17846( 5) - 14-May-2025 15:23:05 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17846 Version: 5 Check-in Time: 14-May-2025 15:23:05 STScI Edit Number: 0 Title Tripling the sample of late-time Type Ia supernovae ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Or Graur University of Portsmouth Y CoI: Dr. Saurabh W. Jha Rutgers the State University of New Jersey N CoI: Dr. Adam Riess The Johns Hopkins University N CoI: Dr. Michael Shara American Museum of Natural History N CoI: Dr. David R. Zurek American Museum of Natural History N CoI: Dr. Armin Rest Space Telescope Science Institute N CoI: Dr. Ivo Rolf Seitenzahl University of New South Wales Canberra N CoI: Dr. Robert Fisher University of Massachusetts Dartmouth N CoI: Dr. Wolfgang E Kerzendorf Michigan State University N CoI: Dr. Andrew Giles Fullard Michigan State University N CoI: Dr. Andy Howell Las Cumbres Observatory Global Telescope N Network CoI: Dr. Curtis McCully Las Cumbres Observatory Global Telescope N Network CoI: Prof. Griffin Hosseinzadeh University of California - San Diego N CoI: Mr. Jamison Burke University of California - Santa Barbara N CoI: Ms. Maxime Deckers Trinity College Dublin N CoI: Dr. Kate Maguire Trinity College Dublin N CoI: Dr. Lluis Galbany Institute of Space Sciences (ICE-CSIC) N CoI: David Oscar Jones University of Hawaii N CoI: Dr. Yi Yang Tsinghua University N CoI: Dr. Huei Sears Rutgers the State University of New Jersey N ------------------------------------------------------------------------------------ Abstract Type Ia supernovae (SNe Ia) have long been used as standard candles to measure extragalactic distances and cosmological parameters. SNe Ia are portrayed as a homogeneous class, but there are actually several subtypes. Even the "normal" SNe Ia used for cosmology may not be homogeneous. Recently, the optical light curves of SNe Ia have been shown to slow down, relative to their earlier decline rate, at >800 days after explosion. Moreover, more luminous SNe Ia may slow down faster than less luminous objects. This correlation, which recalls the peak-light stretch-luminosity relation used to standardize SNe Ia, also hints at the existence of several production channels for normal SNe Ia, as no single explosion model can produce the full range of late-time light curves. But this new correlation is based on just 6 objects. We ask for 67 WFC3/UVIS orbits (with the F438W, F555W, and F814W filters) spread over Cycles 30-32 to observe 12 SNe Ia when they are 600-1200 days old. By tripling the sample of late-time SNe Ia, we will prove the existence of the new stretch-luminosity correlation at a significance of >5-sigma. The impact on SN cosmology will be twofold. First, a new stretch-luminosity correlation could further standardize SNe Ia and reduce systematic uncertainties. Second, strong evidence for the existence of multiple production channels for normal SNe Ia would force cosmologists to revisit their use of SNe Ia as a monolithic class. This experiment 17846( 5) - 14-May-2025 15:23:05 - [ 2] is time critical. Every year, on average, <5 SNe Ia can be used for this experiment. We are lucky to have 12 targets to work with this year; this chance may not come again during HST's remaining lifetime. ------------------------------------------------------------------------------------ Observations Description ------------------------ In this program, we will observe the late-time decline of 12 Type Ia supernovae at late times (600 < t < 1200 days after explosion). Each target will be visited at least 5 times. Some targets will be visited a 6th time, long after they have faded below the detection limit of our observations, to obtain template images for subtractions. Each visit will be 1 orbit long and will always include the F555W filter. The first two visits, while the targets are brightest, will also include the F438W and F625W filters, respectively. We will continue to use these additional filters in subsequent visits so long as the targets are bright enough. We will download and reduce the data for each visit immediately after they are taken to determine whether the targets are still bright enough or whether we need to drop the additional filters and devote the next orbits wholly to F555W. The cadence of our observations (100-150) days is long enough that we will have enough time to alter our phase II proposal in time for the next set of observations for any specific target. To ensure high-quality images for PSF-fitting photometry, we will use the WFC3-UVIS-3PT-LINE dither pattern. This means that, to fit in two filters, we will sometimes need to use a smaller field-of-view. Hence, we alternate between a full UVIS field of view (using UVIS, UVIS1 