13117( 15) - 16-Apr-2014 12:04:18 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13117 Version: 15 Check-in Time: 16-Apr-2014 12:04:18 STScI Edit Number: 0 Title A Chandra/HST survey of dark gamma-ray bursts and their hosts ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Andrew J. Levan The University of Warwick Y CoI: Prof. Nial R. Tanvir University of Leicester N CoI: Prof. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Dr. Paul T. O'Brien University of Leicester N CoI: Ms. Rachel Tunnicliffe The University of Warwick N CoI: Dr. Klaas Wiersema University of Leicester N CoI: Dr. Daniele Malesani University of Copenhagen, Niels Bohr N Institute CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract Dark gamma-ray bursts (GRBs) -- where the optical emission is apparently suppressed -- can only be reliably localized by their X-ray afterglows. Here we propose to continue a survey using the sensitivity and point spread function of Chandra to precisely pinpoint the GRB locations, and HST to locate and study the host galaxies. Our results to date are suggestive of most dark GRBs originating in more luminous galaxies than "bright" GRBs. Our new observations will increase the statistical certainty of this result, while simultaneously allowing us to more precisely identify the minority of dark GRBs which most likely originate from the highest redshifts. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to obtain optical and IR observations of a sample of the host galaxies of dark gamma-ray bursts, where the optical light was suppressed relative to the X-ray afterglow. Formally we require that the X-ray to optical spectral slope (beta_OX) be less than 0.5. Depending on information available from the ground we will use either a one or two orbit observation per host. For brighter galaxies we will use a 3-point dither in each of WFC3 UVIS(F606W) and IR(F160W) channels, split over a single orbit. For fainter targets we will use one orbit in each of F606W and F160W with a four point dither patten executed in each orbit. At present we do not know the locations of the bursts as they will become available during the coming ~year. We will remove the on-hold status and implement the final targets as they become available. Real Time Justification ----------------------- 13117( 15) - 16-Apr-2014 12:04:18 - [ 2] Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13117( 15) - 16-Apr-2014 12:04:18 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB130803A GALAXY, HIGH REDSHIFT RA=14H41M0.6500S, J2000 V = 25 +/- 3 GALAXY, STAR FORMING DEC=-02D29'31.20" REGION, STARBURST Reference Frame: Other: XRT postion ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB130502B GALAXY, HIGH REDSHIFT RA=04H27M2.8900S, J2000 V = 25 +/- 3 GALAXY, STAR FORMING DEC=+71D03'38.30" REGION, STARBURST Reference Frame: Other: XRT Postion ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB130131A GALAXY, HIGH REDSHIFT RA=11H24M30.3800S, J2000 V = 25 +/- 3 GALAXY, STAR FORMING DEC=+48D04'33.50" REGION, STARBURST Reference Frame: Other: XRT Postion ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB130427A GALAXY, HIGH REDSHIFT RA=11H32M32.8400S, J2000 V = 25 +/- 3 GALAXY, STAR FORMING DEC=+27D41'56.20" REGION, STARBURST Reference Frame: Other: XRT Postion ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB131229A UNIDENTIFIED, X-RAY RA=05H40M55.6200S +/- 1", J2000 V = 25 +/- 1 EMITTER DEC=-04D23'46.80" Reference Frame: Other: Chandra ------------------------------------------------------------------------------------------------------------------------------------ 13117( 15) - 16-Apr-2014 12:04:18 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 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: 6 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BLOB WFC3-IR-DITHER-LINE Pattern_Purpose DITHER DITHER Number_Of_Points 2 2 Point_Spacing 5.183 0.636 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 41.859 41.788 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 7 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: 8 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 ------------------------------------------------------------------------------------------------------------------------------------ 13117( 15) - 16-Apr-2014 12:04:18 - [ 5] Visit: 01 Visit Requirements: ORIENT 120D TO 125 D; ORIENT 30D TO 35 D; ORIENT 210D TO 215 D; ORIENT 300D TO 305 D; ON HOLD On Hold Comments: Awaiting GRB positio 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 GRB130803A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF PATTERN 7 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB130803A WFC3/UVI ACCUM UVIS F606W 1 375 S POS TARG -61, -77; S (1125 S) PATTERN 8 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB130803A 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GRB130803A 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GRB130803A 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GRB130803A 2 WFC3/UVI ACCUM UVIS F606W 1 none none none 1 N/A S GRB130803A 2 WFC3/UVI ACCUM UVIS F606W 2 none none none 1 N/A S GRB130803A 2 WFC3/UVI ACCUM UVIS F606W 3 none none none 1 N/A S 13117( 15) - 16-Apr-2014 12:04:18 - [ 6] Visit: 02 Visit Requirements: SCHED 100%; ORIENT 322D TO 330 D; ORIENT 232D TO 240 D; ORIENT 142D TO 146 D; ORIENT 52D TO 60 D; ON HOLD On Hold Comments: Awaiting GRB position 