18136( 3) - 18-Aug-2025 12:03:59 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18136 Version: 3 Check-in Time: 18-Aug-2025 12:03:59 STScI Edit Number: 0 Title Where is the central black hole in the LMC? ------------------------------------------------------------------------------------ Type Cycle GO 33 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Anil C. Seth University of Utah Y CoI: Jesse Han Harvard University N CoI: Dr. Kevin Andrew McKinnon University of Toronto N CoI: Dr. Sebastian Kamann Liverpool John Moores University N CoI: Dr. Nadine Neumayer Max Planck Institute for Astronomy N CoI: Dr. Eric Koch Smithsonian Institution Astrophysical N Observatory CoI: Dr. Florian Niederhofer Leibniz-Institut für Astrophysik Potsdam N (AIP) CoI: Elena Balakina Liverpool John Moores University N CoI: Dr. Nate Bastian Donostia International Physics Center N CoI: Dr. Lent Clifton Johnson Northwestern University N CoI: Prof. Jay Strader Michigan State University N CoI: Dr. Scott Lucchini Center for Astrophysics | Harvard & N Smithsonian CoI: Dr. Arash Bahramian Curtin University N CoI: Mr. Maximilian Haeberle Max Planck Institute for Astronomy N ------------------------------------------------------------------------------------ Abstract The presence of massive black holes remains poorly constrained in dwarf galaxies, especially in the late-type dwarfs that dominate the population. The nearest late-type dwarf galaxy, the Large Magellanic Cloud (LMC), is an important case in point. Despite its proximity, the presence of a massive black hole in the LMC remains unsettled, largely because of the uncertainty in the location of the center of this tidally disturbed galaxy. The recent discovery of a population of hypervelocity stars emanating from the central regions of the LMC strongly suggest that a massive black hole is present, but its location is poorly constrained. We will address this in two ways: first, we will obtain new HST imaging for two LMC hypervelocity stars, combining these data with Gaia to measure ultra-precise proper motions and localize their origin near the LMC's center a factor of 9 better than existing constraints. Second, we will obtain new imaging of NGC1916, the most likely nuclear star cluster of the LMC. When combined with archival HST data, this will allow us to measure high-precision proper motions (~3 km/s), enabling clean identification of cluster members. With this data we will weigh any black hole in this cluster through both dynamical modeling and the possible identification of any fast stars near the black hole. If a massive black hole is present in the LMC, these proposed observations offer the best chance to both reveal it and constrain its mass. ------------------------------------------------------------------------------------ Observations Description ------------------------ 18136( 3) - 18-Aug-2025 12:03:59 - [ 2] Exposure time strategies: NGC1916 -- matching previous observations in F555W and F814W with 10x exposure time differences for optimal proper motion determination. Getting F438W observations for stellar populations distinctions. F814W: 3x35s + 4x350s F555W: 3x35s + 5x350s F438W: 3x35s + 3x670s HVS3 --Match previous observation filter to obtain 10x350s exposures in F850LP (30% saturation); we will also take 3x45s in F814W (15% saturation); these can mitigate potential issues with the distortion solution in F850LP. HVS 7 -- For filter consistency, we will obtain 4x35s and 5x350s (9%/90% saturation) in F606W, and 4x440s in F467M (30% saturation), which has an accurate distortion solution & PSF. Dither pattern are used with POS TARGS; for targets with 3/4/5 exposures per filter we use a dither sequence that gets 0.5 pixel dithers in x/y/x&y along with integer pixel dithers to make sure hot pixels don't impact more than a single exposure. For HVS3, the 10 exposures use a 1/3rd pixel offset grid for the first 9 exposures and then use 1/2 pixel offset. These are added to integer pixel offsets. Flash set to near the minimum values to reduce CTE issues for all exposures. ------------------------------------------------------------------------------------ 18136( 3) - 18-Aug-2025 12:03:59 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-1916 STELLAR CLUSTER, RA=05H18M37.8700S, J2000 V = 10.38 GLOBULAR CLUSTER DEC=-69D24'22.90" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 HVS3 EXT-STAR, B0-B2 III-I RA=04H38M12.7700S, J2000 V = 16.42 +/- 0.2 aka HE 0437-5439 DEC=-54D33'11.90" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 HVS7 EXT-STAR, B3-B5 III-I RA=11H33M12.1224S, J2000 V = 17.9 +/- 0.2 G=17.934, BP-RP=-0.105 DEC=+01D08'24.84" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 