17813( 3) - 04-Sep-2025 17:39:54 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17813 Version: 3 Check-in Time: 04-Sep-2025 17:39:54 STScI Edit Number: 0 Title A Deep Search for the Surviving Companion to the SN 2016gkg Progenitor ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ori Dosovitz Fox Space Telescope Science Institute Y CoI: Dr. Jennifer Andrews NOIRLab - Gemini North (HI) N CoI: Dr. Kyra Azalee Bostroem University of Arizona N CoI: Maria Drout University of Toronto N CoI: Prof. Alex V. Filippenko University of California - Berkeley N CoI: Dr. Patrick Kelly University of Minnesota - Twin Cities N CoI: Dr. Dan Milisavljevic Purdue University N CoI: Prof. Selma E. de Mink Max Planck Institute for Astrophysics N CoI: Dr. Stuart Ryder Macquarie University N CoI: Dr. Nathan Smith University of Arizona N CoI: Dr. Niharika Sravan Drexel University N CoI: Dr. Schuyler D. Van Dyk California Institute of Technology N CoI: Dr. Benjamin F. Williams University of Washington N CoI: Dr. Emmanouil Zapartas FORTH - Institute of Astrophysics N CoI: Dr. WeiKang Zheng University of California - Berkeley N CoI: Dr. Sebastian Gomez University of Texas at Austin N CoI: Dr. Justin Pierel Space Telescope Science Institute N CoI: Dr. Melissa Shahbandeh Space Telescope Science Institute N CoI: Dr. Armin Rest Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract Binary physics is an area of growing interest given the implications on a wide range of stellar systems, including merger sources for gravitational waves. Identification of progenitors to stripped-envelope supernovae (SESNe) offers a direct approach to constraining binary evolution scenarios. While the pathway by which SESN progenitor stars lose their envelope remains ambiguous (single vs. binary models), growing evidence suggests most SESN progenitors (>50%) are in binary systems. In just the past few years, the number of direct detections of surviving companions has grown to five. While exciting, the sample is still too small to make statistically meaningful conclusions about either the population or the binary physics itself. Increasing the sample size is slow given the small number of viable candidates, which means that each new data point is significant. Here we propose deep WFC3/UVIS optical+UV observations of the only relevant target for Cycle 32: SN 2016gkg at <26 Mpc. Similar to other companion searches, we aim to detect or place meaningful limits on any surviving companion. We also include one orbit to obtain F555W astrometry on the recent SESN 2023mut for potential future follow-up studies. This experiment will take advantage of HST's unique UV capabilities and will help build a statistically significant sample that will affect our fundamental understanding of binary evolution. The combined low likelihood of future events and HST's expected lifetime make these observations all the more critical. ------------------------------------------------------------------------------------ 17813( 3) - 04-Sep-2025 17:39:54 - [ 2] Observations Description ------------------------ WFC3: - Use entire array to aquire fiducial stars for alignment purposes - Use 512_UVIS2_CTE aperture to minimize photon transfer losses - When scheduled, please have CS contact PI to finalize pos_tag based on final orientation - EXPTIME (actual): -SN iPTF13bvn (12 orbits) -F336W (17500 s) -F555W (13500 s) - FLASH = varies with aim of minimizing photon transfer losses and read noise - Here is the situation: *We are trying to detect a single, very faint source (surviving star from a supernova). We only care about one position, not the entire field. *We have placed the pointing in the center of the UVIS2-512C-CTE aperture, so that will help with the CTE. *We are not sure what the background from the galaxy looks like, but it may contribute to the flux slightly (or not at all). *It is easy to adjust the Flash value in APT to turn the warning off, but we are hoping we aren't adding too much noise unnecessarily, as this source is faint. -For dithering, we use 5 different POS TARGS instead *Impact of Gyros* We have considered the impact of reduced gyro operations on our program, which has 12 orbits requested. We were able to successfully reduce this target to 4 visits, each with 3 orits per visit. The only condition is that all filters must be obtained in the same orientation for several reasons, including time variablility and optimized sampling and reductions. Therefore, we have added the constraint that all be scheduled within 1 day of each other. ------------------------------------------------------------------------------------ 17813( 3) - 04-Sep-2025 17:39:54 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2016GKG EXT-STAR, SUPERNOVA RA=01H34M14.4400S, J2000 V = 25 TYPE IB DEC=-29D26'24.22" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2023MUT EXT-STAR, SUPERNOVA RA=04H48M34.3480S, J2000 V = 25 TYPE IB DEC=+00D14'48.31" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17813( 3) - 04-Sep-2025 17:39:54 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17813( 3) - 04-Sep-2025 17:39:54 - [ 5] Visit: 01 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 0, 0 S 2C-CTE see below (1385 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 0, 0 S 2C-CTE see below (1052 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1385.