17926( 2) - 30-Jan-2025 15:31:18 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17926 Version: 2 Check-in Time: 30-Jan-2025 15:31:18 STScI Edit Number: 0 Title Enabling cross instrument proper motions with Draco dSph and NGC 2419 ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Paul Bennet Space Telescope Science Institute Y CoI: Dr. Sangmo Tony Sohn Space Telescope Science Institute N CoI: Dr. Roeland P. van der Marel Space Telescope Science Institute N CoI: Dr. Kevin Andrew McKinnon Canadian Institute for Theoretical N Astrophysics CoI: Dr. Ekta Patel University of Utah N CoI: Dr. Mark Fardal Eureka Scientific Inc. N CoI: Dr. Nitya Kallivayalil The University of Virginia N CoI: Dr. Laura L. Watkins Space Telescope Science Institute - ESA - N JWST CoI: Prof. Andrew Wetzel University of California - Davis N CoI: Jack Thomas Warfield The University of Virginia N CoI: Dr. Erik Tollerud Space Telescope Science Institute N CoI: Dr. Andrea Bellini Space Telescope Science Institute N CoI: Dr. Mattia Libralato INAF - Osservatorio Astronomico di Padova N CoI: Dr. Eduardo Vitral University of Edinburgh, Institute for N Astronomy CoI: Dr. Andrew Pace Carnegie Mellon University N CoI: Dr. Christopher Garling The University of Virginia N ------------------------------------------------------------------------------------ Abstract An unexpected way that ACS/WFC has transformed our knowledge of the Universe is through kinematics, especially via the measurement of proper motions (PMs) for galaxies and star clusters across the Local Group (LG) and beyond. This work requires extremely high precision astrometry and relies on long time baselines. Together, these requirements have made ACS the best, and in many cases, the only instrument for this type of work. Through observations of the Draco and NGC 2419, this proposal aims to cross-calibrate ACS/WFC with WFC3/UVIS and JWST/NIRCam to enable this important science to continue after ACS/WFC is decommissioned. We will also improve the determination of the type of dark matter halo in the Milky Way satellite galaxy Draco dwarf spheriodal, core or cusp, to a limit of 10 sigma. This will be the best data to date for resolving the tension of the core-cusp problem in Lambda CMD. We will also investigate the kinematic properties of the known multiple populations in the distant massive Milky Way Globular cluster NGC 2419 , which will help constraints its formation and evolution. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to observe Draco dSph and the Milky Way globular cluster NGC 2419 in order to cross match the astrometric results with near simultaneous HST/ACS and HST/WFC3 observations of these targets. This will allow us to astrometrically 17926( 2) - 30-Jan-2025 15:31:18 - [ 2] calibrate these instruments to enable future proper motion measurements using cross observatory and cross instrument calibrations we derive. This will enable to use of ACS images as first epochs even after ACS is decommissioned, something that is not currently possible without a second epoch of ACS measurements. We will also compare with JWST NIRCam. ------------------------------------------------------------------------------------ 17926( 2) - 30-Jan-2025 15:31:18 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 DRACO-F1 GALAXY, DWARF RA=17H20M49.1617S, J2000 V = 18 ELLIPTICAL DEC=+57D54'50.88" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-2419 EXT-CLUSTER, GLOBULAR RA=07H37M49.4160S, J2000 V = 18 CLUSTER DEC=+38D51'2.86" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17926( 2) - 30-Jan-2025 15:31:18 - [ 4] Visit: 01 Visit Requirements: ORIENT 59D TO 61 D; GROUP 01, 02 WITHIN 90D 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DRACO-F1 ACS/WFC ACCUM WFC F606W 1 1140 S POS TARG 0, 0; PAR 2 see below WITH 1 (1175 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S S see below (1235 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DRACO-F1 ACS/WFC ACCUM WFC F606W 1 1140 S POS TARG 0.1647, 0.0124; see below PAR 4 WITH 3 (1145 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S S see below (1155 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 DRACO-F1 ACS/WFC ACCUM WFC F606W 1 1140 S POS TARG 0.3293, 0.0248; see below PAR 6 WITH 5 (1237 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S S see below (1247 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 DRACO-F1 ACS/WFC ACCUM WFC F606W 1 1140 S POS TARG 0.0747, 0.1294; see below PAR 8 WITH 7 (1166 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S S see below (1176 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 DRACO-F1 ACS/WFC ACCUM WFC F606W 1 1140 S POS TARG 0.2393, 0.1418; see below PAR 10 WITH 9 (1252 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S S see below (1262 S) ------------------------------------------------------------------------------------------------------------------------------------ 17926( 2) - 30-Jan-2025 15:31:18 - [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 11 DRACO-F1 ACS/WFC ACCUM WFC F606W 1 1140 S POS TARG 0.4039, 0.1541; see below PAR 12 WITH 11 (1171 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S S see below (1181 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 | ------------------------------------------------------------------------------------------------------------------------------------ DRACO-F1 1 ACS/WFC ACCUM WFC F606W none none none none 1 1175.0 S DRACO-F1 2 