16671( 2) - 26-Jul-2021 10:51:49 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16671 Version: 2 Check-in Time: 26-Jul-2021 10:51:49 STScI Edit Number: 0 Title Unveiling the nature of interacting supernovae or supernova impostors ------------------------------------------------------------------------------------ Type Cycle GO 29 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Nancy Elias-Rosa Osservatorio Astronomico di Padova Y CoI: Dr. Schuyler D. Van Dyk California Institute of Technology N CoI: Dr. Morgan Fraser University College Dublin N CoI: Mr. Sean Brennan University College Dublin N ------------------------------------------------------------------------------------ Abstract Some apparent supernovae (SNe) with strong circumstellar interaction are likely the explosion of very massive stars. Surprisingly, a significant fraction of these explosions is preceded by outbursts from weeks to years before. When and why outbursts herald terminal SN explosions is still unknown. Moreover, in some cases, it is not even clear whether the star has undergone a terminal SN explosion or has rather experienced an extreme, but non-terminal, eruption as a "supernova impostor''. To answer these questions, we must first obtain clear evidence that these stars have indeed undergone a core-collapse supernova explosion. We propose to use HST+WFC3 to visit the field of four of these transients after they have faded to obtain a deep, high-resolution image. This will allow us to search for (or place limits on) any surviving stellar progenitor and hence test whether these are terminal explosions or not. ------------------------------------------------------------------------------------ Observations Description ------------------------ Our HST observations will focus on sampling the entire spectral energy distribution of four nearby (<30 Mpc) supernova (SN) impostors with deep imaging of their sites in the most similar filters to those used at the pre-discovery observations. We are looking to compare magnitude changes without an additional source of error from large color terms and set a robust limit on the bolometric luminosity of any source at the transient. (1) We will observe the SN 2015bh site using WFC3/UVIS with F438W, F606W and F814W and a pattern of 3 dither positions to achieve a 5sigma detection at > 26 mag. Similarly, we estimate we can reach a 4.5sigma limiting magnitude at H ~25 using WFC3/IR with F160W. Allowing 6.5 min for target acquisition and ~13 min per intermittent overheads and pointing maneuvers, we calculate ~53 min for 2 exposures per each UVIS filter, which is within the visibility for an orbit. Similarly, we estimate the reminding WFC3/UVIS observations and F160W, accounting for readout, guide-star, (re)-acquisition and switching between UVIS and IR channels, will take approximately 53 minutes, again within a single orbit. (2) We request F350LP, F555W and F814W images of the AT 2016jbu's site using WFC3/UVIS, reaching between 5 and 10sigma at > 26 mag. Additionally, we will 16671( 2) - 26-Jul-2021 10:51:49 - [ 2] obtain images in the IR using WFPC3/IR in the F160W filter. Considering target acquisition, overheads and pointing maneuvers, we need 2 orbits again. (3) We will observe SN 2013gc in F438W, F606W and F814W, with the addition of F160W. We estimate observations in these four filters while aiming to achieve a 5sigma limiting magnitude at ~25 mag, accounting for readout, guide-star, (re)-acquisition and switching between UVIS and IR channels, will be obtainable within 2 orbits. (4) SN 2009ip will also be observed with F438W, F606W, F814W using WFC3/UVIS, and F160W using WFC3/IR. Allowing for the necessary overheads, this is achievable within 2 orbits. We, therefore, use 8 orbits to obtain observations of our SN 2009ip-like transient sample. We use point dithering to correct for cosmic rays and hot pixels and to improve the sampling of the point spread function. We exploit the entire detector in each case, placing our targets in the optimal position on the chips according to their location in the host galaxy. For each case, we have sought a compromise between having the highest number of reference stars with a high enough S/N for accurate astrometric registration. ------------------------------------------------------------------------------------ 16671( 2) - 26-Jul-2021 10:51:49 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2015BH STAR, LUMINOUS BLUE RA=09H09M35.3500S, J2000 V = 26 VARIABLE, SUPERNOVA DEC=+33D06'57.60" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 2 AT-2016JBU STAR, LUMINOUS BLUE RA=07H36M25.9800S, J2000 V = 26 VARIABLE, SUPERNOVA DEC=-69D32'55.40" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2013GC STAR, LUMINOUS BLUE RA=08H07M11.8800S, J2000 V = 25 VARIABLE, SUPERNOVA DEC=-28D03'26.30" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2009IP STAR, LUMINOUS BLUE RA=22H23M8.2600S, J2000 V = 26.5 