14901( 2) - 12-Jan-2017 13:21:56 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14901 Version: 2 Check-in Time: 12-Jan-2017 13:21:56 STScI Edit Number: 0 Title The UV behaviour of GRB 161219B/SN2016jca ------------------------------------------------------------------------------------ Type Cycle GO/DD 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Andrew James Levan The University of Warwick Y CoI: Dr. Andrew S. Fruchter Space Telescope Science Institute N CoI: Dr. Elena Pian Scuola Normale Superiore, Pisa N CoI: Prof. Nial Rahil Tanvir University of Leicester N CoI: Prof. Paolo A. Mazzali Liverpool John Moores University N ------------------------------------------------------------------------------------ Abstract The connection between long duration gamma-ray bursts and the stripped-envelope supernova is now secure, however, central questions remain about the nature of the supernovae and the power sources that drive them. Progress in these areas can be made through in-depth observations of nearby GRBs, in which the supernova light is sufficiently bright for detailed studies. However, such events are extremely rare, with only a handful of classical long-duration GRBs being found at z<0.2. Here we request observations of the recent GRB 161219B, and its supernova SN 2016jca. Utilising the unique ultraviolet capabilities of HST we will map the UV spectrum and its evolution with time. At a minimum, this will provide a route to tracking the afterglow and decomposing afterglow and supernova and host contributions -- diagnostics that ground-based observations alone struggle to achieve. However, our sensitive UV observations will also probe the UV properties of a GRB-SN for the first time, providing insight into the metal content of the progenitor, and crucially into the nature of the central engine, which may power the prompt emission of the burst, and continue to provide energy to event at much later times. Recent observations suggest that in extremum these engines may drive supernovae to exceptional luminosities (the so-called superluminous supernovae) and provide a link between the most powerful explosions in the Universe. Our observations may offer the route to identifying such an engine at work in a lower luminosity supernova, solidifying this link. ------------------------------------------------------------------------------------ Observations Description ------------------------ We request G280L spectroscopy of the afterglow/supernova assocaited with GRB 161219B at z=0.15. We will obtain a 4-point dither sequence of observations, as well as a short exposure in F390W for astrometric purposes that will also provide a photometric point and a measurement of the host galaxy. To provide a means of cosmic ray rejection we will obtain two short exposures, and to avoid buffer dump issues for the short exposures have placed them immediately before and after the grism observations. Given the position angle of the host galaxy a roll angle low in the available range (15-25 degrees) is ideal. ------------------------------------------------------------------------------------ 14901( 2) - 12-Jan-2017 13:21:56 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRB161219B GALAXY, HIGH REDSHIFT RA=06H06M51.3700S, J2000 V = 22 +/- 1 GALAXY DEC=-26D47'29.70" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 14901( 2) - 12-Jan-2017 13:21:56 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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 ------------------------------------------------------------------------------------------------------------------------------------ 14901( 2) - 12-Jan-2017 13:21:56 - [ 4] Visit: 01 Visit Requirements: SCHED 100%; ORIENT 15D TO 25 D; ON HOLD On Hold Comments: Awaiting Dark GRB position from Chandra 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 GRB161219B WFC3/UVI ACCUM G280-REF F200LP 1 200 S (200 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 GRB161219B WFC3/UVI ACCUM UVIS G280 CR-SPLIT=NO 1 390 S PATTERN 1 2 S (1560 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GRB161219B WFC3/UVI ACCUM G280-REF F200LP 1 200 S (200 POS TARG 0.099, 0.106 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ GRB161219B 1 WFC3/UVI ACCUM G280-REF F200LP none none none none 1 N/A S GRB161219B 2 WFC3/UVI ACCUM UVIS G280 1 none none none 1 N/A S GRB161219B 2 WFC3/UVI ACCUM UVIS G280 2 none none none 1 N/A S GRB161219B 2 WFC3/UVI ACCUM UVIS G280 3 none none none 1 N/A S GRB161219B 2 WFC3/UVI ACCUM UVIS G280 4 none none none 1 N/A S GRB161219B 3 WFC3/UVI ACCUM G280-REF F200LP none none none none 1 N/A S 14901( 2) - 12-Jan-2017 13:21:56 - [ 5] Summary Form for Proposal 14901 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures G280-REF, UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ON HOLD , ORIENT 15D TO 25 D, PATTERN 1 2, POS TARG 0, 0, POS TARG 0.099, 0.106, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F200LP, G280 ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRB161219B ------------------------------------------------------------------------------------------------------------------------------------