WFC3/UVI ACCUM UVIS F606W none none none none 1 1235.0 S S DRACO-F1 3 ACS/WFC ACCUM WFC F606W none none none none 1 1145.0 S DRACO-F1 4 WFC3/UVI ACCUM UVIS F606W none none none none 1 1155.0 S S DRACO-F1 5 ACS/WFC ACCUM WFC F606W none none none none 2 1237.0 S DRACO-F1 6 WFC3/UVI ACCUM UVIS F606W none none none none 2 1247.0 S S DRACO-F1 7 ACS/WFC ACCUM WFC F606W none none none none 2 1166.0 S DRACO-F1 8 WFC3/UVI ACCUM UVIS F606W none none none none 2 1176.0 S S DRACO-F1 9 ACS/WFC ACCUM WFC F606W none none none none 3 1252.0 S DRACO-F1 10 WFC3/UVI ACCUM UVIS F606W none none none none 3 1262.0 S S DRACO-F1 11 ACS/WFC ACCUM WFC F606W none none none none 3 1171.0 S DRACO-F1 12 WFC3/UVI ACCUM UVIS F606W none none none none 3 1181.0 S S 17926( 2) - 30-Jan-2025 15:31:18 - [ 6] Visit: 02 Visit Requirements: GROUP 02, 01 WITHIN 90D 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S POS TARG 0.000, 0.000 S see below (1311 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S POS TARG 0.1318, 0.010 S see below (1271 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S POS TARG 0.2634, 0.0198 S see below (1281 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S POS TARG 0.0598, 0.1035 S see below (1281 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S POS TARG 0.1914, 0.1134 S see below (1281 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 DRACO-F1 WFC3/UVI ACCUM UVIS F606W 1 1140 S POS TARG 0.3231, 0.1233 S see below (1281 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 | ------------------------------------------------------------------------------------------------------------------------------------ DRACO-F1 1 WFC3/UVI ACCUM UVIS F606W none none none none 1 1311.0 S S DRACO-F1 2 WFC3/UVI ACCUM UVIS F606W none none none none 1 1271.0 S S DRACO-F1 3 WFC3/UVI ACCUM UVIS F606W none none none none 2 1281.0 S S DRACO-F1 4 WFC3/UVI ACCUM UVIS F606W none none none none 2 1281.0 S S DRACO-F1 5 WFC3/UVI ACCUM UVIS F606W none none none none 3 1281.0 S S DRACO-F1 6 WFC3/UVI ACCUM UVIS F606W none none none none 3 1281.0 S S 17926( 2) - 30-Jan-2025 15:31:18 - [ 7] Visit: 03 Visit Requirements: ORIENT 256D TO 257 D; GROUP 03, 04 WITHIN 90D 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-2419 ACS/WFC ACCUM WFC F814W 1 1140 S POS TARG 0, 0; PAR 2 (1140 S) WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S S see below (1200 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-2419 ACS/WFC ACCUM WFC F814W 1 1140 S POS TARG 0.148, 0.086; (1140 S) PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S S (1140 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-2419 ACS/WFC ACCUM WFC F814W 1 1140 S POS TARG 0.222, 0.240; see below PAR 6 WITH 5 (1171 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S S see below (1181 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-2419 ACS/WFC ACCUM WFC F814W 1 1140 S POS TARG 0.074, 0.154; see below PAR 8 WITH 7 (1171 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S S see below (1181 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-2419 1 ACS/WFC ACCUM WFC F814W none none none none 1 N/A NGC-2419 2 WFC3/UVI ACCUM UVIS F814W none none none none 1 1200.0 S S NGC-2419 3 ACS/WFC ACCUM WFC F814W none none none none 1 N/A NGC-2419 4 WFC3/UVI ACCUM UVIS F814W none none none none 1 N/A S NGC-2419 5 ACS/WFC ACCUM WFC F814W none none none none 2 1171.0 S 17926( 2) - 30-Jan-2025 15:31:18 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-2419 6 WFC3/UVI ACCUM UVIS F814W none none none none 2 1181.0 S S NGC-2419 7 ACS/WFC ACCUM WFC F814W none none none none 2 1171.0 S NGC-2419 8 WFC3/UVI ACCUM UVIS F814W none none none none 2 1181.0 S S 17926( 2) - 30-Jan-2025 15:31:18 - [ 9] Visit: 04 Visit Requirements: GROUP 04, 03 WITHIN 90D 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S POS TARG 0.0, 0.0 S see below (1281 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S POS TARG 0.158, 0.070 S see below (1241 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S POS TARG 0.099, 0.165 S see below (1251 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-2419 WFC3/UVI ACCUM UVIS F814W 1 1140 S POS TARG -0.060, 0.095 S see below (1251 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-2419 1 WFC3/UVI ACCUM UVIS F814W none none none none 1 1281.0 S S NGC-2419 2 WFC3/UVI ACCUM UVIS F814W none none none none 1 1241.0 S S NGC-2419 3 WFC3/UVI ACCUM UVIS F814W none none none none 2 1251.0 S S NGC-2419 4 WFC3/UVI ACCUM UVIS F814W none none none none 2 1251.0 S S 17926( 2) - 30-Jan-2025 15:31:18 - [ 10] Summary Form for Proposal 17926 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 01, 02 WITHIN 90D, GROUP 02, 01 WITHIN 90D, GROUP 03, 04 WITHIN 90D, GROUP 04, 03 WITHIN 90D, ORIENT 256D TO 257 D, ORIENT 59D TO 61 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 -0.060, 0.095, POS TARG 0, 0, POS TARG 0.0, 0.0, POS TARG 0.000, 0.000, POS TARG 0.0598, 0.1035, POS TARG 0.074, 0.154, POS TARG 0.0747, 0.1294, POS TARG 0.099, 0.165, POS TARG 0.1318, 0.010, POS TARG 0.148, 0.086, POS TARG 0.158, 0.070, POS TARG 0.1647, 0.0124, POS TARG 0.1914, 0.1134, POS TARG 0.222, 0.240, POS TARG 0.2393, 0.1418, POS TARG 0.2634, 0.0198, POS TARG 0.3231, 0.1233, POS TARG 0.3293, 0.0248, POS TARG 0.4039, 0.1541 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names DRACO-F1, NGC-2419 ------------------------------------------------------------------------------------------------------------------------------------