17583( 5) - 22-Aug-2025 19:01:30 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17583 Version: 5 Check-in Time: 22-Aug-2025 19:01:30 STScI Edit Number: 1 Title Understanding the Hubble tension and jet physics through joint electromagnetic and gravitational wave observations of a neutron star merger ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Brendan O'Connor Carnegie Mellon University Y CoI: Dr. Antonella Palmese Carnegie Mellon University Y CoI: Dr. Armin Rest Space Telescope Science Institute N CoI: Dr. Ori Dosovitz Fox Space Telescope Science Institute N CoI: Dr. Geoffrey Ryan Perimeter Institute for Theoretical N Physics CoI: Dr. Paz Beniamini The Open University of Israel N CoI: Tomas Cabrera Carnegie Mellon University N CoI: Ms. Keerthi Kunnumkai Carnegie Mellon University N CoI: Dr. David Coulter Space Telescope Science Institute N CoI: Dr. Charles Kilpatrick Northwestern University N CoI: Prof. Ryan Foley University of California - Santa Cruz N CoI: Prof. Gautham Narayan University of Illinois at Urbana - N Champaign CoI: Maria Drout University of Toronto N CoI: Aaron Tohuvavohu California Institute of Technology N CoI: Dr. Lei Hu Carnegie Mellon University N CoI: Ariel Jacob Amsellem Carnegie Mellon University N ------------------------------------------------------------------------------------ Abstract The field of gravitational wave (GW) astronomy burst into life after the detection of the first binary black hole merger event by LIGO in 2015. Only two years later, the discovery of the first electromagnetic counterpart to a gravitational wave event, GW170817, revolutionized our understanding of short duration gamma-ray bursts (GRBs) and relativistic jets. Electromagnetic observations of the resulting afterglow emission, arising from the interaction of the jet with the surrounding environment, provided further constraints to the source's viewing angle and distance, breaking the degeneracy in the GW data, and allowing for a precise, and independent, measurement of the Hubble Constant. A sample of ~10 similar events will relieve the so-called Hubble tension. In this program, we propose Hubble Space Telescope observations of a neutron star merger identified through GWs in order to constrain the structure of the GRB jet, its viewing angle, and, in turn, the Hubble constant, through direct observations of the the jet's afterglow emission. This program represents a step towards reaching the ~10 events required for a precision cosmology measurement, and the only opportunity to perform this scientific analysis before 2028. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a long-term target of opportunity (ToO) program to study the electromagnetic counterparts of neutron star (NS) mergers discovered in the 17583( 5) - 22-Aug-2025 19:01:30 - [ 2] LIGO-Virgo-KAGRA (LVK) O4 observing run. The observations are non-disruptive, and comprise 28 orbits spread across two separate NS mergers (2x14 orbits) with 5 epochs of observation each. The baseline plan is that the first three visits utilize two orbits each, whereas the final two visits use four orbits each (2+2+2+4+4 = 14 orbits per target). We have waived our proprietary data rights due to the massive community interest in this topic. ------------------------------------------------------------------------------------ 17583( 5) - 22-Aug-2025 19:01:30 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 3 AT2025ULZ STAR, JET, NEUTRON STAR RA=15H51M54.1900S +/- 0.2", J2000 V = 27 DEC=+30D54'8.59" +/- 0.20" Reference Frame: ICRS Extended: YES Comments: The source lies on top of a galaxy and is therefore noted as being extended. However, the transient itself is a point source. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17583( 5) - 22-Aug-2025 19:01:30 - [ 4] TARGET LIST Generic Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Selection Criteria | Flux data No | Name | Description | | ------------------------------------------------------------------------------------------------------------------------------------ 1 GW-AFTERGLOW GW COUNTERPART CANDIDATE V = 26 +/- 1 -1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLOW GW COUNTERPART CANDIDATE V = 26 +/- 1 -2 ------------------------------------------------------------------------------------------------------------------------------------ 17583( 5) - 22-Aug-2025 19:01:30 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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 ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 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: 3 Primary_Pattern Secondary_Pattern Pattern_Type LINE WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER DITHER Number_Of_Points 2 4 Point_Spacing 0.7 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 42 18.528 Angle_Between_Sides 74.653 Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type LINE WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER DITHER Number_Of_Points 2 4 Point_Spacing 0.145 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 46.84 23.884 Angle_Between_Sides 81.785 Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ 17583( 5) - 22-Aug-2025 19:01:30 - [ 6] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 Primary_Pattern Secondary_Pattern Pattern_Type LINE WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER DITHER Number_Of_Points 4 4 Point_Spacing 0.145 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 46.84 23.884 Angle_Between_Sides 81.785 Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 6 Primary_Pattern Secondary_Pattern Pattern_Type LINE WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER DITHER Number_Of_Points 4 4 Point_Spacing 0.7 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 42 18.528 Angle_Between_Sides 74.653 Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ 17583( 5) - 22-Aug-2025 19:01:30 - [ 7] Visit: 01 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 W-1 CUM (2211.749 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 2 2 W-1 S (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 8] Visit: 02 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 W-1 CUM (2211.749 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 2 2 W-1 S (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 9] Visit: 03 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W NSAMP=6, SAMP-SEQ=SPARS100 1 DEF PATTERN 1 1 W-1 CUM (2011.736 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 2 2 W-1 S (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 10] Visit: 04 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 3 1 W-1 CUM (4423.498 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 4 2 W-1 S (4400 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 1 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 4 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 11] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 4 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 12] Visit: 05 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 3 1 W-1 CUM (4423.498 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 4 2 W-1 S (4400 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 1 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 3 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 4 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 13] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 4 N/A S GW-AFTERGLOW-1 2 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 14] Visit: 06 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 3 1 W-1 CUM (4423.498 