17806( 6) - 16-Sep-2025 14:52:42 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17806 Version: 6 Check-in Time: 16-Sep-2025 14:52:42 STScI Edit Number: 0 Title R-process kilonovae associated with merger-driven gamma-ray bursts ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Nial Rahil Tanvir University of Leicester Y CoI: Prof. Andrew James Levan Radboud University Nijmegen N CoI: Dr. Andrea Rossi INAF - Osservatorio di Astrofisica e N Scienza dello Spazio CoI: Dr. Nancy Elias-Rosa INAF - Osservatorio Astronomico di Padova N CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N CoI: Dr. Benjamin Paul Gompertz University of Birmingham N CoI: Dr. Bo Milvang-Jensen University of Copenhagen, Niels Bohr N Institute CoI: Prof. Chris Ashall University of Hawaii N CoI: Dr. Darach Watson University of Copenhagen, Niels Bohr N Institute CoI: Dr. Daniele Bjorn Malesani University of Copenhagen, Niels Bohr N Institute CoI: Dr. Hanindyo Kuncarayakti University of Turku N CoI: Dr. Heloise Stevance University of Auckland N CoI: Dr. Francesca Onori INAF - Osservatorio Astronomico d'Abruzzo N CoI: Dr. Giorgos Leloudas Technical University of Denmark-DTU Space N CoI: Prof. Ilya Mandel Monash University N CoI: Dr. Ting-Wan Chen National Central University N CoI: Prof. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Dr. Kasper Elm Heintz University of Copenhagen, Niels Bohr N Institute CoI: Dr. Kate Maguire Trinity College Dublin N CoI: Dr. Kornpob Bhirombhakdi Space Telescope Science Institute N CoI: Dr. Lluis Galbany Institute of Space Sciences (ICE-CSIC) N CoI: Dr. Luca Izzo INAF - Osservatorio Astronomico di N Capodimonte CoI: Dr. Marica Branchesi Gran Sasso Science Institute N CoI: Dr. Mattia Bulla Universita degli studi di Ferrara N CoI: Dr. Michal Michalowski Adam Mickiewicz University N CoI: Mr. Nicola Gaspari Radboud University Nijmegen N CoI: Dr. Om Sharan Salafia INAF - Osservatorio Astronomico di Brera N CoI: Dr. Patricia Schady University of Bath N CoI: Dr. Paul Thomas O'Brien University of Leicester N CoI: Prof. Peter G. Jonker Radboud University Nijmegen N CoI: Dr. Rubina Kotak University of Turku N CoI: Sam Oates Lancaster University N CoI: Dr. Seppo Mattila University of Turku N CoI: Dr. Stefano Benetti INAF - Osservatorio Astronomico di Padova N CoI: Dr. Steve Schulze Northwestern University N CoI: Dr. Susanna Vergani Observatoire de Paris - Section de Meudon N 17806( 6) - 16-Sep-2025 14:52:42 - [ 2] CoI: Zhiping Jin Chinese Academy of Sciences N CoI: Dr. Morgan Fraser University College Dublin N CoI: Dr. Alina Istrate Radboud University Nijmegen N CoI: Dr. Lina Tomasella INAF - Osservatorio Astronomico di Padova N CoI: Dr. Gavin Lamb Liverpool John Moores University N CoI: Dr. Matt Nicholl Queen's University Belfast N CoI: Prof. Stephen J. Smartt University of Oxford N CoI: Dr. James Herbert Gillanders University of Oxford N ------------------------------------------------------------------------------------ Abstract The discovery of AT2017gfo, both prompt gamma-rays and a thermal kilonova (KN), associated with a binary neutron star (BNS) merger detected by aLIGO/AdV, GW170817, heralded the era of GW+EM multi-messenger astronomy. This landmark event confirmed both the association of some GRBs with compact binary mergers, and that neutron star material can be ejected in sufficient quantities to power a detectable radioactive transient. It opened a new window on long-standing problems in astrophysics, cosmology and fundamental physics, including the possibility that BNS and NSBH compact binary mergers are the dominant source of heavy r-process elements in the universe. However, the lack of success in identifying similar events in the O3 and O4a runs of the gravitational wave detector network highlighted that their rate is low in the nearby universe (e.g. z<0.1), thus opportunities for study of the kilonova population, crucial to understanding their range of behaviour and heavy element yields, for example, will be infrequent. Here we propose a ToO campaign to follow the light curve of a kilonova discovered during cycle 32, coincident with a well localised GRB at 0.1 Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.605 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17806( 6) - 16-Sep-2025 14:52:42 - [ 7] Visit: 01 (U1) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/UVI ACCUM UVIS F475W CR-SPLIT=NO, FLASH=10 1 370 S POS TARG -60, -30; S see below PATTERN 2 1 (2112 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 528.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 528.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 528.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F475W 4 none none none 1 528.