18136( 3) - 18-Aug-2025 12:03:59 - [ 4] Visit: 02 (HVS7) Visit Requirements: 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 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=16 1 45 S (45 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=3 1 350 S (350 SAME POS AS 1 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=3 1 350 S (350 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=3 1 350 S (350 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=3 1 350 S (350 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=3 1 350 S (350 POS TARG 0.21, 0.21 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=16 1 45 S (45 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=16 1 45 S (45 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 HVS7 WFC3/UVI ACCUM UVIS1 F467M FLASH=15 1 440 S (440 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 HVS7 WFC3/UVI ACCUM UVIS1 F467M FLASH=15 1 440 S (440 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 11 HVS7 WFC3/UVI ACCUM UVIS1 F467M FLASH=15 1 440 S (440 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 12 HVS7 WFC3/UVI ACCUM UVIS1 F467M FLASH=15 1 440 S (440 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 13 HVS7 WFC3/UVI ACCUM UVIS1 F606W FLASH=16 1 45 S (45 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 18136( 3) - 18-Aug-2025 12:03:59 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HVS7 1 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 2 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 3 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 4 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 5 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 7 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S HVS7 8 WFC3/UVI ACCUM UVIS1 F606W none none none none 2 N/A S HVS7 9 WFC3/UVI ACCUM UVIS1 F467M none none none none 2 N/A S HVS7 10 WFC3/UVI ACCUM UVIS1 F467M none none none none 2 N/A S HVS7 11 WFC3/UVI ACCUM UVIS1 F467M none none none none 2 N/A S HVS7 12 WFC3/UVI ACCUM UVIS1 F467M none none none none 2 N/A S HVS7 13 WFC3/UVI ACCUM UVIS1 F606W none none none none 2 N/A S 18136( 3) - 18-Aug-2025 12:03:59 - [ 6] Visit: 03 (NGC1916_fullframe) Visit Requirements: 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-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=16 1 35 S (35 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=16 1 35 S (35 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-1916 WFC3/UVI ACCUM UVIS2 F438W FLASH=11 1 670 S (670 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=10 1 350 S (350 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=10 1 350 S (350 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=10 1 350 S (350 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=16 1 35 S (35 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=16 1 35 S (35 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=16 1 35 S (35 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC-1916 WFC3/UVI ACCUM UVIS2 F438W FLASH=11 1 670 S (670 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=10 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=10 1 350 S (350 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=10 1 350 S (350 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=16 1 35 S (35 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 18136( 3) - 18-Aug-2025 12:03:59 - [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC-1916 WFC3/UVI ACCUM UVIS2 F438W FLASH=16 1 35 S (35 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 16 NGC-1916 WFC3/UVI ACCUM UVIS2 F438W FLASH=16 1 35 S (35 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17 NGC-1916 WFC3/UVI ACCUM UVIS2 F438W FLASH=11 1 670 S (670 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 18 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=10 1 350 S (350 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 19 NGC-1916 WFC3/UVI ACCUM UVIS2 F555W FLASH=10 1 350 S (350 POS TARG 0.21, 0.21 S S) ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC-1916 WFC3/UVI ACCUM UVIS2 F814W FLASH=10 1 350 S (350 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 21 NGC-1916 WFC3/UVI ACCUM UVIS2 F438W FLASH=16 1 35 S (35 POS TARG 0.46, 0.46 S 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-1916 1 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S NGC-1916 2 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S NGC-1916 3 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 N/A S NGC-1916 4 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S NGC-1916 5 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S NGC-1916 6 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S NGC-1916 