14357( 5) - 24-Jun-2016 20:58:53 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14357 Version: 5 Check-in Time: 24-Jun-2016 20:58:53 STScI Edit Number: 1 Title Identify the signature of neutron star mergers through rapid Chandra/Hubble observations of a short GRB ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Eleonora TROJA University of Maryland Y CoI: Dr. Stephen Bradley Cenko NASA Goddard Space Flight Center Y CoI: Dr. Taka Sakamoto Aoyama Gakuin University N CoI: Dr. Neil Gehrels NASA Goddard Space Flight Center N CoI: Nobuyuki Kawai Tokyo Institute of Technology - TIT N CoI: Dr. Amy Lien NASA Goddard Space Flight Center N ------------------------------------------------------------------------------------ Abstract The afterglow of some short GRBs displays a late-time rebrightening, visible a few days after the gamma-ray burst. Recent HST observations provided tantalizing evidence that such late-time bump could be explained as the emergence of the underlying kilonova emission. This would represent the incontrovertible signature of a neutron star merger, and the first direct link between short GRBs and their progenitors. Here we ask for a rapid and deep Chandra/HST follow-up observation of a short duration GRB in order to detect the expected kilonova bump, and to constrain the origin of the observed emission. Multi-band observations, and in particular X-rays, are critical to pin down the nature of the observed rebrightening, and to distinguish it from the standard afterglow emission. ------------------------------------------------------------------------------------ Observations Description ------------------------ We request two initial epochs to check for the kilonova onset. The third epoch will be planned at a later time if necessary. Each epoch will consist of three orbits. The first visit should happen in 3 days since the ToO activation. The second visit in 7 days since the ToO activation. The total request is 6 orbits. ------------------------------------------------------------------------------------ 14357( 5) - 24-Jun-2016 20:58:53 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SHORT-GRB EXT-STAR, GAMMA RAY RA=22H00M46.2144S +/- 2", J2000 V = 25.5 BURSTER DEC=+29D38'37.61" +/- 2" Reference Frame: Other: XRT Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 14357( 5) - 24-Jun-2016 20:58:53 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 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 ------------------------------------------------------------------------------------------------------------------------------------ 14357( 5) - 24-Jun-2016 20:58:53 - [ 4] Visit: 01 (VISIT1) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: GRB 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 SHORT-GRB ACS/WFC ACCUM WFC F606W 1 490 S PATTERN 1 1 (1960 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 | ------------------------------------------------------------------------------------------------------------------------------------ SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 1 none none none 1 N/A SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 2 none none none 1 N/A SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 3 none none none 1 N/A SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 4 none none none 1 N/A 14357( 5) - 24-Jun-2016 20:58:53 - [ 5] Visit: 02 (VISIT1) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: GRB 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 SHORT-GRB WFC3/IR MULTIAC IR F125W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 1 CUM (2411.751 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 | ------------------------------------------------------------------------------------------------------------------------------------ SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 14357( 5) - 24-Jun-2016 20:58:53 - [ 6] Visit: 03 (VISIT1) Visit Requirements: SCHED 100%; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: GRB 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 SHORT-GRB WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 1 CUM (2411.751 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 | ------------------------------------------------------------------------------------------------------------------------------------ SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 14357( 5) - 24-Jun-2016 20:58:53 - [ 7] Visit: 04 (VISIT2) Visit Requirements: SCHED 100%; AFTER 01 BY 4 D TO 6 D; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: GRB 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 SHORT-GRB ACS/WFC ACCUM WFC F606W 1 490 S PATTERN 1 1 (1960 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 | ------------------------------------------------------------------------------------------------------------------------------------ SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 1 none none none 1 N/A SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 2 none none none 1 N/A SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 3 none none none 1 N/A SHORT-GRB 1 ACS/WFC ACCUM WFC F606W 4 none none none 1 N/A 14357( 5) - 24-Jun-2016 20:58:53 - [ 8] Visit: 05 (VISIT2) Visit Requirements: SCHED 100%; AFTER 02 BY 4 D TO 6 D; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: GRB 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 SHORT-GRB WFC3/IR MULTIAC IR F125W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 1 CUM (2411.751 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 | ------------------------------------------------------------------------------------------------------------------------------------ SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F125W 4 none none none 1 N/A CUM 14357( 5) - 24-Jun-2016 20:58:53 - [ 9] Visit: 06 (VISIT2) Visit Requirements: SCHED 100%; AFTER 03 BY 4 D TO 6 D; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: GRB 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 SHORT-GRB WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 1 CUM (2411.751 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 | ------------------------------------------------------------------------------------------------------------------------------------ SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SHORT-GRB 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM 14357( 5) - 24-Jun-2016 20:58:53 - [ 10] Summary Form for Proposal 14357 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 4 D TO 6 D, AFTER 02 BY 4 D TO 6 D, AFTER 03 BY 4 D TO 6 D, ON HOLD , PATTERN 1 1, PATTERN 2 1, SCHED 100%, TOO RESPONSE TIME 3.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F160W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SHORT-GRB ------------------------------------------------------------------------------------------------------------------------------------