13831( 2) - 23-Jul-2014 14:29:38 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13831 Version: 2 Check-in Time: 23-Jul-2014 14:29:38 STScI Edit Number: 0 Title GRB hosts and the search for missing star formation at high redshift ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Nial R. Tanvir University of Leicester Y CoI: Dr. Michele Trenti University of Cambridge N CoI: Prof. Andrew J. Levan The University of Warwick N CoI: Prof. J. Michael Shull University of Colorado at Boulder N CoI: Prof. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Prof. Richard S. Ellis California Institute of Technology N CoI: Prof. Johan P. U. Fynbo University of Copenhagen, Niels Bohr N Institute CoI: Dr. Emily Levesque University of Colorado at Boulder N CoI: Dr. James Rhoads Arizona State University N CoI: Dr. Rosalba Perna State University of New York at Stony N Brook CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N CoI: Prof. Brant Robertson University of Arizona N CoI: Prof. John T. Stocke University of Colorado at Boulder N CoI: Prof. Malcolm Bremer University of Bristol N CoI: Dr. Elizabeth R. Stanway The University of Warwick N CoI: Dr. Daniel Perley California Institute of Technology N ------------------------------------------------------------------------------------ Abstract Measuring the star formation rate (SFR) at high redshift is crucial for understanding cosmic reionization and the formation of galaxies at early times. Two common, complementary approaches are Lyman-Break-Galaxy (LBG) surveys, providing large samples, and Gamma-Ray-Bursts (GRBs) which can sign-post star formation even in the smallest galaxies. Recent results of both methods have found evidence for a dominant population of very faint star-forming galaxies at z>5, representing a continuation of the steepening of the galaxy luminosity function with redshift. However, LBG surveys are affected by possible incompleteness and contamination, while the magnitude limit means very large correction factors must be applied to account for these unseen galaxies. On the other hand GRBs suffer small number statistics and have their own selection biases. We propose to construct a new sample of six 6~6 GRBs. We will utilize the F140W filter exclusively for its depth, and will obtain observations of 5 targets with exposure times of 5 orbits (050904), 4 orbits (120521C, 130606A, 140515A) and 3 orbits (080913, with a shorter exposure time due to pre-existing data). We will utilize a 3-point dither pattern within each orbit, with the dither_blob pattern executed as pos-targs between each orbit to step over the IR blobs. We also introduce an additional 3.5 pixel shift in the x-axis such that in a 4 orbit observation we essentially obtain an optimal 6 point dither pattern at each of the dither_blob positions (i.e. 12 points in total). For the 5 orbit visit we repeat the first base position of the pattern, and for the 3 orbit visit we do not include the fourth position, but will still obtain a 9-point dither. We utilize the STEP read sequence within each orbit in order to obtain dynamic range to map ground based observations to the same co-ordinate system as the HST imaging. For GRB 120521C, GRB 080913 and GRB 050904 we have also introduced some roll angle constraints to avoid the risks of contamination from diffraction spikes of bright stars. ------------------------------------------------------------------------------------ 13831( 2) - 23-Jul-2014 14:29:38 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB-120521C GALAXY, HIGH REDSHIFT RA=14H17M8.8000S +/- 0.1", J2000 H(AB)~29 GALAXY DEC=+42D08'41.00" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB-050904 GALAXY, HIGH REDSHIFT RA=00H54M50.9000S +/- 0.1", J2000 H(AB)~29 GALAXY DEC=+14D05'12.00" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB-080913 GALAXY, HIGH REDSHIFT RA=04H22M54.7000S +/- 0.1", J2000 H(AB)~29 GALAXY DEC=-25D07'46.00" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB-140515A GALAXY, HIGH REDSHIFT RA=12H24M15.4500S +/- 0.1", J2000 H(AB)~29 GALAXY DEC=+15D06'17.00" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB-130606A GALAXY, HIGH REDSHIFT RA=16H37M35.2000S, J2000 H(AB)~29 GALAXY DEC=+29D47'47.00" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13831( 2) - 23-Jul-2014 14:29:38 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 6 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 ------------------------------------------------------------------------------------------------------------------------------------ 