17450( 5) - 23-Aug-2025 01:21:15 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17450 Version: 5 Check-in Time: 23-Aug-2025 01:21:15 STScI Edit Number: 1 Title A holistic view of compact binary mergers: from kilonova to afterglow ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Eleonora Troja Universita degli Studi di Roma Tor Vergata Y CoI: Dr. Ori Dosovitz Fox Space Telescope Science Institute N CoI: Dr. Nathaniel Butler Arizona State University N CoI: Dr. Alan Watson National Autonomous University of Mexico N CoI: Dr. William H. Lee National Autonomous University of Mexico N CoI: Josefa Becerra-Gonzalez Instituto de Astrofisica de Canarias N CoI: Dr. Chris Fryer Los Alamos National Laboratory N CoI: Dr. Alexander Kutyrev University of Maryland N CoI: Brendan O'Connor Carnegie Mellon University N CoI: Dr. James Herbert Gillanders University of Oxford N CoI: Dr. Taka Sakamoto Aoyama Gakuin University N CoI: Dr. Amy Lien University of Tampa N CoI: Oleg Korobkin Los Alamos National Laboratory N CoI: Ryan Wollaeger Los Alamos National Laboratory N CoI: Hendrik J VanEerten University of Bath N CoI: Dr. Geoffrey Ryan Perimeter Institute for Theoretical N Physics CoI: Simone Dichiara The Pennsylvania State University N CoI: Dr. Yuhan Yang Universita degli Studi di Roma Tor Vergata N ------------------------------------------------------------------------------------ Abstract The fate of two compact objects is to spiral into each other and eventually collide (or merge) due to angular momentum and energy losses to gravitational radiation. By combining extreme gravity, copious emission of gravitational waves, and luminous electromagnetic radiation, these mergers serve as excellent astrophysical laboratories to explore a wide range of fundamental problems: from the formation of ultrafast outflows to the cosmic production of heavy metals, from the equation of state of cold ultra-dense matter to the expansion rate of the universe. Our understanding of these systems was revolutionized in 2017 by the discovery of GW170817, the first mergers of two neutron stars (NSs) studied through gravitational waves and light. Thanks to its proximity and an unprecedented observing campaign, this one event revealed the rich complexity of the merger phenomenon and opened up new horizons for the study of these systems. Here we propose a comprehensive investigation of compact binary mergers aimed at maximizing the scientific return of future GW events. By using of the unique HST capabilities, we will map the explosion properties and environment of NS mergers with unprecedented detail, thus realizing in full the potential of multi-messenger astrophysics. ------------------------------------------------------------------------------------ Observations Description ------------------------ We request 6 orbits of disruptive ToO observations split between 3 visits. 17450( 5) - 23-Aug-2025 01:21:15 - [ 2] We will use the WFC3/UVIS camera with the F225W and F336W filters and grism G280 for bright events. We request 6 orbits of disruptive ToO observations split between 3 visits. We will use the WFC3/IR camera with the F105W, F125W, and F160W filters and grisms G102/G141 for bright events. We request 12 orbits of non-disruptive ToO observations split between 4 visits. We will use the WFC3/UVIS and IR cameras with the F606W, F814W, F110W, and F160W filters. ------------------------------------------------------------------------------------ 17450( 5) - 23-Aug-2025 01:21:15 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 4 AT2025ULZ STAR, EJECTA, NEUTRON RA=15H51M54.1711S, J2000 V = 28 STAR DEC=+30D54'8.33" Reference Frame: Other: ZTF Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 17450( 5) - 23-Aug-2025 01:21:15 - [ 4] TARGET LIST Generic Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Selection Criteria | Flux data No | Name | Description | | ------------------------------------------------------------------------------------------------------------------------------------ 1 UVKN EXT-STAR, GAMMA RAY GW COUNTERPART V = 20 BURSTER ------------------------------------------------------------------------------------------------------------------------------------ 2 IRKN EXT-STAR, GAMMA RAY GW COUNTERPART V = 24 BURSTER ------------------------------------------------------------------------------------------------------------------------------------ 3 AG GW COUNTERPART V = 25 ------------------------------------------------------------------------------------------------------------------------------------ 17450( 5) - 23-Aug-2025 01:21:15 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 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 ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17450( 5) - 23-Aug-2025 01:21:15 - [ 6] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 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 ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 7 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 1.5 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 6 Primary_Pattern Secondary_Pattern Pattern_Type LINE WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER DITHER Number_Of_Points 2 4 Point_Spacing 1 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 5 18.528 Angle_Between_Sides 74.653 Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ 17450( 5) - 23-Aug-2025 01:21:15 - [ 7] Visit: 01 (UVKN) Visit Requirements: ON HOLD ; TOO RESPONSE TIME 2.0D On Hold Comments: GW counterpart with optical detection 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 UVKN WFC3/UVI ACCUM UVIS F300X FLASH=19 1 450 S (900 PATTERN 2 1 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UVKN WFC3/UVI ACCUM UVIS G280 CR-SPLIT=NO 1 600 S PATTERN 6 2 S (4800 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 | ------------------------------------------------------------------------------------------------------------------------------------ UVKN 1 WFC3/UVI ACCUM UVIS F300X 1 none none none 1 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F300X 2 none none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 1 1 none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 1 2 none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 1 3 none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 1 4 none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 2 1 none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 2 2 none none 3 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 2 3 none none 3 N/A S UVKN 2 WFC3/UVI ACCUM UVIS G280 2 4 none none 3 N/A S 17450( 5) - 23-Aug-2025 01:21:15 - [ 8] Visit: 02 (UVKN) Visit Requirements: ON HOLD ; TOO RESPONSE TIME 2.0D On Hold Comments: GW counterpart with optical detection 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 UVKN WFC3/UVI ACCUM UVIS F336W FLASH=19, CR-SPLIT=NO 1 480 S PATTERN 1 1-2 S (1920 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UVKN WFC3/UVI ACCUM UVIS F275W FLASH=19, CR-SPLIT=NO 1 480 S S (1920 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 | ------------------------------------------------------------------------------------------------------------------------------------ UVKN 1 WFC3/UVI ACCUM UVIS F336W 1 none none none 1 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F336W 2 none none none 1 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F336W 3 none none none 2 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F336W 4 none none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 1 none none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 2 none none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 3 none none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 4 none none none 2 N/A S 17450( 5) - 23-Aug-2025 01:21:15 - [ 9] Visit: 03 (UVKN) Visit Requirements: ON HOLD ; TOO RESPONSE TIME 2.0D On Hold Comments: GW counterpart with optical detection 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 UVKN WFC3/UVI ACCUM UVIS F336W FLASH=19, CR-SPLIT=NO 1 560 S PATTERN 1 1-2 S (2240 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UVKN WFC3/UVI ACCUM UVIS F275W FLASH=19, CR-SPLIT=NO 1 560 S S (2240 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 | ------------------------------------------------------------------------------------------------------------------------------------ UVKN 1 WFC3/UVI ACCUM UVIS F336W 1 none none none 1 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F336W 2 none none none 1 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F336W 3 none none none 2 N/A S UVKN 1 WFC3/UVI ACCUM UVIS F336W 4 none none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 1 none none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 2 none none none 1 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 3 none none none 2 N/A S UVKN 2 WFC3/UVI