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1052.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 6] Visit: 02 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 0.1719, 0.1970 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 0.1719, 0.1970 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 7] Visit: 03 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 0.3437, 0.3542 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 0.3437, 0.3542 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 8] Visit: 04 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 1, 0 S 2C-CTE see below (1385 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 1, 0 S 2C-CTE see below (1052 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1385.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1052.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 9] Visit: 05 (SN2023mut) 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-2023MUT WFC3/UVI ACCUM UVIS2 F555W FLASH=4 1 700 S PATTERN 1 1 S see below (2221 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-2023MUT 1 WFC3/UVI ACCUM UVIS2 F555W 1 none none none 1 555.0 S S SN-2023MUT 1 WFC3/UVI ACCUM UVIS2 F555W 2 none none none 1 555.0 S S SN-2023MUT 1 WFC3/UVI ACCUM UVIS2 F555W 3 none none none 1 555.0 S S SN-2023MUT 1 WFC3/UVI ACCUM UVIS2 F555W 4 none none none 1 556.0 S S 17813( 3) - 04-Sep-2025 17:39:54 - [ 10] Visit: 06 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 1.1719, 0.1970 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 1.1719, 0.1970 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 11] Visit: 07 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 1.3437, 0.3542 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 1.3437, 0.3542 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 12] Visit: 08 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 0, 1 S 2C-CTE see below (1385 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 0, 1 S 2C-CTE see below (1052 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1385.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1052.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 13] Visit: 09 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 0.1719, 1.1970 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 0.1719, 1.1970 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 14] Visit: 10 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 0.3437, 1.3542 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 0.3437, 1.3542 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 15] Visit: 11 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 1, 1 S 2C-CTE see below (1385 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 1, 1 S 2C-CTE see below (1052 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1385.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1052.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 16] Visit: 12 (iPTF16gkg) 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 1.1719, 1.1970 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 1.1719, 1.1970 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 17] Visit: 13 (iPTF16gkg) Visit Requirements: GROUP 13, 01, 02, 03, 04, 06, 07, 08, 09, 10, 11, 12 WITHIN 7D 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-2016GKG WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=12 1 2500 S POS TARG 1.3437, 1.3542 S 2C-CTE see below (1383 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2016GKG WFC3/UVI ACCUM UVIS2-C51 F555W 1 2500 S POS TARG 1.3437, 1.3542 S 2C-CTE see below (1053 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-2016GKG 1 WFC3/UVI ACCUM UVIS2-C5 F336W none none none none 1 1383.0 S S 12C-CTE SN-2016GKG 2 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 1053.0 S S 12C-CTE 17813( 3) - 04-Sep-2025 17:39:54 - [ 18] Summary Form for Proposal 17813 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2, UVIS2-C512C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=12, FLASH=4 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 13, 01, 02, 03, 04, 06, 07, 08, 09, 10, 11, 12 WITHIN 7D, PATTERN 1 1, POS TARG 0, 0, POS TARG 0, 1, POS TARG 0.1719, 0.1970, POS TARG 0.1719, 1.1970, POS TARG 0.3437, 0.3542, POS TARG 0.3437, 1.3542, POS TARG 1, 0, POS TARG 1, 1, POS TARG 1.1719, 0.1970, POS TARG 1.1719, 1.1970, POS TARG 1.3437, 0.3542, POS TARG 1.3437, 1.3542 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W, F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN-2016GKG, SN-2023MUT ------------------------------------------------------------------------------------------------------------------------------------