12226( 2) - 09-Jul-2010 10:58:38 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12226 Version: 2 Check-in Time: 09-Jul-2010 10:58:38 STScI Edit Number: 0 Title The Hot Stellar Content and HB morphology of the massive globular cluster G1 ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. R. Michael Rich University of California - Los Angeles CoI: Prof. Giampaolo Piotto Universita di Padova N CoI: Dr. David B. Reitzel University of California - Los Angeles N CoI: Dr. Livia Origlia INAF, Osservatorio Astronomico di Bologna N CoI: Dr. Luigi R. Bedin Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract We propose to obtain deep WFC3 imagery of the Local Group's most luminous globular cluster, G1. Our primary aim is to define the hot stellar content and the extent of what appears to be a multimodal horizontal branch, analogous to those known in Omega Cen and NGC 2808. G1 is 40 kpc distant in the M31, and it would have been highly unlikely that collision with a giant molecular clould would be responsible for the complex populations which must therefore be the result of self-enrichment. We will obtain data very similar to those obtained for the known Galactic multimodal globular clusters NGC 6388 and 6441, and compare the stellar distribution on the horizontal branch with models. We can constrain the fraction of helium-enriched stars, if present, and search for supra-horizontal branch and other anomalous hot, evolved, stars. Parallel ACS observations will be the deepest ever obtained in the adjacnt field to G1, and will help to constrain whether G1 was the nucleus of a now disrupted galaxy. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will image G1 using WFC3 IR as the primary camera. 3 orbits in F275W - purpose: discover and characterize the UV bright stars. 3 orbits in F336W: If UV bright stars are discovered, two flux points will constrain T_eff. 2.5 orbits in F435W: Construct a classical color-magntiude diagram in Johnson B and V to assess metallicity range of the red giants. 2.5 orbits in F606W - same goal as above (CMD). The two bluest colors to constrain the temperature, Mbol and other physical properties of the hot star population. The F435 and F606 provide (1) additional flux points for the UV-bright stars; (2) a Johnson B, V CMD reaching below the HB to assess the metallicity spread. Real Time Justification ----------------------- Calibration Justification ------------------------- 12226( 2) - 09-Jul-2010 10:58:38 - [ 2] Additional Comments ------------------- ------------------------------------------------------------------------------------ 12226( 2) - 09-Jul-2010 10:58:38 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1 STELLAR CLUSTER, RA=00H32M46.5350S +/- 0.1", J2000 V = V = 13.0 +/- 0.5 GLOBULAR CLUSTER DEC=+39D34'41.13" +/- 0.1" -300.0 Reference Frame: ICRS Comments: G1 is a globular cluster in M31, 40 kpc from the M31 nucleus. ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1-OFF STELLAR CLUSTER, RA=00H32M46.5850S +/- 0.1", J2000 V = V = 13.0 +/- 0.5 GLOBULAR CLUSTER DEC=+39D34'41.63" +/- 0.1" -300.0 Reference Frame: ICRS Comments: G1 is a globular cluster in M31, 40 kpc from the M31 nucleus. ------------------------------------------------------------------------------------------------------------------------------------ 12226( 2) - 09-Jul-2010 10:58:38 - [ 4] Visit: 01 Visit Requirements: ORIENT 60D TO 240 D On Hold Comments: Additional Comments: F275W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F275W 1 1395 S POS TARG -2.8, -4.2; PAR S 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1 ACS/WFC ACCUM WFCENTER F606W 1 1300 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F275W 1 1395 S POS TARG -1.4, -2.8; PAR S 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-G1 ACS/WFC ACCUM WFCENTER F606W 1 1215 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F275W 1 1465 S POS TARG 0, -1.4; PAR 6 S WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-G1 ACS/WFC ACCUM WFCENTER F606W 1 1370 S see below ------------------------------------------------------------------------------------------------------------------------------------ 7 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F275W 1 1465 S POS TARG 1.4, 0; PAR 8 S WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 M31-G1 ACS/WFC ACCUM WFCENTER F606W 1 1285 S see below ------------------------------------------------------------------------------------------------------------------------------------ 9 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F275W 1 1465 S POS TARG 2.8, 1.4; PAR S 10 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 M31-G1 ACS/WFC ACCUM WFCENTER F606W 1 1370 S see below ------------------------------------------------------------------------------------------------------------------------------------ 11 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F275W 1 1465 S POS TARG 4.2, 2.8; PAR S 12 WITH 11 ------------------------------------------------------------------------------------------------------------------------------------ 12 M31-G1 ACS/WFC ACCUM WFCENTER F606W 1 1285 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 12226( 2) - 09-Jul-2010 10:58:38 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-G1 1 WFC3/UVI ACCUM UVIS2-FI F275W none none none none 1 N/A S X M31-G1 2 ACS/WFC ACCUM WFCENTER F606W none none none none 1 1310.0 S M31-G1 3 WFC3/UVI ACCUM UVIS2-FI F275W none none none none 1 N/A S X M31-G1 4 ACS/WFC ACCUM WFCENTER F606W none none none none 1 1275.0 S M31-G1 5 WFC3/UVI ACCUM UVIS2-FI F275W none none none none 2 N/A S X M31-G1 6 ACS/WFC ACCUM WFCENTER F606W none none none none 2 1430.0 S M31-G1 7 WFC3/UVI ACCUM UVIS2-FI F275W none none none none 2 N/A S X M31-G1 8 ACS/WFC ACCUM WFCENTER F606W none none none none 2 1345.0 S M31-G1 9 WFC3/UVI ACCUM UVIS2-FI F275W none none none none 3 N/A S X M31-G1 10 ACS/WFC ACCUM WFCENTER F606W none none none none 3 1430.0 S M31-G1 11 WFC3/UVI ACCUM UVIS2-FI F275W none none none none 3 N/A S X M31-G1 12 ACS/WFC ACCUM WFCENTER F606W none none none none 3 1345.0 S 12226( 2) - 09-Jul-2010 10:58:38 - [ 6] Visit: 02 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: F336W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F336W 1 885 S POS TARG -2.8, -4.2; PAR S see below 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1 ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F336W 1 885 S POS TARG -1.4, -2.8; PAR S see below 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-G1 ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F336W 1 885 S POS TARG 0, -1.4; PAR 6 S see below WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-G1 ACS/WFC ACCUM WFCENTER F814W 1 710 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-G1 1 WFC3/UVI ACCUM UVIS2-FI F336W none none none none 1 889.0 S S X M31-G1 2 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1 3 WFC3/UVI ACCUM UVIS2-FI F336W none none none none 1 889.0 S S X M31-G1 4 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1 5 WFC3/UVI ACCUM UVIS2-FI F336W none none none none 1 889.0 S S X M31-G1 6 ACS/WFC ACCUM WFCENTER F814W none none none none 1 764.0 S 12226( 2) - 09-Jul-2010 10:58:38 - [ 7] Visit: 03 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: F336W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F336W 1 885 S POS TARG 1.4, 0; PAR 2 S see below WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1 ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F336W 1 885 S POS TARG 2.8, 1.4; PAR 4 S see below WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-G1 ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-G1 WFC3/UVI ACCUM UVIS2-FIX F336W 1 885 S POS TARG 4.2, 2.8; PAR 6 S see below WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-G1 ACS/WFC ACCUM WFCENTER F814W 1 710 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-G1 1 WFC3/UVI ACCUM UVIS2-FI F336W none none none none 1 889.0 S S X M31-G1 2 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1 3 WFC3/UVI ACCUM UVIS2-FI F336W none none none none 1 889.0 S S X M31-G1 4 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1 5 WFC3/UVI ACCUM UVIS2-FI F336W none none none none 1 889.0 S S X M31-G1 6 ACS/WFC ACCUM WFCENTER F814W none none none none 1 764.0 S 12226( 2) - 09-Jul-2010 10:58:38 - [ 8] Visit: 04 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: F438W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F438W 1 1395 S POS TARG -2.8, -4.2; PAR S 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1-OFF ACS/WFC ACCUM WFCENTER F606W 1 1300 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F438W 1 1395 S POS TARG -1.4, -2.8; PAR S 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-G1-OFF ACS/WFC ACCUM WFCENTER F606W 1 1215 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F438W 1 1465 S POS TARG 0, -1.4; PAR 6 S WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-G1-OFF ACS/WFC ACCUM WFCENTER F606W 1 1370 S see below ------------------------------------------------------------------------------------------------------------------------------------ 7 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F438W 1 1465 S POS TARG 1.4, 0; PAR 8 S WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 M31-G1-OFF ACS/WFC ACCUM WFCENTER F606W 1 1285 S see below ------------------------------------------------------------------------------------------------------------------------------------ 