or UVIS2 to cover as much of the host galaxy as possible, depending on the target) and the UVIS2-C1K1C-SUB aperture. Once a given filter has been imaged once with the full aperture, we switch to the smaller one. F555W is an exception, as future visits will be devoted wholly to it, at which point we will switch from the smaller aperture to a full one. The timing of our observations is important, as we want to catch our targets at specific phases. To that end, we use BETWEEN timing constraints for each visit. Where possible, we use a ~10-day window for schduleability. This is a multi-cycle proposal, with 27 orbits in the first cycle, 30 in the second, and 10 in the last. NOTES FOR GO-17846 In this final cycle, most of the targets have already been observed five times, as required. For some targets, which are either faint or positioned in the inner parts of their host galaxies, we will obtain F555W templates that will then be subtracted from the previous observations. The one exception is SN 2021aefx, which still needs to be visited twice. Due to the transition to 1-gyro operations and the increasing number of failed visits, the templates are not scheduled at the very end of the cycle but midway through it, allowing for a second chance at visiting each target in case of a failed observation. ------------------------------------------------------------------------------------ 17846( 5) - 14-May-2025 15:23:05 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021J EXT-STAR, SUPERNOVA RA=12H26M27.0100S, J2000 V = 25 +/- 1 TYPE IA DEC=+31D13'20.57" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2021HIZ EXT-STAR, SUPERNOVA RA=12H25M41.6800S, J2000 V = 25 +/- 1 TYPE IA DEC=+07D13'42.20" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2021HPR EXT-STAR, SUPERNOVA RA=10H16M38.6800S, J2000 V = 25 +/- 1 TYPE IA DEC=+73D24'1.80" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2021PFS EXT-STAR, SUPERNOVA RA=14H03M23.5900S, J2000 V = 25 +/- 1 TYPE IA DEC=-06D01'53.80" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 7 SN2021RHU EXT-STAR, SUPERNOVA RA=00H03M15.4300S, J2000 V = 25 +/- 1 TYPE IA DEC=+16D08'44.50" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 8 SN2021SMJ EXT-STAR, SUPERNOVA RA=12H26M46.5500S, J2000 V = 25 +/- 1 TYPE IA DEC=+08D52'57.70" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 9 SN2021TKM EXT-STAR, SUPERNOVA RA=14H31M41.5500S, J2000 V = 25 +/- 1 TYPE IA DEC=-43D24'53.00" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 11 SN2021XJU EXT-STAR, SUPERNOVA RA=20H22M30.9600S, J2000 V = 25 TYPE IA DEC=-53D16'44.20" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 12 SN2021AEFX EXT-STAR, SUPERNOVA RA=04H19M53.3400S, J2000 V = 25 +/- 1 TYPE IA DEC=-54D56'52.60" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17846( 5) - 14-May-2025 15:23:05 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17846( 5) - 14-May-2025 15:23:05 - [ 5] Visit: 01 (SN 2021J - template - 280 days after last visit) Visit Requirements: BETWEEN 18-FEB-2025:00:00:00 AND 28-FEB-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021J WFC3/UVI ACCUM UVIS2-C1K F555W 1 824 S PATTERN 1 1 S 1C-SUB (2472 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021J 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021J 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021J 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 6] Visit: 02 (SN 2021hiz - template - 115 or 160 days after last visit) Visit Requirements: BETWEEN 06-APR-2025:00:00:00 AND 29-MAY-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021HIZ WFC3/UVI ACCUM UVIS2-C1K F555W 1 805 S PATTERN 1 1 S 1C-SUB (2415 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021HIZ 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021HIZ 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021HIZ 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 7] Visit: 03 (SN 2021hpr - template - 200 days after last visit) Visit Requirements: BETWEEN 11-MAY-2025:00:00:00 AND 21-MAY-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021HPR WFC3/UVI ACCUM UVIS1 F555W 1 846 S PATTERN 1 1 S (2538 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021HPR 1 WFC3/UVI ACCUM UVIS1 F555W 1 none none none 1 N/A S SN2021HPR 1 WFC3/UVI ACCUM UVIS1 F555W 2 none none none 1 N/A S SN2021HPR 1 WFC3/UVI ACCUM UVIS1 F555W 3 none none none 1 N/A S 17846( 5) - 14-May-2025 15:23:05 - [ 8] Visit: 04 (SN 2021pfs - template - 104 days after last visit) Visit Requirements: BETWEEN 05-APR-2025:00:00:00 AND 15-APR-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021PFS WFC3/UVI ACCUM UVIS2-C1K F555W 1 816 S PATTERN 1 1 S 1C-SUB (2448 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021PFS 