14804( 3) - 18-Aug-2017 14:57:26 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14804 Version: 3 Check-in Time: 18-Aug-2017 14:57:26 STScI Edit Number: 0 Title Rapid ToO observations of the first gravitational wave counterparts ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Andrew James Levan The University of Warwick Y CoI: Prof. Nial Rahil Tanvir University of Leicester N CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N CoI: Prof. Stephan Rosswog Stockholm University N CoI: Dr. Elena Pian INAF, Istituto di Fisica Spaziale e Fisica N Cosmica-Bologna CoI: Dr. Antonio de Ugarte Postigo Instituto de Astrofisica de Andalucia N (IAA) CoI: Dr. Joseph Lyman The University of Warwick N CoI: Dr. Klaas Wiersema University of Leicester N CoI: Dr. Julian P. Osborne University of Leicester N CoI: Dr. Ilya Mandel University of Birmingham N CoI: Dr. Eliana Palazzi INAF, Istituto di Fisica Spaziale e Fisica N Cosmica-Bologna CoI: Prof. Jens Hjorth University of Copenhagen, Niels Bohr N Institute CoI: Dr. Jochen Greiner Max-Planck-Institut fur extraterrestrische N Physik CoI: Dr. Zach Cano University of Iceland N CoI: Dr. Steve Schulze Pontificia Universidad Catolica de Chile N CoI: Dr. Darach Watson University of Copenhagen, Niels Bohr N Institute CoI: Dr. Daniel Perley Liverpool John Moores University N CoI: Dr. Patrick Sutton University of Wales, College of Cardiff N (UWCC) CoI: Dr. Phillip A. Evans University of Leicester N CoI: Dr. Paul Thomas O'Brien University of Leicester N ------------------------------------------------------------------------------------ Abstract We propose a series of disruptive ToO observations of the first electromagnetic counterparts to gravitational wave sources. These observations will track the likely rapidly fading counterparts to levels a factor 10 fainter than possible from the ground. They will determine the spectral and temporal evolution, evaluate their power sources, ascertain their contribution to the production of heavy elements in the Universe, pinpoint them on their host galaxies and provide information to hone further searches. In concert with already award late time (>3 week turnaround) observations these observations will provide a unique and powerful view of a newly discovered, but long awaited class of astronomical object. ------------------------------------------------------------------------------------ Observations Description ------------------------ 14804( 3) - 18-Aug-2017 14:57:26 - [ 2] This is a proposal to obtain HST observations of the first electromagnetic counterparts to gravitational wave sources. It is a disruptive ToO programme, with the first observations taking place after a few days (3-6 after trigger) and subsequent observations at ~1 week intervals. Late time observations will be obtained with a separate programme. Our programme envisages different strategies depending on the nature of the counterpart, we outline each of these below: 1) Optical/IR counterpart discovery In this case we will likely trigger IR spectroscopy to search for kilonova emission. This will be through visits G1 and G2 which call for G102 and G141 grism spectroscopy as well as short direct images in F125W and F160W. Our later observations will be imaging in F125W and F160W (visits I1 and I2) to track the lightcurve. If the source is very faint, then we may omit the grism spectroscopy and use the X visits in F140W instead. 2) X-ray only counterpart discovery Here we assume that deep optical observations at the counterpart location have failed to identify a optical counterpart. In this case we will conduct a deep imaging search with HST. This will use visits X1-X4 (1 and 2 orbit visits in F140W) in order to conduct a deep search for any kilonova emission. ------------------------------------------------------------------------------------ 14804( 3) - 18-Aug-2017 14:57:26 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB170817A GALAXY, UNDESIGNATED RA=13H09M48.0800S, J2000 V = 16 +/- 1 DEC=-23D22'53.20" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 14804( 3) - 18-Aug-2017 14:57:26 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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: 3 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 ------------------------------------------------------------------------------------------------------------------------------------ 14804( 3) - 18-Aug-2017 14:57:26 - [ 5] Visit: G1 Visit Requirements: SCHED 