17278( 8) - 12-Sep-2023 18:05:53 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17278 Version: 8 Check-in Time: 12-Sep-2023 18:05:53 STScI Edit Number: 0 Title Testing the Limit: Late-time HST Observations of the Most Energetic GRB Ever ------------------------------------------------------------------------------------ Type Cycle GO 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Ryan Chornock University of California - Berkeley Y CoI: Dr. Raffaella Margutti University of California - Berkeley N CoI: Prof. Edo Berger Harvard University N CoI: Dr. Kate Denham Alexander University of Arizona N CoI: Dr. Peter Blanchard Northwestern University N CoI: Dr. Ashley Villar The Pennsylvania State University N CoI: Huei Sears Northwestern University N CoI: Natalie LeBaron University of California - Berkeley N CoI: Dr. Dan Milisavljevic Purdue University N CoI: Mr. Wynn Vicente Jacobson-Galan University of California - Berkeley N CoI: Dr. Tanmoy Laskar University of Utah N ------------------------------------------------------------------------------------ Abstract We propose to capitalize on the unique opportunity of acquiring deep multi-band HST observations of the most energetic GRB ever detected. With a prompt gamma-ray duration of thousands of seconds, and discovered in the very nearby universe (z=0.151) GRB 221009A saturated most GRB detectors and was accompanied by one of the brightest radio, optical and X-ray afterglows detected to date. Here we propose late-time HST observations at ~200-350 days after trigger to monitor the evolution of this unprecedented event at optical-NIR wavelengths as part of a multi-wavelength campaign across the spectrum. The immediate goals are to constrain the progenitor system and the intrinsic energetics of this burst. Additionally, the large gamma-ray energy release is suggestive of a massive accretion disk and opens the possibility for the first meaningful investigation of r-process nucleosynthesis in collapsars. HST mid-cycle 30 observations are essential for this remarkable object as it will fade by the time of Cycle 31. ------------------------------------------------------------------------------------ Observations Description ------------------------ This proposal consists of 11 total orbits spread across 3 epochs. The goal is to measure the SED of the fading GRB afterglow+supernova, so the three epochs need to be adequately spaced. Visit 1 (3 orbits): 2 orbits with UVIS/F814W and UVIS/F606W, 1 orbit with both IR/F110W and IR/F160W. Visit 2 (3 orbits): 2 orbits with UVIS/F814W, and one orbit to get both IR/F110W and IR/F160W. Visit 3 (3 orbits): 3 orbits of UVIS/F814W Visit 4 (2 orbits): one orbit each of IR/F110W and IR/F160W. 17278( 8) - 12-Sep-2023 18:05:53 - [ 2] [I have split the third epoch into 2 visits to enhance schedulability, with a restriction that they be taken within 7 days of each other] There are four visibility windows for this source during Cycle 30. In order to schedule three epochs of observations with adequate spacing, we request that Visit 1 be scheduled during the first visibility window (31 March 2023 to 15 April 2023). The second visit should be scheduled during either of the next two visibility windows (either 29 May to 8 June or 12 July to 17 July). The third epoch (Visits 3 and 4) should then be scheduled during the final visibility window (after 14 Aug 2023). ------------------------------------------------------------------------------------ 17278( 8) - 12-Sep-2023 18:05:53 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB221009A EXT-STAR, GAMMA RAY RA=19H13M3.5008S +/- 0.0001", J2000 V = 24 fading BURSTER DEC=+19D46'24.23" +/- 0.0001" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17278( 8) - 12-Sep-2023 18:05:53 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 6 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-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 ------------------------------------------------------------------------------------------------------------------------------------ 17278( 8) - 12-Sep-2023 18:05:53 - [ 5] Visit: 01 Visit Requirements: BEFORE 30-APR-2023:00:00:00 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 GRB221009A WFC3/UVI ACCUM UVIS2-C51 F814W 1 750 S PATTERN 1 1-2 S 2C-SUB see below (2548 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB221009A WFC3/UVI ACCUM UVIS2-C51 F606W 1 800 S S 2C-SUB see below (2678 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.000, 0.000; CUM (402.936 SEQ 3-8 NON-INT S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.451, 0.403 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.451, 0.403 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.000, 0.000 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.902, 0.806 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.902, 0.806 CUM (402.936 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 1 none none none 1 856.