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 8] Visit: 02 (U2) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 180.0D On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/UVI ACCUM UVIS F555W CR-SPLIT=NO, FLASH=6 1 370 S PATTERN 2 1 S see below (2124 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/UVI ACCUM UVIS F555W 1 none none none 1 531.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F555W 2 none none none 1 531.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F555W 3 none none none 1 531.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F555W 4 none none none 1 531.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 9] Visit: 03 (U3) Visit Requirements: SCHED 100%; TOO RESPONSE TIME 3.0D 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 EP250207B WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 370 S POS TARG -50, -25; S see below PATTERN 2 1 (2020 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 1 505.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 10] Visit: 04 (U4) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/UVI ACCUM UVIS F814W CR-SPLIT=NO, FLASH=8 1 370 S PATTERN 2 1 S see below (2120 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/UVI ACCUM UVIS F814W 1 none none none 1 530.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F814W 2 none none none 1 530.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F814W 3 none none none 1 530.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F814W 4 none none none 1 530.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 11] Visit: 05 (U5) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/UVI ACCUM UVIS F850LP CR-SPLIT=NO, FLASH=16 1 370 S PATTERN 2 1 S see below (2112 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/UVI ACCUM UVIS F850LP 1 none none none 1 528.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F850LP 2 none none none 1 528.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F850LP 3 none none none 1 528.0 S S KN+GRB 1 WFC3/UVI ACCUM UVIS F850LP 4 none none none 1 528.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 12] Visit: 06 (M1) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/UVI ACCUM UVIS2-C1K F475W CR-SPLIT=NO, FLASH=17 1 148 S POS TARG 0, 0; PATTERN 2 S 1C-SUB see below 1 (560 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KN+GRB WFC3/UVI ACCUM UVIS2-C1K F814W CR-SPLIT=NO, FLASH=17 1 135 S PATTERN 2 2 S 1C-SUB see below (508 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 KN+GRB WFC3/UVI ACCUM UVIS2-C1K F606W FLASH=17, CR-SPLIT=NO 1 85 S PATTERN 2 3 S 1C-SUB see below (308 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/UVI ACCUM UVIS2-C1 F475W 1 none none none 1 140.0 S S K1C-SUB KN+GRB 1 WFC3/UVI ACCUM UVIS2-C1 F475W 2 none none none 1 140.0 S S K1C-SUB KN+GRB 1 WFC3/UVI ACCUM UVIS2-C1 F475W 3 none none none 1 140.0 S S K1C-SUB KN+GRB 1 WFC3/UVI ACCUM UVIS2-C1 F475W 4 none none none 1 140.0 S S K1C-SUB KN+GRB 2 WFC3/UVI ACCUM UVIS2-C1 F814W 1 none none none 1 127.0 S S K1C-SUB KN+GRB 2 WFC3/UVI ACCUM UVIS2-C1 F814W 2 none none none 1 127.0 S S K1C-SUB KN+GRB 2 WFC3/UVI ACCUM UVIS2-C1 F814W 3 none none none 1 127.0 S S K1C-SUB KN+GRB 2 WFC3/UVI ACCUM UVIS2-C1 F814W 4 none none none 1 127.0 S S K1C-SUB KN+GRB 3 WFC3/UVI ACCUM UVIS2-C1 F606W 1 none none none 1 77.0 S S K1C-SUB KN+GRB 3 WFC3/UVI ACCUM UVIS2-C1 F606W 2 none none none 1 77.0 S S K1C-SUB KN+GRB 3 WFC3/UVI ACCUM UVIS2-C1 F606W 3 none none none 1 77.0 S S K1C-SUB KN+GRB 3 WFC3/UVI ACCUM UVIS2-C1 F606W 4 none none none 1 77.0 S S K1C-SUB 17806( 6) - 16-Sep-2025 14:52:42 - [ 13] Visit: 07 (M2) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/IR MULTIAC IR F140W NSAMP=11, SAMP-SEQ=STEP50 1 DEF PATTERN 4 1 CUM (897.697 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KN+GRB WFC3/UVI ACCUM UVIS2 F606W FLASH=14, CR-SPLIT=NO 1 348 S PATTERN 3 2 S see below (414 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM KN+GRB 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 1 138.0 S S KN+GRB 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 1 138.0 S S KN+GRB 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 1 138.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 14] Visit: 08 (M3) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/IR MULTIAC IR F160W NSAMP=11, SAMP-SEQ=STEP50 1 DEF CUM (299.232 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 KN+GRB WFC3/IR MULTIAC IR F105W NSAMP=12, SAMP-SEQ=STEP50 1 DEF CUM (349.233 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 KN+GRB WFC3/IR MULTIAC IR F105W NSAMP=12, SAMP-SEQ=STEP50 1 DEF POS TARG 0.451, 0.403 CUM (349.233 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 KN+GRB WFC3/IR MULTIAC IR F105W NSAMP=13, SAMP-SEQ=STEP50 1 DEF POS TARG 0.902, 0.806 CUM (399.233 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 KN+GRB WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=STEP50 1 DEF POS TARG 0.451, 0.403 CUM (399.233 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 KN+GRB WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=STEP50 1 DEF POS