100%; ORIENT 125D TO 135 D; BETWEEN 19-AUG-2017:00:00:00 AND 24-AUG-2017:00:00:00; ON HOLD On Hold Comments: Awaiting SGRB trigger 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 GRB170817A WFC3/IR MULTIAC GRISM1024 F110W NSAMP=7, SAMP-SEQ=STEP50 1 DEF PATTERN 3 1 CUM (297.692 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB170817A WFC3/IR MULTIAC GRISM1024 G102 NSAMP=10, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 2 CUM (1811.745 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB170817A 1 WFC3/IR MULTIAC GRISM102 F110W 1 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F110W 2 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F110W 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 1 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 2 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 4 none none none 1 N/A CUM 4 14804( 3) - 18-Aug-2017 14:57:26 - [ 6] Visit: G2 Visit Requirements: SCHED 100%; SAME ORIENT AS G1; BETWEEN 19-AUG-2017:00:00:00 AND 24-AUG-2017:00:00:00; ON HOLD On Hold Comments: Awaiting SGRB trigger 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 GRB170817A WFC3/IR MULTIAC GRISM1024 F160W NSAMP=7, SAMP-SEQ=STEP50 1 DEF PATTERN 3 1 CUM (297.692 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB170817A WFC3/IR MULTIAC GRISM1024 G141 NSAMP=10, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 2 CUM (1811.745 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB170817A 1 WFC3/IR MULTIAC GRISM102 F160W 1 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F160W 2 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F160W 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 1 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 2 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 4 none none none 1 N/A CUM 4 14804( 3) - 18-Aug-2017 14:57:26 - [ 7] Visit: G3 Visit Requirements: SCHED 100%; SAME ORIENT AS G1; BETWEEN 23-AUG-2017:00:00:00 AND 27-AUG-2017:00:00:00; ON HOLD On Hold Comments: Awaiting SGRB trigger 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 GRB170817A WFC3/IR MULTIAC GRISM1024 F110W NSAMP=7, SAMP-SEQ=STEP50 1 DEF PATTERN 3 1 CUM (297.692 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB170817A WFC3/IR MULTIAC GRISM1024 G102 NSAMP=10, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 2 CUM (1811.745 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB170817A 1 WFC3/IR MULTIAC GRISM102 F110W 1 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F110W 2 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F110W 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 1 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 2 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G102 4 none none none 1 N/A CUM 4 14804( 3) - 18-Aug-2017 14:57:26 - [ 8] Visit: G4 Visit Requirements: SCHED 100%; SAME ORIENT AS G1; BETWEEN 23-AUG-2017:00:00:00 AND 27-AUG-2017:00:00:00; ON HOLD On Hold Comments: Awaiting SGRB trigger 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 GRB170817A WFC3/IR MULTIAC GRISM1024 F160W NSAMP=7, SAMP-SEQ=STEP50 1 DEF PATTERN 3 1 CUM (297.692 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB170817A WFC3/IR MULTIAC GRISM1024 G141 NSAMP=10, SAMP-SEQ=SPARS50 1 DEF PATTERN 1 2 CUM (1811.745 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB170817A 1 WFC3/IR MULTIAC GRISM102 F160W 1 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F160W 2 none none none 1 N/A CUM 4 GRB170817A 1 WFC3/IR MULTIAC GRISM102 F160W 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 1 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 2 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 3 none none none 1 N/A CUM 4 GRB170817A 2 WFC3/IR MULTIAC GRISM102 G141 4 none none none 1 N/A CUM 4 14804( 3) - 18-Aug-2017 14:57:26 - [ 9] Summary Form for Proposal 14804 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures GRISM1024 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=10, NSAMP=7, SAMP-SEQ=SPARS50, SAMP-SEQ=STEP50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 19-AUG-2017:00:00:00 AND 24-AUG-2017:00:00:00, BETWEEN 23-AUG-2017:00:00:00 AND 27-AUG-2017:00:00:00, ON HOLD , ORIENT 125D TO 135 D, PATTERN 1 2, PATTERN 3 1, SAME ORIENT AS G1, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F160W, G102, G141 ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB170817A ------------------------------------------------------------------------------------------------------------------------------------