VARIABLE, SUPERNOVA DEC=-28D56'52.40" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 16671( 2) - 26-Jul-2021 10:51:49 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 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 ------------------------------------------------------------------------------------------------------------------------------------ 16671( 2) - 26-Jul-2021 10:51:49 - [ 5] Visit: 01 (SN2015bh) 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 SN-2015BH WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S POS TARG 0, 0 S see below (352 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2015BH WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S POS TARG 0, 0 S see below (352 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2015BH WFC3/UVI ACCUM UVIS2 F606W 1 350 S POS TARG 0, 0 S see below (352 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2015BH WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S POS TARG 0.092, 0.098 S see below (352 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN-2015BH WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S POS TARG 0.092, 0.098 S see below (352 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN-2015BH WFC3/UVI ACCUM UVIS2 F606W FLASH=1 1 250 S POS TARG 0.092, 0.098 S see below (252 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SN-2015BH WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S POS TARG 0.185, 0.197 S see below (366 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 SN-2015BH WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S POS TARG 0.185, 0.197 S see below (366 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 SN-2015BH WFC3/UVI ACCUM UVIS2 F606W 1 350 S POS TARG 0.185, 0.197 S see below (366 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 SN-2015BH WFC3/IR MULTIAC IR-UVIS F160W SAMP-SEQ=SPARS25, NSAMP=15 1 DEF PATTERN 4 10 CUM (1058.819 S) ------------------------------------------------------------------------------------------------------------------------------------ 16671( 2) - 26-Jul-2021 10:51:49 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2015BH 1 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 352.0 S S SN-2015BH 2 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 352.0 S S SN-2015BH 3 WFC3/UVI ACCUM UVIS2 F606W none none none none 1 352.0 S S SN-2015BH 4 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 352.0 S S SN-2015BH 5 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 352.0 S S SN-2015BH 6 WFC3/UVI ACCUM UVIS2 F606W none none none none 1 252.0 S S SN-2015BH 7 WFC3/UVI ACCUM UVIS2 F438W none none none none 2 366.0 S S SN-2015BH 8 WFC3/UVI ACCUM UVIS2 F814W none none none none 2 366.0 S S SN-2015BH 9 WFC3/UVI ACCUM UVIS2 F606W none none none none 2 366.0 S S SN-2015BH 10 WFC3/IR MULTIAC IR-UVIS F160W 1 none none none 2 N/A CUM SN-2015BH 10 WFC3/IR MULTIAC IR-UVIS F160W 2 none none none 2 N/A CUM SN-2015BH 10 WFC3/IR MULTIAC IR-UVIS F160W 3 none none none 2 N/A CUM 16671( 2) - 26-Jul-2021 10:51:49 - [ 7] Visit: 02 (AT2016jbu) 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 AT-2016JBU WFC3/UVI ACCUM UVIS2 F350LP 1 385 S PATTERN 3 1-3 S (1155 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 AT-2016JBU WFC3/UVI ACCUM UVIS2 F555W FLASH=1 1 390 S S (1170 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 AT-2016JBU WFC3/UVI ACCUM UVIS2 F814W FLASH=3 1 390 S S (1170 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 AT-2016JBU WFC3/IR MULTIAC IR-UVIS F160W SAMP-SEQ=SPARS50, NSAMP=9 1 DEF PATTERN 4 4 CUM (1208.808 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT-2016JBU 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S AT-2016JBU 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S AT-2016JBU 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 2 N/A S AT-2016JBU 2 WFC3/UVI ACCUM UVIS2 F555W 1 none none none 1 N/A S AT-2016JBU 2 WFC3/UVI ACCUM UVIS2 F555W 2 none none none 1 N/A S AT-2016JBU 2 WFC3/UVI ACCUM UVIS2 F555W 3 none none none 2 N/A S AT-2016JBU 3 WFC3/UVI ACCUM UVIS2 F814W 1 none none none 1 N/A S AT-2016JBU 3 WFC3/UVI ACCUM UVIS2 F814W 2 none none none 1 N/A S AT-2016JBU 3 WFC3/UVI ACCUM UVIS2 F814W 3 none none none 2 N/A S AT-2016JBU 4 WFC3/IR MULTIAC IR-UVIS F160W 1 none none none 2 N/A CUM AT-2016JBU 4 WFC3/IR MULTIAC IR-UVIS F160W 2 none none none 2 N/A CUM 16671( 2) - 26-Jul-2021 10:51:49 - [ 8] 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 | ------------------------------------------------------------------------------------------------------------------------------------ AT-2016JBU 4 WFC3/IR MULTIAC IR-UVIS F160W 3 none none none 2 N/A CUM 16671( 2) - 26-Jul-2021 10:51:49 - [ 9] Visit: 03 (SN2013gc) 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 SN-2013GC WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2013GC WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2013GC WFC3/UVI ACCUM UVIS2 F606W 