration program, which uses sub-array exposures. This program may receive additional orbits to investigate ORIENT-dependent geometric distortion, which motivates the ORIENT and BETWEEN requirement on the first visit. ------------------------------------------------------------------------------------ Observations Description ------------------------ A moderately crowded stellar field in the cluster 47 Tuc (6 arcmin West of the cluster core) is observed every four months with the WFC. The first visit exercises the full suite of broad and narrow band imaging filters and sub-array modes; following visits observe with only the six most popular Cycle 18 filters in full-frame mode. Real Time Justification ----------------------- Calibration Justification ------------------------- The positions and magnitudes of objects will be used to monitor local and large scale variations in the plate scale and the sensitivity of the detectors and to derive an independent measure of the detector CTE. One exposure in each sub-array mode with the WFC will allow us to verify that photometry obtained in full-frame and in sub-array modes are repeatable to better than 1%.This test is important for the ACS Photometric Cross-Calibration program, which uses 13159( 2) - 01-Oct-2012 18:01:31 - [ 2] sub-array exposures. Additional Comments ------------------- This program may receive additional orbits to investigate ORIENT-dependent geometric distortion, which motivates the ORIENT and BETWEEN requirement on the first visit. ------------------------------------------------------------------------------------ 13159( 2) - 01-Oct-2012 18:01:31 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC104-WFC STELLAR CLUSTER, RA=00H22M38.5000S +/- 1", J2000 V = 17.5 +/- 0.1 GLOBULAR CLUSTER DEC=-72D04'4.00" +/- 1" Reference Frame: ICRS Comments: Magnitude of main-sequence turn-off stars. Field 6' W of cluster centre. ------------------------------------------------------------------------------------------------------------------------------------ 13159( 2) - 01-Oct-2012 18:01:31 - [ 4] Visit: 01 Visit Requirements: GYRO MODE 3GOBAD; ORIENT 22D TO 22 D; BETWEEN 26-OCT-2012:12:00:00 AND 08-NOV-2012:12:00:00; VISIBILITY INTERVAL 3510 S On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC104-WFC ACS/WFC ACCUM WFC1-1K F606W 1 30.0 S POS TARG -74.59748050209527, -84.12280464446769 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC104-WFC ACS/WFC ACCUM WFCENTER F555W 1 200.0 S ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC104-WFC ACS/WFC ACCUM WFCENTER F502N 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC104-WFC ACS/WFC ACCUM WFCENTER F606W 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC104-WFC ACS/WFC ACCUM WFCENTER F775W 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC104-WFC ACS/WFC ACCUM WFCENTER F850LP 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC104-WFC ACS/WFC ACCUM WFCENTER F475W 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC104-WFC ACS/WFC ACCUM WFC1-2K F606W 1 30.0 S POS TARG -48.7762870805303, -57.28585475031285 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC104-WFC ACS/WFC ACCUM WFCENTER F625W 1 300.0 S ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC104-WFC ACS/WFC ACCUM WFCENTER F658N 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC104-WFC ACS/WFC ACCUM WFCENTER F550M 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC104-WFC ACS/WFC ACCUM WFCENTER F660N 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC104-WFC ACS/WFC ACCUM WFCENTER F814W 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC104-WFC ACS/WFC ACCUM WFCENTER F435W 1 339.0 S ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC104-WFC 1 ACS/WFC ACCUM WFC1-1K F606W none none none none 1 N/A NGC104-WFC 2 ACS/WFC ACCUM WFCENTER F555W none none none none 1 N/A NGC104-WFC 3 ACS/WFC ACCUM WFCENTER F502N none none none none 1 N/A 13159( 2) - 01-Oct-2012 18:01:31 