7 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S NGC-1916 8 WFC3/UVI ACCUM UVIS2 F555W none none none none 2 N/A S NGC-1916 9 WFC3/UVI ACCUM UVIS2 F555W none none none none 2 N/A S NGC-1916 10 WFC3/UVI ACCUM UVIS2 F438W none none none none 2 N/A S 18136( 3) - 18-Aug-2025 12:03:59 - [ 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-1916 11 WFC3/UVI ACCUM UVIS2 F555W none none none none 2 N/A S NGC-1916 12 WFC3/UVI ACCUM UVIS2 F555W none none none none 2 N/A S NGC-1916 13 WFC3/UVI ACCUM UVIS2 F555W none none none none 2 N/A S NGC-1916 14 WFC3/UVI ACCUM UVIS2 F555W none none none none 2 N/A S NGC-1916 15 WFC3/UVI ACCUM UVIS2 F438W none none none none 3 N/A S NGC-1916 16 WFC3/UVI ACCUM UVIS2 F438W none none none none 3 N/A S NGC-1916 17 WFC3/UVI ACCUM UVIS2 F438W none none none none 3 N/A S NGC-1916 18 WFC3/UVI ACCUM UVIS2 F555W none none none none 3 N/A S NGC-1916 19 WFC3/UVI ACCUM UVIS2 F555W none none none none 3 N/A S NGC-1916 20 WFC3/UVI ACCUM UVIS2 F814W none none none none 3 N/A S NGC-1916 21 WFC3/UVI ACCUM UVIS2 F438W none none none none 3 N/A S 18136( 3) - 18-Aug-2025 12:03:59 - [ 9] Visit: 04 (HVS3) Visit Requirements: 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 HVS3 WFC3/UVI ACCUM UVIS1 F814W FLASH=16 1 35 S (35 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 SAME POS AS 1 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.293, 0.293 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.587, 0.587 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.667, 0.080 S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.08, 0.667 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 HVS3 WFC3/UVI ACCUM UVIS1 F814W FLASH=16 1 35 S (35 POS TARG 0.333, 0.507 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 HVS3 WFC3/UVI ACCUM UVIS1 F814W FLASH=16 1 35 S (35 POS TARG 0.08, 0.54 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.507, 0.333 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.333, 0.507 S S) ------------------------------------------------------------------------------------------------------------------------------------ 11 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG -0.08, 0.253 S S) ------------------------------------------------------------------------------------------------------------------------------------ 12 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.253, -0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 13 HVS3 WFC3/UVI ACCUM UVIS1 F850LP FLASH=14 1 350 S (350 POS TARG 0.46, 0.46 S S) ------------------------------------------------------------------------------------------------------------------------------------ 14 HVS3 WFC3/UVI ACCUM UVIS1 F814W FLASH=16 1 35 S (35 POS TARG 0.38, 0.08 S S) ------------------------------------------------------------------------------------------------------------------------------------ 18136( 3) - 18-Aug-2025 12:03:59 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HVS3 1 WFC3/UVI ACCUM UVIS1 F814W none none none none 1 N/A S HVS3 2 WFC3/UVI ACCUM UVIS1 F850LP none none none none 1 N/A S HVS3 3 WFC3/UVI ACCUM UVIS1 F850LP none none none none 1 N/A S HVS3 4 WFC3/UVI ACCUM UVIS1 F850LP none none none none 1 N/A S HVS3 5 WFC3/UVI ACCUM UVIS1 F850LP none none none none 1 N/A S HVS3 6 WFC3/UVI ACCUM UVIS1 F850LP none none none none 1 N/A S HVS3 7 WFC3/UVI ACCUM UVIS1 F814W none none none none 1 N/A S HVS3 8 WFC3/UVI ACCUM UVIS1 F814W none none none none 2 N/A S HVS3 9 WFC3/UVI ACCUM UVIS1 F850LP none none none none 2 N/A S HVS3 10 WFC3/UVI ACCUM UVIS1 F850LP none none none none 2 N/A S HVS3 11 WFC3/UVI ACCUM UVIS1 F850LP none none none none 2 N/A S HVS3 12 WFC3/UVI ACCUM UVIS1 F850LP none none none none 2 N/A S HVS3 13 WFC3/UVI ACCUM UVIS1 F850LP none none none none 2 N/A S HVS3 14 WFC3/UVI ACCUM UVIS1 F814W none none none none 2 N/A S 18136( 3) - 18-Aug-2025 12:03:59 - [ 11] Summary Form for Proposal 18136 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS1, UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=10, FLASH=11, FLASH=14, FLASH=15, FLASH=16, FLASH=3 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG -0.08, 0.253, POS TARG 0, 0, POS TARG 0.08, 0.54, POS TARG 0.08, 0.667, POS TARG 0.21, 0.21, POS TARG 0.253, -0.08, POS TARG 0.293, 0.293, POS TARG 0.333, 0.507, POS TARG 0.38, 0.08, POS TARG 0.46, 0.46, POS TARG 0.507, 0.333, POS TARG 0.587, 0.587, POS TARG 0.667, 0.080, SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F438W, F467M, F555W, F606W, F814W, F850LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names HVS3, HVS7, NGC-1916 ------------------------------------------------------------------------------------------------------------------------------------