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 GRB130502B WFC3/IR MULTIAC IR F160W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF PATTERN 6 1 CUM (2411.751 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB130502B WFC3/UVI ACCUM UVIS F606W 1 600 S POS TARG -61, -77; S (2400 S) PATTERN 5 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB130502B 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM GRB130502B 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM GRB130502B 1 WFC3/IR MULTIAC IR F160W 2 1 none none 1 N/A CUM GRB130502B 1 WFC3/IR MULTIAC IR F160W 2 2 none none 1 N/A CUM GRB130502B 2 WFC3/UVI ACCUM UVIS F606W 1 none none none 2 N/A S GRB130502B 2 WFC3/UVI ACCUM UVIS F606W 2 none none none 2 N/A S GRB130502B 2 WFC3/UVI ACCUM UVIS F606W 3 none none none 2 N/A S GRB130502B 2 WFC3/UVI ACCUM UVIS F606W 4 none none none 2 N/A S 13117( 15) - 16-Apr-2014 12:04:18 - [ 7] Visit: 04 Visit Requirements: SCHED 100%; ORIENT 95D TO 105 D; BETWEEN 01-MAY-2014:00:00:00 AND 31-MAY-2014:00:00:00 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 GRB130427A WFC3/IR MULTIAC IR-FIX F160W NSAMP=13, SAMP-SEQ=SPARS50 1 DEF POS TARG 40, 30; PATTERN CUM (2411.751 6 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB130427A WFC3/IR MULTIAC IR-FIX F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF POS TARG 40, 30; PATTERN CUM (1208.808 7 2 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB130427A WFC3/UVI ACCUM UVIS1 F606W 1 350 S POS TARG 40, 30; PATTERN S (1050 S) 8 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB130427A WFC3/UVI ACCUM UVIS1 F606W 1 500 S POS TARG 40, 30; PATTERN S see below 5 4 (2396 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB130427A 1 WFC3/IR MULTIAC IR-FIX F160W 1 1 none none 1 N/A CUM GRB130427A 1 WFC3/IR MULTIAC IR-FIX F160W 1 2 none none 1 N/A CUM GRB130427A 1 WFC3/IR MULTIAC IR-FIX F160W 2 1 none none 1 N/A CUM GRB130427A 1 WFC3/IR MULTIAC IR-FIX F160W 2 2 none none 1 N/A CUM GRB130427A 2 WFC3/IR MULTIAC IR-FIX F160W 1 none none none 2 N/A CUM GRB130427A 2 WFC3/IR MULTIAC IR-FIX F160W 2 none none none 2 N/A CUM GRB130427A 2 WFC3/IR MULTIAC IR-FIX F160W 3 none none none 2 N/A CUM GRB130427A 3 WFC3/UVI ACCUM UVIS1 F606W 1 none none none 2 N/A S GRB130427A 3 WFC3/UVI ACCUM UVIS1 F606W 2 none none none 2 N/A S GRB130427A 3 WFC3/UVI ACCUM UVIS1 F606W 3 none none none 2 N/A S 13117( 15) - 16-Apr-2014 12:04:18 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB130427A 4 WFC3/UVI ACCUM UVIS1 F606W 1 none none none 3 599.0 S S GRB130427A 4 WFC3/UVI ACCUM UVIS1 F606W 2 none none none 3 599.0 S S GRB130427A 4 WFC3/UVI ACCUM UVIS1 F606W 3 none none none 3 599.0 S S GRB130427A 4 WFC3/UVI ACCUM UVIS1 F606W 4 none none none 3 599.0 S S 13117( 15) - 16-Apr-2014 12:04:18 - [ 9] Visit: 05 Visit Requirements: SCHED 100%; ORIENT 317D TO 330 D; ON HOLD On Hold Comments: Awaiting GRB positio 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 GRB130131A WFC3/IR MULTIAC IR F160W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF PATTERN 7 1 CUM (1058.806 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB130131A WFC3/UVI ACCUM UVIS F606W 1 360 S POS TARG 61, -77; S see below PATTERN 8 2 (1101 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB130131A 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GRB130131A 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GRB130131A 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GRB130131A 2 WFC3/UVI ACCUM UVIS F606W 1 none none none 1 367.0 S S GRB130131A 2 WFC3/UVI ACCUM UVIS F606W 2 none none none 1 367.0 S S GRB130131A 2 WFC3/UVI ACCUM UVIS F606W 3 none none none 1 367.0 S S 13117( 15) - 16-Apr-2014 12:04:18 - [ 10] Visit: 06 Visit Requirements: ON HOLD On Hold Comments: Awaiting GRB positio 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 GRB131229A WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF PATTERN 7 1 CUM (1208.808 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB131229A WFC3/UVI ACCUM UVIS F606W 1 375 S POS TARG -61, -77; S (1125 S) PATTERN 8 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB131229A 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM GRB131229A 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM GRB131229A 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM GRB131229A 2 WFC3/UVI ACCUM UVIS F606W 1 none none none 1 N/A S GRB131229A 2 WFC3/UVI ACCUM UVIS F606W 2 none none none 1 N/A S GRB131229A 2 WFC3/UVI ACCUM UVIS F606W 3 none none none 1 N/A S 13117( 15) - 16-Apr-2014 12:04:18 - [ 11] Summary Form for Proposal 13117 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, IR-FIX, UVIS, UVIS1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, NSAMP=8, NSAMP=9, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-MAY-2014:00:00:00 AND 31-MAY-2014:00:00:00, ON HOLD , ORIENT 120D TO 125 D, ORIENT 142D TO 146 D, ORIENT 210D TO 215 D, ORIENT 232D TO 240 D, ORIENT 300D TO 305 D, ORIENT 30D TO 35 D, ORIENT 317D TO 330 D, ORIENT 322D TO 330 D, ORIENT 52D TO 60 D, ORIENT 95D TO 105 D, PATTERN 5 2, PATTERN 5 4, PATTERN 6 1, PATTERN 7 1, PATTERN 7 2, PATTERN 8 2, PATTERN 8 3, POS TARG -61, -77, POS TARG 40, 30, POS TARG 61, -77, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB130131A, GRB130427A, GRB130502B, GRB130803A, GRB131229A ------------------------------------------------------------------------------------------------------------------------------------