17396( 2) - 28-Jul-2023 12:17:17 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17396 Version: 2 Check-in Time: 28-Jul-2023 12:17:17 STScI Edit Number: 0 Title Revealing the progenitor of the dirty fireball gamma-ray burst AT 2023lcr through its supernova component ------------------------------------------------------------------------------------ Type Cycle GO/DD 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Antonio Martin-Carrillo University College Dublin Y CoI: Dr. Tanmoy Laskar University of Utah N CoI: Dr. Benjamin Paul Gompertz University of Birmingham N CoI: Dr. Antonio de Ugarte Postigo Observatoire de la Cote d'Azur N CoI: Dr. Daniele Bjorn Malesani Radboud Universiteit Nijmegen N CoI: Dr. Andrea Rossi INAF-Osservatorio di Astrofisica e Scienza N dello Spazio CoI: Prof. Andrew James Levan Radboud Universiteit Nijmegen N CoI: Mr. Gabriel Finneran University College Dublin N CoI: Mr. Jose Feliciano Agui Fernandez Instituto de Astrofisica de Andalucia N (IAA) CoI: Dr. Benjamin Schneider Massachusetts Institute of Technology N CoI: Dr. Emeric Le Floc'h University of Arizona N CoI: Dr. Christina C. Thoene Czech Academy of Sciences N CoI: Dr. Amit Kumar The University of Warwick N CoI: Dr. Giancarlo Ghirlanda INAF, Osservatorio Astronomico di Brera, N Merate CoI: Dr. Valerio D'Elia INAF, Osservatorio Astronomico di Roma N CoI: Dr. C. Kouveliotou George Washington University N CoI: Prof. Dieter Hartmann Clemson University N CoI: Dr. Pall Jakobsson University of Iceland N CoI: Prof. Nial Rahil Tanvir University of Leicester N CoI: Dr. Rhaana L.C. Starling University of Leicester N CoI: Prof. Ralph A.M.J. Wijers Universiteit van Amsterdam N ------------------------------------------------------------------------------------ Abstract AT2023lcr is a transient at redshift 1.0272 with multi-wavelength observations consistent with an on-axis gamma-ray burst (GRB) afterglow with narrow jet. However, no gamma-ray prompt emission was detected in the direction of the transient making it the best dirty fireball candidate observed to date. Dirty fireballs are GRB with sub-relativistic jet unable to create the typical bright flash of gamma-ray radiation, known as GRB prompt emission, seen in typical GRBs. We propose using JWST's NIRCam and NIRSpec as well as HST's NIR camera, to study photometrically and spectroscopically the supernova (SN) component associated to this rare GRB case confirming its collapsar nature, with a total of 4.75 hours of JWST observations and 3 orbits of HST observations. The relatively high-redshift of this target makes the expected SN peak at around 1.2-1.4 microns. Additionally, the expected magnitudes of the SN component fall below the limits for ground-based telescopes, making JWST and HST uniquely suited for this detailed study. The SN spectral observations will reveal crucial information regarding the progenitor and its circumstellar environment. These data will allow us to determine, for the first time, if dirty fireballs come from progenitors similar to typical GRBs, improving our understanding 17396( 2) - 28-Jul-2023 12:17:17 - [ 2] of the role played by mildly relativistic jets during stellar collapse and how these rare cases fit in the full diversity of stellar explosions. ------------------------------------------------------------------------------------ Observations Description ------------------------ TBD ------------------------------------------------------------------------------------ 17396( 2) - 28-Jul-2023 12:17:17 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 AT2023LCR STAR, GAMMA RAY RA=16H31M37.4240S +/- 0.2", J2000 V = 26.4 +/- 0.2 BURSTER, SUPERNOVA DEC=+26D21'58.33" +/- 0.2" Reference Frame: ICRS Extended: NO Comments: We do not have a proper V-magnitude estimation of the brightness, however we have good J-band (AB) estimates. During the proposal we consider a worse case scenario where the expected magnitudes of the source would be 26.2, 26.57 and 26.98 for each epoch. Based on recent observations we could expect up to 1 magnitude brighter than this. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17396( 2) - 28-Jul-2023 12:17:17 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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 ------------------------------------------------------------------------------------------------------------------------------------ 17396( 2) - 28-Jul-2023 12:17:17 - [ 5] Visit: 01 (Orbit 1) Visit Requirements: BETWEEN 14-AUG-2023:00:00:00 AND 18-AUG-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 AT2023LCR WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 1 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AT2023LCR WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 1 2 CUM (1208.808 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2023LCR 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM AT2023LCR 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM AT2023LCR 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM 17396( 2) - 28-Jul-2023 12:17:17 - [ 6] Visit: 02 (Orbit 2) Visit Requirements: AFTER 01 BY 7 D TO 9 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 AT2023LCR WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 1 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AT2023LCR WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 1 2 CUM (1208.808 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2023LCR 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM AT2023LCR 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM AT2023LCR 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM 17396( 2) - 28-Jul-2023 12:17:17 - [ 7] Visit: 03 (Orbit 3) Visit Requirements: AFTER 02 BY 7 D TO 9 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 AT2023LCR WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 1 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AT2023LCR WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 1 2 CUM (1208.808 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT2023LCR 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM AT2023LCR 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM AT2023LCR 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM AT2023LCR 2 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM 17396( 2) - 28-Jul-2023 12:17:17 - [ 8] Summary Form for Proposal 17396 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=9, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 7 D TO 9 D, AFTER 02 BY 7 D TO 9 D, BETWEEN 14-AUG-2023:00:00:00 AND 18-AUG-2023:00:00:00, PATTERN 1 1, PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names AT2023LCR ------------------------------------------------------------------------------------------------------------------------------------