TARG 0.902, 0.806 CUM (399.233 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM KN+GRB 2 WFC3/IR MULTIAC IR F105W none none none none 1 N/A CUM KN+GRB 3 WFC3/IR MULTIAC IR F105W none none none none 1 N/A CUM KN+GRB 4 WFC3/IR MULTIAC IR F105W none none none none 1 N/A CUM KN+GRB 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM KN+GRB 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 15] Visit: 09 (I1) Visit Requirements: SCHED 100%; TOO RESPONSE TIME 3.0D 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 EP250207B WFC3/IR MULTIAC IR F105W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 16] Visit: 10 (I2) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/IR MULTIAC IR F110W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F110W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 17] Visit: 11 (I3) Visit Requirements: SCHED 100%; TOO RESPONSE TIME 3.0D 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 EP250207B WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 18] Visit: 12 (I4) Visit Requirements: SCHED 100%; ON HOLD On Hold Comments: Awaiting suitable GRB trigger 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 KN+GRB WFC3/IR MULTIAC IR F140W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ KN+GRB 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM KN+GRB 1 WFC3/IR MULTIAC IR F140W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 19] Visit: 13 (I5) Visit Requirements: SCHED 100%; TOO RESPONSE TIME 3.0D 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 EP250207B WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 20] Visit: 14 (U13) Visit Requirements: SCHED 100%; BEFORE 12-MAR-2025:00:00:00; TOO RESPONSE TIME 20.0D On Hold Comments: Additional Comments: Duplicate of U3 (visit 03) 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 EP250207B WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 370 S POS TARG -50, -25; S see below PATTERN 2 1 (2020 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 1 505.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 21] Visit: 15 (I11) Visit Requirements: SCHED 100%; BEFORE 12-MAR-2025:00:00:00; TOO RESPONSE TIME 20.0D On Hold Comments: Additional Comments: Duplicate of I1 (visit 09) 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 EP250207B WFC3/IR MULTIAC IR F105W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 22] Visit: 16 (I13) Visit Requirements: SCHED 100%; BEFORE 12-MAR-2025:00:00:00; TOO RESPONSE TIME 20.0D On Hold Comments: Additional Comments: Duplicate of I3 (visit 11) 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 EP250207B WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 23] Visit: 17 (I15) Visit Requirements: SCHED 100%; BEFORE 12-MAR-2025:00:00:00; TOO RESPONSE TIME 20.0D On Hold Comments: Additional Comments: Duplicate of I5 (visit 13) 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 EP250207B WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 24] Visit: 18 (UA) Visit Requirements: SCHED 100%; BEFORE 10-DEC-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 EP250207B WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 370 S POS TARG -50, -25; S see below PATTERN 2 1 (2020 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 1 505.0 S S EP250207B 1 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 1 505.0 S S 17806( 6) - 16-Sep-2025 14:52:42 - [ 25] Visit: 19 (IA) Visit Requirements: SCHED 100%; BEFORE 10-DEC-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 EP250207B WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 1 1 CUM (2211.749 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 | ------------------------------------------------------------------------------------------------------------------------------------ EP250207B 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM EP250207B 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 17806( 6) - 16-Sep-2025 14:52:42 - [ 26] Summary Form for Proposal 17806 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS, UVIS2, UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=10, FLASH=14, FLASH=16, FLASH=17, FLASH=6, FLASH=8, NSAMP=11, NSAMP=12, NSAMP=13, SAMP-SEQ=SPARS50, SAMP-SEQ=STEP50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 10-DEC-2025:00:00:00, BEFORE 12-MAR-2025:00:00:00, ON HOLD , PATTERN 1 1, PATTERN 2 1, PATTERN 2 2, PATTERN 2 3, PATTERN 3 2, PATTERN 4 1, POS TARG -50, -25, POS TARG -60, -30, POS TARG 0, 0, POS TARG 0.451, 0.403, POS TARG 0.902, 0.806, SCHED 100%, TOO RESPONSE TIME 180.0D, TOO RESPONSE TIME 20.0D, TOO RESPONSE TIME 3.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F105W, F110W, F125W, F140W, F160W, F475W, F555W, F606W, F814W, F850LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names EP250207B, KN+GRB ------------------------------------------------------------------------------------------------------------------------------------