13831( 2) - 23-Jul-2014 14:29:38 - [ 5] Visit: 01 Visit Requirements: ORIENT 145D TO 215 D; ORIENT 235D TO 305 D; ORIENT 325D TO 35 D; ORIENT 55D TO 125 D 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 GRB-120521C WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -1.930, -1.729; CUM (2697.7 S) PATTERN 6 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB-120521C WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.930, 1.729; CUM (2697.7 S) PATTERN 6 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB-120521C WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -2.404, -1.729; CUM (2697.7 S) PATTERN 6 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB-120521C WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.456, 1.729; CUM (2697.7 S) PATTERN 6 4 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB-120521C 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB-120521C 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB-120521C 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB-120521C 2 WFC3/IR MULTIAC IR F140W 1 none none none 2 N/A CUM GRB-120521C 2 WFC3/IR MULTIAC IR F140W 2 none none none 2 N/A CUM GRB-120521C 2 WFC3/IR MULTIAC IR F140W 3 none none none 2 N/A CUM GRB-120521C 3 WFC3/IR MULTIAC IR F140W 1 none none none 3 N/A CUM GRB-120521C 3 WFC3/IR MULTIAC IR F140W 2 none none none 3 N/A CUM GRB-120521C 3 WFC3/IR MULTIAC IR F140W 3 none none none 3 N/A CUM GRB-120521C 4 WFC3/IR MULTIAC IR F140W 1 none none none 4 N/A CUM GRB-120521C 4 WFC3/IR MULTIAC IR F140W 2 none none none 4 N/A CUM GRB-120521C 4 WFC3/IR MULTIAC IR F140W 3 none none none 4 N/A CUM 13831( 2) - 23-Jul-2014 14:29:38 - [ 6] Visit: 02 Visit Requirements: 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 GRB-140515A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -1.930, -1.729; CUM (2697.7 S) PATTERN 6 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB-140515A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.930, 1.729; CUM (2697.7 S) PATTERN 6 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB-140515A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -2.404, -1.729; CUM (2697.7 S) PATTERN 6 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB-140515A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.456, 1.729; CUM (2697.7 S) PATTERN 6 4 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB-140515A 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB-140515A 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB-140515A 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB-140515A 2 WFC3/IR MULTIAC IR F140W 1 none none none 2 N/A CUM GRB-140515A 2 WFC3/IR MULTIAC IR F140W 2 none none none 2 N/A CUM GRB-140515A 2 WFC3/IR MULTIAC IR F140W 3 none none none 2 N/A CUM GRB-140515A 3 WFC3/IR MULTIAC IR F140W 1 none none none 3 N/A CUM GRB-140515A 3 WFC3/IR MULTIAC IR F140W 2 none none none 3 N/A CUM GRB-140515A 3 WFC3/IR MULTIAC IR F140W 3 none none none 3 N/A CUM GRB-140515A 4 WFC3/IR MULTIAC IR F140W 1 none none none 4 N/A CUM GRB-140515A 4 WFC3/IR MULTIAC IR F140W 2 none none none 4 N/A CUM GRB-140515A 4 WFC3/IR MULTIAC IR F140W 3 none none none 4 N/A CUM 13831( 2) - 23-Jul-2014 14:29:38 - [ 7] Visit: 03 Visit Requirements: 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 GRB-130606A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -1.930, -1.729; CUM (2697.7 S) PATTERN 6 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB-130606A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.930, 1.729; CUM (2697.7 S) PATTERN 6 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB-130606A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -2.404, -1.729; CUM (2697.7 S) PATTERN 6 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB-130606A WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.456, 1.729; CUM (2697.7 S) PATTERN 6 4 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB-130606A 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB-130606A 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB-130606A 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB-130606A 2 WFC3/IR MULTIAC IR F140W 1 none none none 2 N/A CUM GRB-130606A 2 WFC3/IR MULTIAC IR F140W 2 none none none 2 N/A CUM GRB-130606A 2 WFC3/IR MULTIAC IR F140W 3 none none none 2 N/A CUM GRB-130606A 3 WFC3/IR MULTIAC IR F140W 1 none none none 3 N/A CUM GRB-130606A 3 WFC3/IR MULTIAC IR F140W 2 none none none 3 N/A CUM GRB-130606A 3 WFC3/IR MULTIAC IR F140W 3 none none none 3 N/A CUM GRB-130606A 4 WFC3/IR