9 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F438W 1 1465 S POS TARG 2.8, 1.4; PAR S 10 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 M31-G1-OFF ACS/WFC ACCUM WFCENTER F606W 1 1370 S see below ------------------------------------------------------------------------------------------------------------------------------------ 11 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F438W 1 1465 S POS TARG 4.2, 2.8; PAR S 12 WITH 11 ------------------------------------------------------------------------------------------------------------------------------------ 12 M31-G1-OFF ACS/WFC ACCUM WFCENTER F606W 1 1285 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 12226( 2) - 09-Jul-2010 10:58:38 - [ 9] 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-G1-OFF 1 WFC3/UVI ACCUM UVIS2-FI F438W none none none none 1 N/A S X M31-G1-OFF 2 ACS/WFC ACCUM WFCENTER F606W none none none none 1 1310.0 S M31-G1-OFF 3 WFC3/UVI ACCUM UVIS2-FI F438W none none none none 1 N/A S X M31-G1-OFF 4 ACS/WFC ACCUM WFCENTER F606W none none none none 1 1275.0 S M31-G1-OFF 5 WFC3/UVI ACCUM UVIS2-FI F438W none none none none 2 N/A S X M31-G1-OFF 6 ACS/WFC ACCUM WFCENTER F606W none none none none 2 1430.0 S M31-G1-OFF 7 WFC3/UVI ACCUM UVIS2-FI F438W none none none none 2 N/A S X M31-G1-OFF 8 ACS/WFC ACCUM WFCENTER F606W none none none none 2 1345.0 S M31-G1-OFF 9 WFC3/UVI ACCUM UVIS2-FI F438W none none none none 3 N/A S X M31-G1-OFF 10 ACS/WFC ACCUM WFCENTER F606W none none none none 3 1430.0 S M31-G1-OFF 11 WFC3/UVI ACCUM UVIS2-FI F438W none none none none 3 N/A S X M31-G1-OFF 12 ACS/WFC ACCUM WFCENTER F606W none none none none 3 1345.0 S 12226( 2) - 09-Jul-2010 10:58:38 - [ 10] Visit: 05 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: F606W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F606W 1 885 S POS TARG -2.8, -4.2; PAR S see below 2 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1-OFF ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F606W 1 885 S POS TARG -1.4, -2.8; PAR S see below 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-G1-OFF ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F606W 1 885 S POS TARG 0, -1.4; PAR 6 S see below WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-G1-OFF ACS/WFC ACCUM WFCENTER F814W 1 710 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-G1-OFF 1 WFC3/UVI ACCUM UVIS2-FI F606W none none none none 1 889.0 S S X M31-G1-OFF 2 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1-OFF 3 WFC3/UVI ACCUM UVIS2-FI F606W none none none none 1 889.0 S S X M31-G1-OFF 4 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1-OFF 5 WFC3/UVI ACCUM UVIS2-FI F606W none none none none 1 889.0 S S X M31-G1-OFF 6 ACS/WFC ACCUM WFCENTER F814W none none none none 1 764.0 S 12226( 2) - 09-Jul-2010 10:58:38 - [ 11] Visit: 06 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: F606W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F606W 1 885 S POS TARG 1.4, 0; PAR 2 S see below WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-G1-OFF ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F606W 1 885 S POS TARG 2.8, 1.4; PAR 4 S see below WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-G1-OFF ACS/WFC ACCUM WFCENTER F814W 1 800 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-G1-OFF WFC3/UVI ACCUM UVIS2-FIX F606W 1 885 S POS TARG 4.2, 2.8; PAR 6 S see below WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-G1-OFF ACS/WFC ACCUM WFCENTER F814W 1 710 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-G1-OFF 1 WFC3/UVI ACCUM UVIS2-FI F606W none none none none 1 889.0 S S X M31-G1-OFF 2 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1-OFF 3 WFC3/UVI ACCUM UVIS2-FI F606W none none none none 1 889.0 S S X M31-G1-OFF 4 ACS/WFC ACCUM WFCENTER F814W none none none none 1 800.0 S M31-G1-OFF 5 WFC3/UVI ACCUM UVIS2-FI F606W none none none none 1 889.0 S S X M31-G1-OFF 6 ACS/WFC ACCUM WFCENTER F814W none none none none 1 764.0 S 12226( 2) - 09-Jul-2010 10:58:38 - [ 12] Summary Form for Proposal 12226 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-FIX, WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 60D TO 240 D, PAR 10 WITH 9, PAR 12 WITH 11, PAR 2 WITH 1, PAR 4 WITH 3, PAR 6 WITH 5, PAR 8 WITH 7, POS TARG -1.4, -2.8, POS TARG -2.8, -4.2, POS TARG 0, -1.4, POS TARG 1.4, 0, POS TARG 2.8, 1.4, POS TARG 4.2, 2.8, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W, F336W, F438W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M31-G1, M31-G1-OFF ------------------------------------------------------------------------------------------------------------------------------------