17298( 5) - 19-Apr-2023 16:15:20 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17298 Version: 5 Check-in Time: 19-Apr-2023 16:15:20 STScI Edit Number: 1 Title The afterglow, supernova and distance scale of a record-breaking gamma-ray burst ------------------------------------------------------------------------------------ Type Cycle GO/DD 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Eleonora Troja Universita di Roma Tor Vergata Y CoI: Simone Dichiara The Pennsylvania State University N CoI: Brendan O'Connor George Washington University N CoI: Prof. Myungshin Im Seoul National University N CoI: Dr. Yuhan Yang Universita di Roma Tor Vergata N CoI: Dr. James Herbert Gillanders Universita di Roma Tor Vergata N ------------------------------------------------------------------------------------ Abstract The recent GRB230307A is the second brightest gamma-ray burst (GRB) of all times, and it is likely one of the most (if not the most) energetic explosions ever recorded. The expected rate of similar bright bursts is once per 100 years, and the goal of this proposal is to exploit this unique opportunity to its fullest. The requested HST observations will allow us to determine the outflow collimation, search for the associated supernova, and constrain the GRB distance scale. These are crucial measurements for a complete physical picture of this extreme explosion, and will allow us to compare its intrinsic properties to the general population of GRBs. HST data are essential because of the target faintness and unfavorable position for ground-based observatories. Moreover, thanks to its superb angular resolution, HST will precisely pinpoint the GRB position within its host galaxy, costraining models of progenitor systems. These observations will be a critical component of an on-going multi-wavelength campaign, comprising X-ray, optical, nIR and radio observations. ------------------------------------------------------------------------------------ Observations Description ------------------------ This DD proposal was approved for 3 orbits. We request VISIT 1 to include 2 ORBITS, one with WFC3/UVIS camera (F606W/F814W) and the other one with WFC3/IR camera (F105W/F140W). This visit should be schedule within 30 days from the GRB (April 7). VISIT 2 includes 1 ORBIT with the WFC3/IR camera (F105W/F140W). To be performed 20 days after the first visit (April 25-30). ------------------------------------------------------------------------------------ 17298( 5) - 19-Apr-2023 16:15:20 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB230307A STAR, GAMMA RAY BURSTER RA=04H03M25.9900S +/- 0.5", J2000 V = 20 DEC=-75D22'42.82" +/- 0.5" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 17298( 5) - 19-Apr-2023 16:15:20 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 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: 3 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: 5 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 ------------------------------------------------------------------------------------------------------------------------------------ 17298( 5) - 19-Apr-2023 16:15:20 - [ 4] Visit: 01 (V1UVIS) Visit Requirements: ORIENT 100D TO 130 D; ORIENT 150D TO 210 D; TOO RESPONSE TIME 8.0D 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 GRB230307A WFC3/UVI ACCUM UVIS2-C1K F606W CR-SPLIT=NO, FLASH=9 1 300 S PATTERN 3 1 S 1C-SUB (1200 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB230307A WFC3/UVI ACCUM UVIS2-C1K F606W CR-SPLIT=NO, FLASH=9 1 320 S PATTERN 3 2 S 1C-SUB (1280 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB230307A 1 WFC3/UVI ACCUM UVIS2-C1 F606W 1 none none none 1 N/A S K1C-SUB GRB230307A 1 WFC3/UVI ACCUM UVIS2-C1 F606W 2 none none none 1 N/A S K1C-SUB GRB230307A 1 WFC3/UVI ACCUM UVIS2-C1 F606W 3 none none none 1 N/A S K1C-SUB GRB230307A 1 WFC3/UVI ACCUM UVIS2-C1 F606W 4 none none none 1 N/A S K1C-SUB GRB230307A 2 WFC3/UVI ACCUM UVIS2-C1 F606W 1 none none none 1 N/A S K1C-SUB GRB230307A 2 WFC3/UVI ACCUM UVIS2-C1 F606W 2 none none none 1 N/A S K1C-SUB GRB230307A 2 WFC3/UVI ACCUM UVIS2-C1 F606W 3 none none none 1 N/A S K1C-SUB GRB230307A 2 WFC3/UVI ACCUM UVIS2-C1 F606W 4 none none none 1 N/A S K1C-SUB 17298( 5) - 19-Apr-2023 16:15:20 - [ 5] Visit: 02 (V1IR) Visit Requirements: ORIENT 100D TO 130 D; ORIENT 150D TO 210 D; TOO RESPONSE TIME 8.0D 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 GRB230307A WFC3/IR MULTIAC IR F140W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB230307A WFC3/IR MULTIAC IR F105W NSAMP=11, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 2 CUM (1508.81 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB230307A 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB230307A 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB230307A 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB230307A 2 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM GRB230307A 2 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM GRB230307A 2 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM 17298( 5) - 19-Apr-2023 16:15:20 - [ 6] Visit: 05 (V2IR) Visit Requirements: ORIENT 150D TO 210 D; BETWEEN 18-APR-2023:00:00:00 AND 03-MAY-2023:00:00:00; TOO RESPONSE TIME 22.0D 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 GRB230307A WFC3/IR MULTIAC IR F140W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF PATTERN 5 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB230307A WFC3/IR MULTIAC IR F105W NSAMP=11, SAMP-SEQ=SPARS50 1 DEF PATTERN 5 2 CUM (1508.81 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB230307A 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB230307A 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB230307A 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB230307A 2 WFC3/IR MULTIAC IR F105W 1 none none none 1 N/A CUM GRB230307A 2 WFC3/IR MULTIAC IR F105W 2 none none none 1 N/A CUM GRB230307A 2 WFC3/IR MULTIAC IR F105W 3 none none none 1 N/A CUM 17298( 5) - 19-Apr-2023 16:15:20 - [ 7] Summary Form for Proposal 17298 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=9, NSAMP=11, NSAMP=9, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 18-APR-2023:00:00:00 AND 03-MAY-2023:00:00:00, ORIENT 100D TO 130 D, ORIENT 150D TO 210 D, PATTERN 2 1, PATTERN 2 2, PATTERN 3 1, PATTERN 3 2, PATTERN 5 1, PATTERN 5 2, TOO RESPONSE TIME 22.0D, TOO RESPONSE TIME 8.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F105W, F140W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB230307A ------------------------------------------------------------------------------------------------------------------------------------