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 2 none none none 1 856.0 S S 12C-SUB 17278( 8) - 12-Sep-2023 18:05:53 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 3 none none none 2 836.0 S S 12C-SUB GRB221009A 2 WFC3/UVI ACCUM UVIS2-C5 F606W 1 none none none 1 906.0 S S 12C-SUB GRB221009A 2 WFC3/UVI ACCUM UVIS2-C5 F606W 2 none none none 2 886.0 S S 12C-SUB GRB221009A 2 WFC3/UVI ACCUM UVIS2-C5 F606W 3 none none none 2 886.0 S S 12C-SUB GRB221009A 3 WFC3/IR MULTIAC IR F160W none none none none 3 N/A CUM GRB221009A 4 WFC3/IR MULTIAC IR F160W none none none none 3 N/A CUM GRB221009A 5 WFC3/IR MULTIAC IR F110W none none none none 3 N/A CUM GRB221009A 6 WFC3/IR MULTIAC IR F110W none none none none 3 N/A CUM GRB221009A 7 WFC3/IR MULTIAC IR F110W none none none none 3 N/A CUM GRB221009A 8 WFC3/IR MULTIAC IR F160W none none none none 3 N/A CUM 17278( 8) - 12-Sep-2023 18:05:53 - [ 7] Visit: 02 Visit Requirements: BETWEEN 01-MAY-2023:00:00:00 AND 31-JUL-2023:00:00:00 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 GRB221009A WFC3/UVI ACCUM UVIS2-C51 F814W 1 1150 S PATTERN 4 1 S 2C-SUB see below (5420 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.000, 0.000; CUM (402.936 SEQ 2-7 NON-INT S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.451, 0.403 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.451, 0.403 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.000, 0.000 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.902, 0.806 CUM (402.936 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.902, 0.806 CUM (402.936 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 1 none none none 1 1357.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 2 none none none 1 1357.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 3 none none none 2 1353.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 4 none none none 2 1353.0 S S 12C-SUB 17278( 8) - 12-Sep-2023 18:05:53 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 2 WFC3/IR MULTIAC IR F160W none none none none 3 N/A CUM GRB221009A 3 WFC3/IR MULTIAC IR F160W none none none none 3 N/A CUM GRB221009A 4 WFC3/IR MULTIAC IR F110W none none none none 3 N/A CUM GRB221009A 5 WFC3/IR MULTIAC IR F110W none none none none 3 N/A CUM GRB221009A 6 WFC3/IR MULTIAC IR F110W none none none none 3 N/A CUM GRB221009A 7 WFC3/IR MULTIAC IR F160W none none none none 3 N/A CUM 17278( 8) - 12-Sep-2023 18:05:53 - [ 9] Visit: 03 Visit Requirements: AFTER 01-AUG-2023:00:00:00; SEQ 03, 04 WITHIN 7 D 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 GRB221009A WFC3/UVI ACCUM UVIS2-C51 F814W 1 1250 S PATTERN 3 1 S 2C-SUB see below (8126 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 1 none none none 1 1357.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 2 none none none 1 1357.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 3 none none none 2 1353.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 4 none none none 2 1353.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 5 none none none 3 1353.0 S S 12C-SUB GRB221009A 1 WFC3/UVI ACCUM UVIS2-C5 F814W 6 none none none 3 1353.0 S S 12C-SUB 17278( 8) - 12-Sep-2023 18:05:53 - [ 10] Visit: 04 Visit Requirements: AFTER 01-AUG-2023:00:00:00; SEQ 03, 04 WITHIN 7 D 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 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG 0.000, 0.000; CUM (602.934 SEQ 1-4 NON-INT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.000, 0.000 CUM (652.938 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.542, 0.182 CUM (652.938 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG 0.542, 0.182 CUM (602.934 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG 0.339, 0.485; CUM (602.934 SEQ 5-8 NON-INT S) ------------------------------------------------------------------------------------------------------------------------------------ 6 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.339, 0.485 CUM (652.938 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF POS TARG -0.203, 0.303 CUM (652.938 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG -0.203, 0.303 CUM (602.934 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM GRB221009A 2 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM 17278( 8) - 12-Sep-2023 18:05:53 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM GRB221009A 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM GRB221009A 5 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM GRB221009A 6 WFC3/IR MULTIAC IR F110W none none none none 2 N/A CUM GRB221009A 7 WFC3/IR MULTIAC IR F110W none none none none 2 N/A CUM GRB221009A 8 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM 17278( 8) - 12-Sep-2023 18:05:53 - [ 12] Visit: 05 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG 0.339, 0.485; CUM (602.934 SEQ 1-4 NON-INT S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.339, 0.485 CUM (652.938 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB221009A WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=SPARS50 1 DEF POS TARG -0.203, 0.303 CUM (652.938 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB221009A WFC3/IR MULTIAC IR F160W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG -0.203, 0.303 CUM (602.934 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB221009A 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM GRB221009A 2 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM GRB221009A 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM GRB221009A 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM 17278( 8) - 12-Sep-2023 18:05:53 - [ 13] Summary Form for Proposal 17278 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS2-C512C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=14, NSAMP=7, NSAMP=9, SAMP-SEQ=SPARS100, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01-AUG-2023:00:00:00, BEFORE 30-APR-2023:00:00:00, BETWEEN 01-MAY-2023:00:00:00 AND 31-JUL-2023:00:00:00, PATTERN 1 1-2, PATTERN 3 1, PATTERN 4 1, POS TARG -0.203, 0.303, POS TARG 0.000, 0.000, POS TARG 0.339, 0.485, POS TARG 0.451, 0.403, POS TARG 0.542, 0.182, POS TARG 0.902, 0.806, SEQ 03, 04 WITHIN 7 D, SEQ 1-4 NON-INT, SEQ 2-7 NON-INT, SEQ 3-8 NON-INT, SEQ 5-8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F160W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB221009A ------------------------------------------------------------------------------------------------------------------------------------