MULTIAC IR F140W 1 none none none 4 N/A CUM GRB-130606A 4 WFC3/IR MULTIAC IR F140W 2 none none none 4 N/A CUM GRB-130606A 4 WFC3/IR MULTIAC IR F140W 3 none none none 4 N/A CUM 13831( 2) - 23-Jul-2014 14:29:38 - [ 8] Visit: 04 Visit Requirements: ORIENT 70D TO 120 D; ORIENT 160D TO 210 D; ORIENT 250D TO 300 D; ORIENT 340D TO 30 D 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 GRB-050904 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -1.930, -1.729; CUM (2697.7 S) PATTERN 6 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB-050904 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.930, 1.729; CUM (2697.7 S) PATTERN 6 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB-050904 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -2.404, -1.729; CUM (2697.7 S) PATTERN 6 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRB-050904 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.456, 1.729; CUM (2697.7 S) PATTERN 6 4 ------------------------------------------------------------------------------------------------------------------------------------ 5 GRB-050904 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.456, 1.729; CUM (2697.7 S) PATTERN 6 5 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB-050904 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB-050904 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB-050904 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB-050904 2 WFC3/IR MULTIAC IR F140W 1 none none none 2 N/A CUM GRB-050904 2 WFC3/IR MULTIAC IR F140W 2 none none none 2 N/A CUM GRB-050904 2 WFC3/IR MULTIAC IR F140W 3 none none none 2 N/A CUM GRB-050904 3 WFC3/IR MULTIAC IR F140W 1 none none none 3 N/A CUM GRB-050904 3 WFC3/IR MULTIAC IR F140W 2 none none none 3 N/A CUM GRB-050904 3 WFC3/IR MULTIAC IR F140W 3 none none none 3 N/A CUM GRB-050904 4 WFC3/IR MULTIAC IR F140W 1 none none none 4 N/A CUM 13831( 2) - 23-Jul-2014 14:29:38 - [ 9] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB-050904 4 WFC3/IR MULTIAC IR F140W 2 none none none 4 N/A CUM GRB-050904 4 WFC3/IR MULTIAC IR F140W 3 none none none 4 N/A CUM GRB-050904 5 WFC3/IR MULTIAC IR F140W 1 none none none 5 N/A CUM GRB-050904 5 WFC3/IR MULTIAC IR F140W 2 none none none 5 N/A CUM GRB-050904 5 WFC3/IR MULTIAC IR F140W 3 none none none 5 N/A CUM 13831( 2) - 23-Jul-2014 14:29:38 - [ 10] Visit: 05 Visit Requirements: ORIENT 72.4D TO 81.3 D; ORIENT 162.4D TO 171.3 D; ORIENT 252.4D TO 261.3 D; ORIENT 342.4D TO 351.3 D 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 GRB-080913 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -1.930, -1.729; CUM (2697.7 S) PATTERN 6 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB-080913 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG 1.930, 1.729; CUM (2697.7 S) PATTERN 6 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB-080913 WFC3/IR MULTIAC IR F140W NSAMP=15, SAMP-SEQ=STEP100 1 DEF POS TARG -2.404, -1.729; CUM (2697.7 S) PATTERN 6 3 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB-080913 1 WFC3/IR MULTIAC IR F140W 1 none none none 1 N/A CUM GRB-080913 1 WFC3/IR MULTIAC IR F140W 2 none none none 1 N/A CUM GRB-080913 1 WFC3/IR MULTIAC IR F140W 3 none none none 1 N/A CUM GRB-080913 2 WFC3/IR MULTIAC IR F140W 1 none none none 2 N/A CUM GRB-080913 2 WFC3/IR MULTIAC IR F140W 2 none none none 2 N/A CUM GRB-080913 2 WFC3/IR MULTIAC IR F140W 3 none none none 2 N/A CUM GRB-080913 3 WFC3/IR MULTIAC IR F140W 1 none none none 3 N/A CUM GRB-080913 3 WFC3/IR MULTIAC IR F140W 2 none none none 3 N/A CUM GRB-080913 3 WFC3/IR MULTIAC IR F140W 3 none none none 3 N/A CUM 13831( 2) - 23-Jul-2014 14:29:38 - [ 11] Summary Form for Proposal 13831 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=15, SAMP-SEQ=STEP100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 145D TO 215 D, ORIENT 160D TO 210 D, ORIENT 162.4D TO 171.3 D, ORIENT 235D TO 305 D, ORIENT 250D TO 300 D, ORIENT 252.4D TO 261.3 D, ORIENT 325D TO 35 D, ORIENT 340D TO 30 D, ORIENT 342.4D TO 351.3 D, ORIENT 55D TO 125 D, ORIENT 70D TO 120 D, ORIENT 72.4D TO 81.3 D, PATTERN 6 1, PATTERN 6 2, PATTERN 6 3, PATTERN 6 4, PATTERN 6 5, POS TARG -1.930, -1.729, POS TARG -2.404, -1.729, POS TARG 1.456, 1.729, POS TARG 1.930, 1.729 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F140W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB-050904, GRB-080913, GRB-120521C, GRB-130606A, GRB-140515A ------------------------------------------------------------------------------------------------------------------------------------