12786( 4) - 28-Dec-2011 03:57:00 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12786 Version: 4 Check-in Time: 28-Dec-2011 03:57:00 STScI Edit Number: 1 Title Searching for the nature of the ultra-long transient GRB 111209A ------------------------------------------------------------------------------------ Type Cycle GO/DD 19 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Andrew J. Levan The University of Warwick CoI: Prof. Nial R. Tanvir University of Leicester N CoI: Dr. Johan P. U. Fynbo University of Copenhagen, Niels Bohr N Institute CoI: Prof. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N CoI: Dr. Stephen Bradley Cenko University of California - Berkeley N CoI: Dr. David Bersier Liverpool John Moores University N ------------------------------------------------------------------------------------ Abstract We propose observations of the exceptional long duration transient GRB 111209A. Its long-lived gamma- and X-ray emission mark it apart from other GRBs, and are very similar to those of the Christmas day burst 2010, whose origin remains under debate, culminating in the publication of two competing scenarios in Nature earlier this month. Unlike the Christmas day burst, our deep VLT and Gemini spectroscopy has unveiled the redshift of GRB 111209A, and allows us to lauch a comprehensive campaign to understand its origin. Does it originate from a massive star collapse akin to long GRBs? Is it related to Galactic nuclei, as suggested for some other long lived gamma-ray transients discovered in 2011? By utilizing the exquisite HST PSF we will obtain a precise position of the afterglow with respect to its host galaxy. Coupled with this we will use the unique ability of WFC3 grism's to obtain good S/N across the 1 micron region to search at the expected peak of any supernova, and hence provide spectroscopic evidence for the presence (or absence) of an associated supernova. Ultimately these observations may show conclusively what these long duration transients are, and link them into the diverse populations of high energy transients that are now being uncovered. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to obtain observations of the exceptional GRB 111209A. Our first epoch of observations will consist of two orbits, one of imaging and a second of grism spectroscopy. Our imaging will be split between the F336W and F125W filters on WFC3. We will use a 3 point dither for each filter to pack the orbit, with the F336W observations tracking the afterglow, and F125W providing a measure of any associated supernova. Our grism observations will utilize G102 to map the expected spectral peak of the supernova. We will use a 4-point dither pattern. 12786( 4) - 28-Dec-2011 03:57:00 - [ 2] Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12786( 4) - 28-Dec-2011 03:57:00 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB111209A UNIDENTIFIED, ACCRETION RA=00H57M22.6100S +/- 1", J2000 V = 21 +/- 2 DISK, GAMMA RAY DEC=-46D48'3.60" +/- 1" EMITTER, X-RAY EMITTER Reference Frame: Other: Swift ------------------------------------------------------------------------------------------------------------------------------------ 12786( 4) - 28-Dec-2011 03:57:00 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.636 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 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 ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 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 ------------------------------------------------------------------------------------------------------------------------------------ 12786( 4) - 28-Dec-2011 03:57:00 - [ 5] Visit: 01 Visit Requirements: SCHED 100% 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 GRB111209A WFC3/UVI ACCUM UVIS F336W CR-SPLIT=NO 1 350 S PATTERN 1 1 S ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB111209A WFC3/IR MULTIAC IR F125W NSAMP=8, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB111209A 1 WFC3/UVI ACCUM UVIS F336W 1 none none none 1 N/A S GRB111209A 1 WFC3/UVI ACCUM UVIS F336W 2 none none none 1 N/A S GRB111209A 1 WFC3/UVI ACCUM UVIS F336W 3 none none none 1 N/A S GRB111209A 2 WFC3/IR MULTIAC IR F125W 1 none none none 1 N/A CUM GRB111209A 2 WFC3/IR MULTIAC IR F125W 2 none none none 1 N/A CUM GRB111209A 2 WFC3/IR MULTIAC IR F125W 3 none none none 1 N/A CUM 12786( 4) - 28-Dec-2011 03:57:00 - [ 6] Visit: 02 Visit Requirements: SCHED 100% 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 GRB111209A WFC3/IR MULTIAC GRISM1024 F125W NSAMP=4, SAMP-SEQ=SPARS50 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB111209A WFC3/IR MULTIAC GRISM1024 G102 NSAMP=12, SAMP-SEQ=SPARS50 1 DEF PATTERN 3 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB111209A 1 WFC3/IR MULTIAC GRISM102 F125W none none none none 1 N/A CUM 4 GRB111209A 2 WFC3/IR MULTIAC GRISM102 G102 1 none none none 1 N/A CUM 4 GRB111209A 2 WFC3/IR MULTIAC GRISM102 G102 2 none none none 1 N/A CUM 4 GRB111209A 2 WFC3/IR MULTIAC GRISM102 G102 3 none none none 1 N/A CUM 4 GRB111209A 2 WFC3/IR MULTIAC GRISM102 G102 4 none none none 1 N/A CUM 4 12786( 4) - 28-Dec-2011 03:57:00 - [ 7] Visit: 03 Visit Requirements: BETWEEN 07-JAN-2012 AND 14-JAN-2012 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 GRB111209A WFC3/IR MULTIAC GRISM1024 G102 NSAMP=10, SAMP-SEQ=SPARS100 1 DEF PATTERN 3 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB111209A WFC3/IR MULTIAC GRISM1024 F125W NSAMP=4, SAMP-SEQ=SPARS50 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB111209A WFC3/UVI ACCUM UVIS F336W CR-SPLIT=NO 1 350 S PATTERN 4 3 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB111209A 1 WFC3/IR MULTIAC GRISM102 G102 1 none none none 1 N/A CUM 4 GRB111209A 1 WFC3/IR MULTIAC GRISM102 G102 2 none none none 1 N/A CUM 4 GRB111209A 1 WFC3/IR MULTIAC GRISM102 G102 3 none none none 1 N/A CUM 4 GRB111209A 1 WFC3/IR MULTIAC GRISM102 G102 4 none none none 2 N/A CUM 4 GRB111209A 2 WFC3/IR MULTIAC GRISM102 F125W none none none none 2 N/A CUM 4 GRB111209A 3 WFC3/UVI ACCUM UVIS F336W 1 none none none 2 N/A S GRB111209A 3 WFC3/UVI ACCUM UVIS F336W 2 none none none 2 N/A S GRB111209A 3 WFC3/UVI ACCUM UVIS F336W 3 none none none 2 N/A S GRB111209A 3 WFC3/UVI ACCUM UVIS F336W 4 none none none 2 N/A S 12786( 4) - 28-Dec-2011 03:57:00 - [ 8] Summary Form for Proposal 12786 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures GRISM1024, IR, UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=10, NSAMP=12, NSAMP=4, NSAMP=8, SAMP-SEQ=SPARS100, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 07-JAN-2012 AND 14-JAN-2012, PATTERN 1 1, PATTERN 2 2, PATTERN 3 1, PATTERN 3 2, PATTERN 4 3, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F336W, G102 ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB111209A ------------------------------------------------------------------------------------------------------------------------------------