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2013GC WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S (350 POS TARG 0.092, 0.098 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN-2013GC WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S (350 POS TARG 0.092, 0.098 S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN-2013GC WFC3/UVI ACCUM UVIS2 F606W FLASH=2 1 250 S (250 POS TARG 0.092, 0.098 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SN-2013GC WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S POS TARG 0.185, 0.197 S see below (361 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 SN-2013GC WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S POS TARG 0.185, 0.197 S see below (361 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 SN-2013GC WFC3/UVI ACCUM UVIS2 F606W 1 350 S POS TARG 0.185, 0.197 S see below (361 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 SN-2013GC WFC3/IR MULTIAC IR-UVIS F160W SAMP-SEQ=SPARS25, NSAMP=15 1 DEF PATTERN 4 10 CUM (1058.819 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2013GC 1 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 N/A S 16671( 2) - 26-Jul-2021 10:51:49 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2013GC 2 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S SN-2013GC 3 WFC3/UVI ACCUM UVIS2 F606W none none none none 1 N/A S SN-2013GC 4 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 N/A S SN-2013GC 5 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S SN-2013GC 6 WFC3/UVI ACCUM UVIS2 F606W none none none none 1 N/A S SN-2013GC 7 WFC3/UVI ACCUM UVIS2 F438W none none none none 2 361.0 S S SN-2013GC 8 WFC3/UVI ACCUM UVIS2 F814W none none none none 2 361.0 S S SN-2013GC 9 WFC3/UVI ACCUM UVIS2 F606W none none none none 2 361.0 S S SN-2013GC 10 WFC3/IR MULTIAC IR-UVIS F160W 1 none none none 2 N/A CUM SN-2013GC 10 WFC3/IR MULTIAC IR-UVIS F160W 2 none none none 2 N/A CUM SN-2013GC 10 WFC3/IR MULTIAC IR-UVIS F160W 3 none none none 2 N/A CUM 16671( 2) - 26-Jul-2021 10:51:49 - [ 11] Visit: 04 (SN2009ip) 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 SN-2009IP WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2009IP WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2009IP WFC3/UVI ACCUM UVIS2 F606W 1 350 S (350 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2009IP WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S (350 POS TARG 0.092, 0.098 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN-2009IP WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S (350 POS TARG 0.092, 0.098 S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN-2009IP WFC3/UVI ACCUM UVIS2 F606W FLASH=2 1 250 S (250 POS TARG 0.092, 0.098 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SN-2009IP WFC3/UVI ACCUM UVIS2 F438W FLASH=9 1 350 S POS TARG 0.185, 0.197 S see below (361 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 SN-2009IP WFC3/UVI ACCUM UVIS2 F814W FLASH=4 1 350 S POS TARG 0.185, 0.197 S see below (361 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 SN-2009IP WFC3/UVI ACCUM UVIS2 F606W 1 350 S POS TARG 0.185, 0.197 S see below (361 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 SN-2009IP WFC3/IR MULTIAC IR-UVIS F160W SAMP-SEQ=SPARS25, NSAMP=15 1 DEF PATTERN 4 10 CUM (1058.819 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2009IP 1 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 N/A S 16671( 2) - 26-Jul-2021 10:51:49 - [ 12] 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN-2009IP 2 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S SN-2009IP 3 WFC3/UVI ACCUM UVIS2 F606W none none none none 1 N/A S SN-2009IP 4 WFC3/UVI ACCUM UVIS2 F438W none none none none 1 N/A S SN-2009IP 5 WFC3/UVI ACCUM UVIS2 F814W none none none none 1 N/A S SN-2009IP 6 WFC3/UVI ACCUM UVIS2 F606W none none none none 1 N/A S SN-2009IP 7 WFC3/UVI ACCUM UVIS2 F438W none none none none 2 361.0 S S SN-2009IP 8 WFC3/UVI ACCUM UVIS2 F814W none none none none 2 361.0 S S SN-2009IP 9 WFC3/UVI ACCUM UVIS2 F606W none none none none 2 361.0 S S SN-2009IP 10 WFC3/IR MULTIAC IR-UVIS F160W 1 none none none 2 N/A CUM SN-2009IP 10 WFC3/IR MULTIAC IR-UVIS F160W 2 none none none 2 N/A CUM SN-2009IP 10 WFC3/IR MULTIAC IR-UVIS F160W 3 none none none 2 N/A CUM 16671( 2) - 26-Jul-2021 10:51:49 - [ 13] Summary Form for Proposal 16671 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-UVIS, UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=1, FLASH=2, FLASH=3, FLASH=4, FLASH=9, NSAMP=15, NSAMP=9, SAMP-SEQ=SPARS25, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 3 1-3, PATTERN 4 10, PATTERN 4 4, POS TARG 0, 0, POS TARG 0.092, 0.098, POS TARG 0.185, 0.197 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F350LP, F438W, F555W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names AT-2016JBU, SN-2009IP, SN-2013GC, SN-2015BH ------------------------------------------------------------------------------------------------------------------------------------