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM 17583( 5) - 22-Aug-2025 19:01:30 - [ 15] Visit: 07 Visit Requirements: 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 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 4 1 W-1 S (4400 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 1 1 none none 1 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 1 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 1 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 1 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 2 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 2 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 2 N/A S GW-AFTERGLOW-1 1 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 16] Visit: 08 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 6 1 W-1 CUM (8846.996 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 1 none none 3 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 2 none none 3 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 3 none none 3 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 3 4 none none 3 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 1 none none 4 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 2 none none 4 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 3 none none 4 N/A CUM GW-AFTERGLOW-1 1 WFC3/IR MULTIAC IR F160W 4 4 none none 4 N/A CUM 17583( 5) - 22-Aug-2025 19:01:30 - [ 17] Visit: 09 Visit Requirements: BETWEEN 26-DEC-2025:00:00:00 AND 05-JAN-2026:00:00:00; 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 F606W CR-SPLIT=NO 1 550 S PATTERN 5 1 S (8800 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 F606W 1 1 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 1 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 2 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 3 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 4 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 1 none none 4 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 2 none none 4 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 3 none none 4 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 4 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 18] Visit: 10 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 W-2 CUM (2211.749 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 2 2 W-2 S (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 19] Visit: 11 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 W-2 CUM (2211.749 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 2 2 W-2 S (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 20] Visit: 12 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 1 W-2 CUM (2211.749 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 2 2 W-2 S (2200 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 3 none none none 2 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 4 none none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 21] Visit: 13 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 3 1 W-2 CUM (4423.498 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 4 2 W-2 S (4400 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 1 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 4 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 22] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 4 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 23] Visit: 14 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 3 1 W-2 CUM (4423.498 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 4 2 W-2 S (4400 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 1 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 3 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 4 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 24] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 4 N/A S GW-AFTERGLOW-2 2 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 25] Visit: 15 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 3 1 W-2 CUM (4423.498 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM 17583( 5) - 22-Aug-2025 19:01:30 - [ 26] Visit: 16 Visit Requirements: 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 GW-AFTERGLO WFC3/UVI ACCUM UVIS2 F606W CR-SPLIT=NO 1 550 S PATTERN 4 1 W-2 S (4400 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 1 1 none none 1 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 1 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 1 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 1 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 2 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 2 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 2 N/A S GW-AFTERGLOW-2 1 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 2 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 27] Visit: 17 Visit Requirements: 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 GW-AFTERGLO WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=12 1 DEF PATTERN 6 1 W-2 CUM (8846.996 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 | ------------------------------------------------------------------------------------------------------------------------------------ GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 1 none none 3 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 2 none none 3 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 3 none none 3 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 3 4 none none 3 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 1 none none 4 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 2 none none 4 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 3 none none 4 N/A CUM GW-AFTERGLOW-2 1 WFC3/IR MULTIAC IR F160W 4 4 none none 4 N/A CUM 17583( 5) - 22-Aug-2025 19:01:30 - [ 28] Visit: 18 Visit Requirements: BETWEEN 15-FEB-2026:00:00:00 AND 16-MAR-2026:00:00:00; 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 F606W CR-SPLIT=NO 1 550 S PATTERN 5 1 S (8800 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 F606W 1 1 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 1 2 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 1 3 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 1 4 none none 1 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 1 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 2 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 3 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 2 4 none none 2 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 1 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 2 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 3 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 3 4 none none 3 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 1 none none 4 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 2 none none 4 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 3 none none 4 N/A S AT2025ULZ 1 WFC3/UVI ACCUM UVIS2 F606W 4 4 none none 4 N/A S 17583( 5) - 22-Aug-2025 19:01:30 - [ 29] Summary Form for Proposal 17583 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=12, NSAMP=6, SAMP-SEQ=SPARS100, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 15-FEB-2026:00:00:00 AND 16-MAR-2026:00:00:00, BETWEEN 26-DEC-2025:00:00:00 AND 05-JAN-2026:00:00:00, ON HOLD , PATTERN 1 1, PATTERN 2 2, PATTERN 3 1, PATTERN 4 1, PATTERN 4 2, PATTERN 5 1, PATTERN 6 1, TOO RESPONSE TIME 21.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names AT2025ULZ, GW-AFTERGLOW-1, GW-AFTERGLOW-2 ------------------------------------------------------------------------------------------------------------------------------------