11991( 2) - 16-Jan-2009 13:45:34 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11991 Version: 2 Check-in Time: 16-Jan-2009 13:45:34 STScI Edit Number: 0 Title Constraining the late time lightcurve and energy of GRB 090102 ------------------------------------------------------------------------------------ Type Cycle GO/DD 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Andrew J. Levan The University of Warwick CoI: Dr. Daniele Malesani University of Copenhagen, Niels Bohr N Institute CoI: Dr. Nial R. Tanvir University of Leicester N CoI: Dr. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Dr. Johan P. U. Fynbo University of Copenhagen, Niels Bohr N Institute CoI: Dr. Klaas Wiersema University of Leicester N CoI: Dr. Peter Curran University College London N CoI: Dr. Antonio de Ugarte Postigo European Southern Observatory - Chile N CoI: Dr. Evert Rol University of Leicester N CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract We propose to conduct a series of late time observations of the lightcurve of the bright gamma-ray burst GRB 090102. Declared a burst of interest by the Swift team, and with excellent broadband data covering the prompt emission (Swift and Fermi) and afterglow (Swift, TAROT, NOT, WHT, and several more), GRB 090102 offers a rare opportunity to probe the physics and energetics of GRBs. Its high energy budget (>2e53 ergs for isotropic emission) stretches plausible progenitor models, and as yet the signatures of jet-like emission have not been observed. Our late time observations will search for steepening of the afterglow due to lateral expansion of the jet. This will enable us, in tandem with the data already secured, to determine its total energy budget, and compare this to expectations for different progenitors models. HST is vital to this endeavour since it can reach depths essentially unattainable to ground based technology, while its invariant PSF will allow us to accurately remove underlying host contamination. Ultimately, the range and quality of data secured for this burst will enable us to accurately reconstruct the parameters of the explosion, and shed greater light on the physical processes which underly the production of GRBs. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to observe GRB 090102 at 3 epochs using WFPC2 (and ACS/WFC3 if the final epoch takes place after SM4). We will perform 3 orbit observations at each epoch utlizing the F606W filter. Our first observations should take place in the current visiblity window, which expires on the 27 Jan (this is visit1). A second set of observations (identical to the first) should take place in a second window at the end of Feb (visit 2). The final observations will aim to constrain the host galaxy contribution and can take place at a later date (in 11991( 2) - 16-Jan-2009 13:45:34 - [ 2] 2-gyro mode visiblity is open again at the end of Sept 09, but this will obviously be different in 3-gyro mode post SM4). Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11991( 2) - 16-Jan-2009 13:45:34 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB090102 GALAXY, HIGH REDSHIFT RA=08H32M58.5200S +/- 0.3", J2000 V = 25 +/- 2 GALAXY DEC=+33D06'51.30" +/- 0.3" Reference Frame: Other: Swift Comments: ------------------------------------------------------------------------------------------------------------------------------------ 11991( 2) - 16-Jan-2009 13:45:34 - [ 4] Visit: 01 Visit Requirements: BEFORE 27-JAN-2009:23:59:00 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 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 20 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1000 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1000 S POS TARG 0, 0.249 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.232, 0.232 ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.232, 0.481 ------------------------------------------------------------------------------------------------------------------------------------ 6 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.464, 0.464 ------------------------------------------------------------------------------------------------------------------------------------ 7 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.464, 0.713 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB090102 1 WFPC2 IMAGE WFALL-FI F606W none none none none 1 N/A X GRB090102 2 WFPC2 IMAGE WFALL-FI F606W none none none none 1 N/A X GRB090102 3 WFPC2 IMAGE WFALL-FI F606W none none none none 1 N/A X GRB090102 4 WFPC2 IMAGE WFALL-FI F606W none none none none 2 N/A X GRB090102 5 WFPC2 IMAGE WFALL-FI F606W none none none none 2 N/A X GRB090102 6 WFPC2 IMAGE WFALL-FI F606W none none none none 3 N/A X GRB090102 7 WFPC2 IMAGE WFALL-FI F606W none none none none 3 N/A X 11991( 2) - 16-Jan-2009 13:45:34 - [ 5] Visit: 02 Visit Requirements: BETWEEN 21-FEB-2009:01:00:00 AND 28-FEB-2009:09:06:15 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 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0, 0.249 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.232, 0.232 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.232, 0.481 ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG .464, 0.464 ------------------------------------------------------------------------------------------------------------------------------------ 6 GRB090102 WFPC2 IMAGE WFALL-FIX F606W CR-SPLIT=NO 1 1100 S POS TARG 0.464, 0.713 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB090102 1 WFPC2 IMAGE WFALL-FI F606W none none none none 1 N/A X GRB090102 2 WFPC2 IMAGE WFALL-FI F606W none none none none 1 N/A X GRB090102 3 WFPC2 IMAGE WFALL-FI F606W none none none none 2 N/A X GRB090102 4 WFPC2 IMAGE WFALL-FI F606W none none none none 2 N/A X GRB090102 5 WFPC2 IMAGE WFALL-FI F606W none none none none 3 N/A X GRB090102 6 WFPC2 IMAGE WFALL-FI F606W none none none none 3 N/A X 11991( 2) - 16-Jan-2009 13:45:34 - [ 6] Summary Form for Proposal 11991 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFALL-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 27-JAN-2009:23:59:00, BETWEEN 21-FEB-2009:01:00:00 AND 28-FEB-2009:09:06:15, POS TARG .464, 0.464, POS TARG 0, 0, POS TARG 0, 0.249, POS TARG 0.232, 0.232, POS TARG 0.232, 0.481, POS TARG 0.464, 0.464, POS TARG 0.464, 0.713 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB090102 ------------------------------------------------------------------------------------------------------------------------------------