15878( 3) - 22-Aug-2019 15:19:12 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15878 Version: 3 Check-in Time: 22-Aug-2019 15:19:12 STScI Edit Number: 0 Title Uncovering the birthplace of FRBs ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jason X. Prochaska University of California - Santa Cruz Y CoI: Dr. Marc Rafelski Space Telescope Science Institute Y CoI: Dr. Stuart Ryder Macquarie University N CoI: Dr. Adam Travis Deller Swinburne University of Technology N CoI: Prof. Jean-Pierre Macquart University of Western Australia N CoI: Dr. Elaine M. Sadler University of Sydney N CoI: Dr. Ryan Shannon Swinburne University of Technology N CoI: Prof. Nicolas Tejos Pontificia Universidad Catolica de N Valparaiso CoI: Dr. Keith Bannister CSIRO, Australia Telescope National N Facility CoI: Cherie Day Swinburne University of Technology N ------------------------------------------------------------------------------------ Abstract Fast Radio Bursts (FRBs) are an enigmatic class of extragalactic object, whose study so far has been almost exclusively the domain of radio telescopes due to the inability to localize them to better than a few arcminutes. We propose to use HST to spatially resolve the morphology and distribution of star formation and stellar mass for the host galaxies of the first three non-repeating FRBs ever localized to <1" accuracy by the Australian SKA Pathfinder telescope. Analogous to previous advances with gamma-ray bursts, supernovae, and gravitational-wave counterparts, we will explore the origin of these FRBs through detailed examination of their host galaxies. By contrast with the dwarf galaxy host of the unusual repeating FRB 121102, our complementary ground-based observations have shown these non-repeating FRBs to lie in the outskirts of early-type galaxies having low star formation rates. However only HST offers the spatial resolution necessary to match the precision of the radio localizations in the ultraviolet through near-infrared that is required to properly characterize their environment, and thereby shed light on the nature of their progenitor objects. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program images three newly discovered FRB host galaxies to measure the distributions of the star formation and mass using WFC3 UVIS and IR. The sources are all moderately luminous galaxies at redshifts <0.5, enabling the observations in a single orbit per filter. The FUV and NUV will be sampled by the WFC3/UVIS F300X filter. This filter is the broadest FUV/NUV filter available on HST enabling us to trace recent star formation via young stars. This cleanly samples the rest-frame FUV and NUV continuum of our galaxies and provides the highest throughput possible for morphological measurements. The NIR will be sampled by the WFC3/IR F160W filter. This is the reddest wide 15878( 3) - 22-Aug-2019 15:19:12 - [ 2] filter available on HST to measure the distribution of the stellar mass as traced by the old stellar populations. In order to obtain images clean of cosmic rays and image artifacts and sampling the PSF phase, we use a minimum of four dither positions. For the UV measurements we will obtain four exposures, which also ensures no saturation for our bright targets. Given the short exposure times in F300X, this requires us to utilize 8-9e- post-flash to reach 12e- per pixel. To maximize UV throughput and minimize our pixel-based CTE correction, we place the target on chip 2 close to the readout. For the NIR observations, we wish to stay in the linear regime and minimize persistence with our bright targets, and therefore will use SPAR25 with NSAMP of 15 or 14. Since this sets the exposure time per dither position, we end up with 7 dither positions per orbit. For the WFC3/UVIS exposures we use a dither pattern that is 5 times the standard box pattern to remove residual background patterns and enable sky darks. For the WFC3/IR exposures we use the 7-point wide dither pattern from WFC3 ISR 2016-14 (pg 17) to get a good dither for the pixel phase and artificat mitigation. We multiply those values by 3 to better deal with IR blobs, and self persistence. We do not place any orient constraints on the program, which makes this easy to schedule. We therefore do not forsee any issues if we have to go to 1 gyro mode. We note that this means that the UV and IR overlap in our area of interest, but depending on the orient they will not overlap significantly in other areas. ------------------------------------------------------------------------------------ 15878( 3) - 22-Aug-2019 15:19:12 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 FRB180924 GALAXY, HIGH REDSHIFT RA=21H44M25.2301S, J2000 V = 20.5 +/- 0.3 GALAXY DEC=-40D53'59.73" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 FRB190102 GALAXY, HIGH REDSHIFT RA=21H29M39.7008S, J2000 V = 21.1 +/- 0.3 GALAXY DEC=-79D28'32.30" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 FRB190608 GALAXY, HIGH REDSHIFT RA=22H16M4.9000S, J2000 V = 17.65 GALAXY DEC=-07D53'56.00" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 15878( 3) - 22-Aug-2019 15:19:12 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.865 Line_Spacing 0.56 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 15878( 3) - 22-Aug-2019 15:19:12 - [ 5] Visit: 01 (FRB180924UV) 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 FRB180924 WFC3/UVI ACCUM UVIS2-C1K F300X FLASH=9 1 623 S PATTERN 1 1 S 1C-CTE (2492 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB180924 1 WFC3/UVI ACCUM UVIS2-C1 F300X 1 none none none 1 N/A S K1C-CTE FRB180924 1 WFC3/UVI ACCUM UVIS2-C1 F300X 2 none none none 1 N/A S K1C-CTE FRB180924 1 WFC3/UVI ACCUM UVIS2-C1 F300X 3 