ACCUM UVIS F275W 4 none none none 2 N/A S 17450( 5) - 23-Aug-2025 01:21:15 - [ 10] Visit: 04 (IRKN) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 IRKN WFC3/IR MULTIAC GRISM1024 F110W NSAMP=8, SAMP-SEQ=STEP50 1 DEF PATTERN 5 1 CUM (447.693 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IRKN WFC3/IR MULTIAC GRISM1024 G102 NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 5 2 CUM (1658.812 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 | ------------------------------------------------------------------------------------------------------------------------------------ IRKN 1 WFC3/IR MULTIAC GRISM102 F110W 1 none none none 1 N/A CUM 4 IRKN 1 WFC3/IR MULTIAC GRISM102 F110W 2 none none none 1 N/A CUM 4 IRKN 1 WFC3/IR MULTIAC GRISM102 F110W 3 none none none 1 N/A CUM 4 IRKN 2 WFC3/IR MULTIAC GRISM102 G102 1 none none none 1 N/A CUM 4 IRKN 2 WFC3/IR MULTIAC GRISM102 G102 2 none none none 1 N/A CUM 4 IRKN 2 WFC3/IR MULTIAC GRISM102 G102 3 none none none 1 N/A CUM 4 17450( 5) - 23-Aug-2025 01:21:15 - [ 11] Visit: 05 (IRKN) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 IRKN WFC3/IR MULTIAC GRISM1024 F160W NSAMP=8, SAMP-SEQ=STEP50 1 DEF PATTERN 5 1 CUM (447.693 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IRKN WFC3/IR MULTIAC GRISM1024 G141 NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 5 2 CUM (1658.812 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 | ------------------------------------------------------------------------------------------------------------------------------------ IRKN 1 WFC3/IR MULTIAC GRISM102 F160W 1 none none none 1 N/A CUM 4 IRKN 1 WFC3/IR MULTIAC GRISM102 F160W 2 none none none 1 N/A CUM 4 IRKN 1 WFC3/IR MULTIAC GRISM102 F160W 3 none none none 1 N/A CUM 4 IRKN 2 WFC3/IR MULTIAC GRISM102 G141 1 none none none 1 N/A CUM 4 IRKN 2 WFC3/IR MULTIAC GRISM102 G141 2 none none none 1 N/A CUM 4 IRKN 2 WFC3/IR MULTIAC GRISM102 G141 3 none none none 1 N/A CUM 4 17450( 5) - 23-Aug-2025 01:21:15 - [ 12] Visit: 06 (IRKN) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 IRKN WFC3/IR MULTIAC IR F105W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 4 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 | ------------------------------------------------------------------------------------------------------------------------------------ IRKN 1 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F105W 4 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 13] Visit: 07 (IRKN) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 IRKN WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 4 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 | ------------------------------------------------------------------------------------------------------------------------------------ IRKN 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 14] Visit: 08 (IRKN) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 IRKN WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 4 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 | ------------------------------------------------------------------------------------------------------------------------------------ IRKN 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM IRKN 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 15] Visit: 09 (AG) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 AG WFC3/IR MULTIAC IR F110W NSAMP=6, SAMP-SEQ=SPARS50 1 DEF PATTERN 4 1-2 CUM (1011.738 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AG WFC3/IR MULTIAC IR F160W NSAMP=6, SAMP-SEQ=SPARS50 1 DEF CUM (1011.738 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 | ------------------------------------------------------------------------------------------------------------------------------------ AG 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM AG 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM AG 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM AG 1 WFC3/IR MULTIAC IR F110W 4 none none none 1 N/A CUM AG 2 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM AG 2 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM AG 2 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM AG 2 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 16] Visit: 10 (AG) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 AT2025ULZ WFC3/UVI ACCUM UVIS2 F814W FLASH=9 1 525 S PATTERN 1 1 S (2100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AT2025ULZ WFC3/UVI ACCUM UVIS2 F606W 1 240 S PATTERN 1 2 S see below (2100 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F814W 1 none none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F814W 2 none none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F814W 3 none none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F814W 4 none none none 1 N/A S AT2025ULZ 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 525.0 S S AT2025ULZ 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 525.0 S S AT2025ULZ 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 525.0 S S AT2025ULZ 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 525.0 S S 17450( 5) - 23-Aug-2025 01:21:15 - [ 17] Visit: 11 (TEMPLATE_AG_10) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 21.0D On Hold Comments: Awaiting GW 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 AG WFC3/UVI ACCUM UVIS1 F814W FLASH=9 1 525 S PATTERN 1 1 S (2100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AG WFC3/UVI ACCUM UVIS2 F606W 1 240 S PATTERN 1 2 S see below (2100 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 | ------------------------------------------------------------------------------------------------------------------------------------ AG 1 WFC3/UVI ACCUM UVIS1 F814W 1 none none none 1 N/A S AG 1 WFC3/UVI ACCUM UVIS1 F814W 2 none none none 1 N/A S AG 1 WFC3/UVI ACCUM UVIS1 F814W 3 none none none 1 N/A S AG 1 WFC3/UVI ACCUM UVIS1 F814W 4 none none none 1 N/A S AG 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 525.0 S S AG 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 525.0 S S AG 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 525.0 S S AG 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 525.0 S S 17450( 5) - 23-Aug-2025 01:21:15 - [ 18] Visit: 12 (UVKN) Visit Requirements: 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 AT2025ULZ WFC3/UVI ACCUM UVIS2-C1K F606W CR-SPLIT=NO, FLASH=19 1 60 S (120 PATTERN 2 1 S 1C-CTE 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2025ULZ 1 WFC3/UVI ACCUM UVIS2-C1 F606W 1 none none none 1 N/A S K1C-CTE AT2025ULZ 1 WFC3/UVI ACCUM UVIS2-C1 F606W 2 none none none 1 N/A S K1C-CTE 17450( 5) - 23-Aug-2025 01:21:15 - [ 19] Visit: 14 (IRKN) 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 AT2025ULZ WFC3/IR MULTIAC IR F110W NSAMP=10, SAMP-SEQ=SPARS5 1 DEF PATTERN 5 1 CUM (143.818 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2025ULZ 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 20] Visit: 15 (IRKN) 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 AT2025ULZ WFC3/IR MULTIAC IR F160W NSAMP=10, SAMP-SEQ=SPARS5 1 DEF PATTERN 5 1 CUM (143.818 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2025ULZ 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 21] Visit: 16 (IRKN) 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 AT2025ULZ WFC3/IR MULTIAC IR F110W NSAMP=10, SAMP-SEQ=SPARS5 1 DEF PATTERN 7 1 CUM (143.818 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2025ULZ 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 22] Visit: 18 (IRKN) 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 AT2025ULZ WFC3/IR MULTIAC IR F160W NSAMP=10, SAMP-SEQ=SPARS5 1 DEF PATTERN 7 1 CUM (143.818 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2025ULZ 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM AT2025ULZ 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM 17450( 5) - 23-Aug-2025 01:21:15 - [ 23] Summary Form for Proposal 17450 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures GRISM1024, IR, UVIS, UVIS1, UVIS2, UVIS2-C1K1C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=19, FLASH=9, NSAMP=10, NSAMP=12, NSAMP=6, NSAMP=8, SAMP-SEQ=SPARS5, SAMP-SEQ=SPARS50, SAMP-SEQ=STEP50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ON HOLD , PATTERN 1 1, PATTERN 1 1-2, PATTERN 1 2, PATTERN 2 1, PATTERN 4 1, PATTERN 4 1-2, PATTERN 5 1, PATTERN 5 2, PATTERN 6 2, PATTERN 7 1, SCHED 100%, TOO RESPONSE TIME 2.0D, TOO RESPONSE TIME 21.0D, TOO RESPONSE TIME 3.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F105W, F110W, F125W, F160W, F275W, F300X, F336W, F606W, F814W, G102, G141, G280 ------------------------------------------------------------------------------------------------------------------------------------ Target Names AG, AT2025ULZ, IRKN, UVKN ------------------------------------------------------------------------------------------------------------------------------------