10780( 7) - 06/30/06 10:40 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10780 Version: 7 Check-in Time: 30-Jun-2006 14:40:26 STScI Edit Number: Title The Unusual Afterglow and Host Galaxy of the Short GRB 060121 ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO/DD 14 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Andrew Fruchter Space Telescope Science Institute CoI: Dr. Andrew J. Levan University of Hertfordshire N CoI: Dr. David Bersier Liverpool John Moores University N CoI: Dr. Alberto J. Castro-Tirado Instituto de Astrofisica de Andalucia N (IAA) CoI: Dr. Johan Uldall Fynbo University of Copenhagen, Niels Bohr N Institute CoI: Dr. Javier Gorosabel INTA, Lab. de Astrofisica Espacial y N Fisica Fundamental CoI: Mr. John Graham The Johns Hopkins University N CoI: Dr. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Dr. Nial R. Tanvir University of Hertfordshire N ------------------------------------------------------------------------------------ Abstract We request Director's Discretionary Time to observe the afterglow and host galaxy of the short-hard gamma-ray bursts GRB 060121. This is only the fourth time an optical afterglow of a short-hard burst has been found at its properties are significantly different to other cases. Both the afterglow and host galaxy are much fainter than previous short bursts (for which optical afterglows have been located) and the afterglow may also show the signature of dust extinction. Such extinction is completely unexpected for short bursts, given the currently popular model of their origin in NS-NS mergers. We propose ACS and NICMOS observations which will locate the afterglow and host galaxy of GRB 060121, provide constraints on its beaming angle, search for the signature of dust, and measure the offset from its host. These observations offer a strong test of NS-NS merger models. ------------------------------------------------------------------------------------ 10780( 7) - 06/30/06 10:40 - [ 2] Observations Description ------------------------ TBD Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10780( 7) - 06/30/06 10:40 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB060121 EXT-STAR, GAMMA RAY RA=09H09M52.1300S +/- 0.1", J2000 V = 27.0+/-1.0 BURSTER DEC=+45D39'44.90" +/- 0.1" Coordinate Source: GUIDE_STAR_CATALOG 2 GRB060121- EXT-STAR, GAMMA RAY RA=09H09M51.9900S +/- 0.1", J2000 V = 27.0+/-1.0 OPT BURSTER DEC=+45D39'45.60" +/- 0.1" Coordinate Source: GUIDE_STAR_CATALOG 10780( 7) - 06/30/06 10:40 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE ACS-WFC-DITHER-BOX Pattern_Purpose DITHER DITHER Number_Of_Points 2 4 Point_Spacing 3.011 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 85.28 20.67 Angle_Between_Sides 69.05 Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ 10780( 7) - 06/30/06 10:40 - [ 5] Visit: 01 Visit Priority: Visit Requirements: BETWEEN 27-FEB-2006:00:00:00 AND 13-MAR-2006:00:00:00; VISIBILITY INTERVAL 3060 S 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB060121 NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG -1.426,-1.421 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB060121 NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG -1.426, 1.523 CUM ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB060121 NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG 1.528,-1.421 CUM ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB060121 NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG 1.528, 1.523 CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB060121 1 NIC3 MULTIAC NIC3 F160W none none none none 1 N/A CUM GRB060121 2 NIC3 MULTIAC NIC3 F160W none none none none 1 N/A CUM GRB060121 3 NIC3 MULTIAC NIC3 F160W none none none none 2 N/A CUM GRB060121 4 NIC3 MULTIAC NIC3 F160W none none none none 2 N/A CUM 10780( 7) - 06/30/06 10:40 - [ 6] Visit: 02 Visit Priority: Visit Requirements: BETWEEN 27-FEB-2006:00:00:00 AND 13-MAR-2006:00:00:00 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB060121 ACS/WFC ACCUM WFC1 F606W CR-SPLIT=NO 1 550 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB060121 1 ACS/WFC ACCUM WFC1 F606W 1 1 none none 1 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 1 2 none none 1 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 1 3 none none 1 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 1 4 none none 1 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 2 1 none none 2 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 2 2 none none 2 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 2 3 none none 2 N/A GRB060121 1 ACS/WFC ACCUM WFC1 F606W 2 4 none none 2 N/A 10780( 7) - 06/30/06 10:40 - [ 7] Visit: 03 Visit Priority: Visit Requirements: VISIBILITY INTERVAL 3060 S 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB060121-O NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG -1.426,-1.421 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB060121-O NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG -1.426, 1.523 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB060121-O NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG 1.528,-1.421 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB060121-O NIC3 MULTIAC NIC3 F160W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG 1.528, 1.523 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB060121-OPT 1 NIC3 MULTIAC NIC3 F160W none none none none 1 N/A CUM GRB060121-OPT 2 NIC3 MULTIAC NIC3 F160W none none none none 1 N/A CUM GRB060121-OPT 3 NIC3 MULTIAC NIC3 F160W none none none none 2 N/A CUM GRB060121-OPT 4 NIC3 MULTIAC NIC3 F160W none none none none 2 N/A CUM 10780( 7) - 06/30/06 10:40 - [ 8] Visit: 04 Visit Priority: Visit Requirements: VISIBILITY INTERVAL 3060 S 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB060121-O NIC3 MULTIAC NIC3 F110W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG -1.426,-1.421 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB060121-O NIC3 MULTIAC NIC3 F110W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG -1.426, 1.523 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB060121-O NIC3 MULTIAC NIC3 F110W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG 1.528,-1.421 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB060121-O NIC3 MULTIAC NIC3 F110W NSAMP=11,SAMP-SEQ=SPARS128 1 DEF POS TARG 1.528, 1.523 PT CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB060121-OPT 1 NIC3 MULTIAC NIC3 F110W none none none none 1 N/A CUM GRB060121-OPT 2 NIC3 MULTIAC NIC3 F110W none none none none 1 N/A CUM GRB060121-OPT 3 NIC3 MULTIAC NIC3 F110W none none none none 2 N/A CUM GRB060121-OPT 4 NIC3 MULTIAC NIC3 F110W none none none none 2 N/A CUM 10780( 7) - 06/30/06 10:40 - [ 9] Summary Form for Proposal 10780 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures NIC3 WFC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations NIC3 ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=11 SAMP-SEQ=SPARS128 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 27-FEB-2006 00 00 00 AND 13-MAR-2006 00 00 00; VISIBILITY INTERVAL 3060 S; POS TARG -1.426,-1.421; POS TARG -1.426, 1.523; POS TARG 1.528,-1.421; POS TARG 1.528, 1.523; BETWEEN 27-FEB-2006 00 00 00 AND 13-MAR-2006 00 00 00; PATTERN 1 1; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W F606W F110W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB060121 GRB060121-OPT ------------------------------------------------------------------------------------------------------------------------------------