none none none 1 N/A S K1C-CTE FRB180924 1 WFC3/UVI ACCUM UVIS2-C1 F300X 4 none none none 1 N/A S K1C-CTE 15878( 3) - 22-Aug-2019 15:19:12 - [ 6] Visit: 02 (FRB180924IR) 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 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 2.091, 0.162 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 4.179, 0.324 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 0.174, 1.92 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 2.265, 2.082 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 4.356, 1.881 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 FRB180924 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 1.164, 3.843 CUM (352.94 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB180924 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB180924 2 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB180924 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB180924 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB180924 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB180924 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB180924 7 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM 15878( 3) - 22-Aug-2019 15:19:12 - [ 7] Visit: 03 (FRB190102UV) 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 FRB190102 WFC3/UVI ACCUM UVIS2-C1K F300X FLASH=8 1 694 S PATTERN 1 1 S 1C-CTE (2776 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB190102 1 WFC3/UVI ACCUM UVIS2-C1 F300X 1 none none none 1 N/A S K1C-CTE FRB190102 1 WFC3/UVI ACCUM UVIS2-C1 F300X 2 none none none 1 N/A S K1C-CTE FRB190102 1 WFC3/UVI ACCUM UVIS2-C1 F300X 3 none none none 1 N/A S K1C-CTE FRB190102 1 WFC3/UVI ACCUM UVIS2-C1 F300X 4 none none none 1 N/A S K1C-CTE 15878( 3) - 22-Aug-2019 15:19:12 - [ 8] Visit: 04 (FRB190102IR) 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 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 2.091, 0.162 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 4.179, 0.324 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 0.174, 1.92 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 2.265, 2.082 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 4.356, 1.881 CUM (352.94 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 FRB190102 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF POS TARG 1.164, 3.843 CUM (352.94 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB190102 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190102 2 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190102 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190102 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190102 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190102 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190102 7 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM 15878( 3) - 22-Aug-2019 15:19:12 - [ 9] Visit: 05 (FRB190608UV) 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 FRB190608 WFC3/UVI ACCUM UVIS2-C1K F300X FLASH=9 1 600 S PATTERN 1 1 S 1C-CTE (2400 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB190608 1 WFC3/UVI ACCUM UVIS2-C1 F300X 1 none none none 1 N/A S K1C-CTE FRB190608 1 WFC3/UVI ACCUM UVIS2-C1 F300X 2 none none none 1 N/A S K1C-CTE FRB190608 1 WFC3/UVI ACCUM UVIS2-C1 F300X 3 none none none 1 N/A S K1C-CTE FRB190608 1 WFC3/UVI ACCUM UVIS2-C1 F300X 4 none none none 1 N/A S K1C-CTE 15878( 3) - 22-Aug-2019 15:19:12 - [ 10] Visit: 06 (FRB190608IR) 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 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF CUM (327.939 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF POS TARG 2.091, 0.162 CUM (327.939 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF POS TARG 4.179, 0.324 CUM (327.939 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF POS TARG 0.174, 1.92 CUM (327.939 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF POS TARG 2.265, 2.082 CUM (327.939 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF POS TARG 4.356, 1.881 CUM (327.939 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 FRB190608 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 1 DEF POS TARG 1.164, 3.843 CUM (327.939 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB190608 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190608 2 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190608 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190608 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM 15878( 3) - 22-Aug-2019 15:19:12 - [ 11] 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 | ------------------------------------------------------------------------------------------------------------------------------------ FRB190608 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190608 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM FRB190608 7 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM 15878( 3) - 22-Aug-2019 15:19:12 - [ 12] Summary Form for Proposal 15878 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS2-C1K1C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=8, FLASH=9, NSAMP=14, NSAMP=15, SAMP-SEQ=SPARS25 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, POS TARG 0.174, 1.92, POS TARG 1.164, 3.843, POS TARG 2.091, 0.162, POS TARG 2.265, 2.082, POS TARG 4.179, 0.324, POS TARG 4.356, 1.881 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F300X ------------------------------------------------------------------------------------------------------------------------------------ Target Names FRB180924, FRB190102, FRB190608 ------------------------------------------------------------------------------------------------------------------------------------