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC104-WFC 4 ACS/WFC ACCUM WFCENTER F606W none none none none 1 N/A NGC104-WFC 5 ACS/WFC ACCUM WFCENTER F775W none none none none 1 N/A NGC104-WFC 6 ACS/WFC ACCUM WFCENTER F850LP none none none none 1 N/A NGC104-WFC 7 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A NGC104-WFC 8 ACS/WFC ACCUM WFC1-2K F606W none none none none 2 N/A NGC104-WFC 9 ACS/WFC ACCUM WFCENTER F625W none none none none 2 N/A NGC104-WFC 10 ACS/WFC ACCUM WFCENTER F658N none none none none 2 N/A NGC104-WFC 11 ACS/WFC ACCUM WFCENTER F550M none none none none 2 N/A NGC104-WFC 12 ACS/WFC ACCUM WFCENTER F660N none none none none 2 N/A NGC104-WFC 13 ACS/WFC ACCUM WFCENTER F814W none none none none 2 N/A NGC104-WFC 14 ACS/WFC ACCUM WFCENTER F435W none none none none 2 N/A 13159( 2) - 01-Oct-2012 18:01:31 - [ 6] Visit: 02 Visit Requirements: GYRO MODE 3GOBAD; SCHED 40%; BETWEEN 05-MAR-2013:12:00:00 AND 14-MAR-2013:12:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC104-WFC ACS/WFC ACCUM WFCENTER F850LP 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC104-WFC ACS/WFC ACCUM WFCENTER F775W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC104-WFC ACS/WFC ACCUM WFCENTER F606W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC104-WFC ACS/WFC ACCUM WFCENTER F475W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC104-WFC ACS/WFC ACCUM WFCENTER F814W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC104-WFC ACS/WFC ACCUM WFCENTER F435W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC104-WFC 1 ACS/WFC ACCUM WFCENTER F850LP none none none none 1 N/A NGC104-WFC 2 ACS/WFC ACCUM WFCENTER F775W none none none none 1 N/A NGC104-WFC 3 ACS/WFC ACCUM WFCENTER F606W none none none none 1 N/A NGC104-WFC 4 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A NGC104-WFC 5 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A NGC104-WFC 6 ACS/WFC ACCUM WFCENTER F435W none none none none 1 N/A 13159( 2) - 01-Oct-2012 18:01:31 - [ 7] Visit: 03 Visit Requirements: GYRO MODE 3GOBAD; SCHED 40%; BETWEEN 20-JUN-2013:12:00:00 AND 30-JUN-2013:12:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC104-WFC ACS/WFC ACCUM WFCENTER F850LP 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC104-WFC ACS/WFC ACCUM WFCENTER F775W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC104-WFC ACS/WFC ACCUM WFCENTER F606W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC104-WFC ACS/WFC ACCUM WFCENTER F475W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC104-WFC ACS/WFC ACCUM WFCENTER F814W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC104-WFC ACS/WFC ACCUM WFCENTER F435W 1 339 S ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC104-WFC 1 ACS/WFC ACCUM WFCENTER F850LP none none none none 1 N/A NGC104-WFC 2 ACS/WFC ACCUM WFCENTER F775W none none none none 1 N/A NGC104-WFC 3 ACS/WFC ACCUM WFCENTER F606W none none none none 1 N/A NGC104-WFC 4 ACS/WFC ACCUM WFCENTER F475W none none none none 1 N/A NGC104-WFC 5 ACS/WFC ACCUM WFCENTER F814W none none none none 1 N/A NGC104-WFC 6 ACS/WFC ACCUM WFCENTER F435W none none none none 1 N/A 13159( 2) - 01-Oct-2012 18:01:31 - [ 8] Summary Form for Proposal 13159 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1-1K, WFC1-2K, WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 05-MAR-2013:12:00:00 AND 14-MAR-2013:12:00:00, BETWEEN 20-JUN-2013:12:00:00 AND 30-JUN-2013:12:00:00, BETWEEN 26-OCT-2012:12:00:00 AND 08-NOV-2012:12:00:00, GYRO MODE 3GOBAD, ORIENT 22D TO 22 D, POS TARG -48.7762870805303, -57.28585475031285, POS TARG -74.59748050209527, -84.12280464446769, SCHED 40%, VISIBILITY INTERVAL 3510 S ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W, F475W, F502N, F550M, F555W, F606W, F625W, F658N, F660N, F775W, F814W, F850LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC104-WFC ------------------------------------------------------------------------------------------------------------------------------------