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021PFS 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021PFS 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 9] Visit: 05 (SN 2021rhu - template - 276 days after last visit) Visit Requirements: BETWEEN 01-JUL-2025:00:00:00 AND 11-JUL-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021RHU WFC3/UVI ACCUM UVIS2-C1K F555W 1 821 S PATTERN 1 1 S 1C-SUB (2463 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021RHU 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021RHU 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021RHU 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 10] Visit: 06 (SN 2021smj - template - 115 or 160 days after last visit) Visit Requirements: BETWEEN 12-APR-2025:00:00:00 AND 28-MAY-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021SMJ WFC3/UVI ACCUM UVIS2-C1K F555W 1 816 S PATTERN 1 1 S 1C-SUB (2448 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021SMJ 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021SMJ 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021SMJ 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 11] Visit: 07 (SN 2021tkm - template - 190 days after last visit) Visit Requirements: BETWEEN 14-MAR-2025:00:00:00 AND 24-MAR-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021TKM WFC3/UVI ACCUM UVIS2-C1K F555W 1 829 S PATTERN 1 1 S 1C-SUB (2487 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021TKM 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021TKM 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021TKM 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 12] Visit: 08 (SN 2021xju - template - 240 days after last visit) Visit Requirements: BETWEEN 24-APR-2025:00:00:00 AND 03-MAY-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021XJU WFC3/UVI ACCUM UVIS2-C1K F555W 1 839 S PATTERN 1 1 S 1C-SUB (2517 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021XJU 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021XJU 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021XJU 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 13] Visit: 09 (SN 2021aefx - 1050 days) Visit Requirements: BETWEEN 10-OCT-2024:00:00:00 AND 20-OCT-2024:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021AEFX WFC3/UVI ACCUM UVIS2-C1K F555W 1 839 S PATTERN 1 1 S 1C-SUB (2517 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021AEFX 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021AEFX 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021AEFX 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 14] Visit: 10 (SN 2021aefx - 1200 days) Visit Requirements: BETWEEN 24-APR-2025:00:00:00 AND 03-MAY-2025:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN2021AEFX WFC3/UVI ACCUM UVIS2-C1K F555W 1 839 S PATTERN 1 1 S 1C-SUB (2517 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021AEFX 1 WFC3/UVI ACCUM UVIS2-C1 F555W 1 none none none 1 N/A S K1C-SUB SN2021AEFX 1 WFC3/UVI ACCUM UVIS2-C1 F555W 2 none none none 1 N/A S K1C-SUB SN2021AEFX 1 WFC3/UVI ACCUM UVIS2-C1 F555W 3 none none none 1 N/A S K1C-SUB 17846( 5) - 14-May-2025 15:23:05 - [ 15] Visit: 11 (SN 2021hpr - template - redo) Visit Requirements: BETWEEN 18-AUG-2025:00:00:00 AND 25-AUG-2025:00:00:00 On Hold Comments: Additional Comments: This is a redo of the failed visit 03, authorized through HOPR 93234. 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 SN2021HPR WFC3/UVI ACCUM UVIS1 F555W 1 846 S PATTERN 1 1 S (2538 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2021HPR 1 WFC3/UVI ACCUM UVIS1 F555W 1 none none none 1 N/A S SN2021HPR 1 WFC3/UVI ACCUM UVIS1 F555W 2 none none none 1 N/A S SN2021HPR 1 WFC3/UVI ACCUM UVIS1 F555W 3 none none none 1 N/A S 17846( 5) - 14-May-2025 15:23:05 - [ 16] Summary Form for Proposal 17846 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS1, UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-JUL-2025:00:00:00 AND 11-JUL-2025:00:00:00, BETWEEN 05-APR-2025:00:00:00 AND 15-APR-2025:00:00:00, BETWEEN 06-APR-2025:00:00:00 AND 29-MAY-2025:00:00:00, BETWEEN 10-OCT-2024:00:00:00 AND 20-OCT-2024:00:00:00, BETWEEN 11-MAY-2025:00:00:00 AND 21-MAY-2025:00:00:00, BETWEEN 12-APR-2025:00:00:00 AND 28-MAY-2025:00:00:00, BETWEEN 14-MAR-2025:00:00:00 AND 24-MAR-2025:00:00:00, BETWEEN 18-AUG-2025:00:00:00 AND 25-AUG-2025:00:00:00, BETWEEN 18-FEB-2025:00:00:00 AND 28-FEB-2025:00:00:00, BETWEEN 24-APR-2025:00:00:00 AND 03-MAY-2025:00:00:00, PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN2021AEFX, SN2021HIZ, SN2021HPR, SN2021J, SN2021PFS, SN2021RHU, SN2021SMJ, SN2021TKM, SN2021XJU ------------------------------------------------------------------------------------------------------------------------------------