14075( 4) - 28-Sep-2015 20:24:47 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14075 Version: 4 Check-in Time: 28-Sep-2015 20:24:47 STScI Edit Number: 1 Title Long-Lost Companions: A Search for the Binary Secondaries of Three Nearby Supernovae ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ori Dosovitz Fox Space Telescope Science Institute Y CoI: Dr. Schuyler D. Van Dyk California Institute of Technology N CoI: Prof. Alex V. Filippenko University of California - Berkeley N CoI: Dr. Selma E. de Mink Universiteit van Amsterdam N CoI: Dr. Nathan Smith University of Arizona N CoI: Dr. Stuart Ryder Australian Astronomical Observatory N CoI: Dr. Jeffrey M. Silverman University of Texas at Austin N CoI: Dr. Patrick Kelly University of California - Berkeley N CoI: Dr. Jon Mauerhan University of California - Berkeley N CoI: Dr. Emmanouil Zapartas Universiteit van Amsterdam N CoI: Dr. WeiKang Zheng University of California - Berkeley N CoI: Ms. K. Azalee Bostroem University of California - Davis N CoI: Mr. Isaac Shivvers University of California - Berkeley N CoI: Mr. Heechan Yuk University of California - Berkeley N ------------------------------------------------------------------------------------ Abstract Stripped-envelope supernovae (e.g., SNe IIb, Ib, and Ic) refer to a subset of core-collapse explosions with progenitors that have lost some fraction of their outer hydrogen and helium envelopes in pre-SN mass loss. Mounting evidence over the past decade suggests that the mass loss in a large fraction of these systems occurs due to binary interaction. An unbiased sample of companion-star characteristics (including deep upper limits) can constrain the binary models, but to date only two results have been published: SNe 1993J and 2011dh. In this proposal, we present 2 new archival discoveries and a plan to perform a WFC3/NUV search for the binary companion stars of 3 additional, nearby stripped-envelope SN progenitors: SNe 2002ap, 2001ig, and 2010br. The NUV color (F275W-F336W) offers an optimum detection strategy for the potential hot, blue stars. The combined dataset will result in a statistically meaningful sample of companion stars, with direct implications on the theoretical physics of binary interaction. Such a project cannot wait for more nearby SNe. Only 15 stripped-envelope SNe have occurred within our calculated sensitivity window (<15 Mpc) within the past 25 years, and of those, only 6 were at <10 Mpc. Given HST's time horizon (currently 2018), the degrading UV response on WFC3, and the requisite waiting period to allow the SN to fade before conducting a companion search, now is the time to take full advantage of HST's unique UV capabilities. ------------------------------------------------------------------------------------ Observations Description ------------------------ WFC3: - Use entire array to aquire fiducial stars for alignment purposes - EXPTIME (actual): 14075( 4) - 28-Sep-2015 20:24:47 - [ 2] -SN 2002ap -F275W (2778 s) -F336W (2778 s) -SN 2001ig -F275W (8661 s) -F336W (2920 s) -SN 2010br -F275W (5752 s) -F336W (2920 s) - FLASH = 12 e- - To be safe - 2 pt WFC3-UVIS-DITHER-LINE -Provides optimal 2-step sampling of the PSF; produces spacings of >1 column for removal of hot columns - remove CR and hot pixels ------------------------------------------------------------------------------------ 14075( 4) - 28-Sep-2015 20:24:47 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN-2002AP EXT-STAR, SUPERNOVA, RA=01H36M23.8700S, J2000 V = 25.0 SUPERNOVA TYPE IB DEC=+15D45'13.00" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2001IG EXT-STAR, SUPERNOVA, RA=22H57M30.7400S, J2000 V = 25.4 SUPERNOVA TYPE II DEC=-41D02'26.10" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2010BR EXT-STAR, SUPERNOVA, RA=12H03M10.9600S, J2000 V = 26.1 SUPERNOVA TYPE IB DEC=+44D31'42.80" Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 14075( 4) - 28-Sep-2015 20:24:47 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 14075( 4) - 28-Sep-2015 20:24:47 - [ 5] Visit: 01 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-2002AP WFC3/UVI ACCUM UVIS2 F275W FLASH=8 1 1000 S GS ACQ SCENARIO BASE1B3; S see below PATTERN 1 1-2 (2778 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2002AP WFC3/UVI ACCUM UVIS2 F336W FLASH=8 1 1000 S S see below (2778 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-2002AP 1 WFC3/UVI ACCUM UVIS2 F275W 1 none none none 1 1361.0 S S SN-2002AP 1 WFC3/UVI ACCUM UVIS2 F275W 2 none none none 2 1417.0 S S SN-2002AP 2 WFC3/UVI ACCUM UVIS2 F336W 1 none none none 1 1361.0 S S SN-2002AP 2 WFC3/UVI ACCUM UVIS2 F336W 2 none none none 2 1417.0 S S 14075( 4) - 28-Sep-2015 20:24:47 - [ 6] Visit: 02 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-2001IG WFC3/UVI ACCUM UVIS2 F275W FLASH=9 1 1000 S PATTERN 1 1-4 S see below (2887 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2001IG WFC3/UVI ACCUM UVIS2 F275W FLASH=9 1 1000 S S see below (2887 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2001IG WFC3/UVI ACCUM UVIS2 F275W FLASH=9 1 1000 S S see below (2920 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN-2001IG WFC3/UVI ACCUM UVIS2 F336W FLASH=9 1 1000 S S see below (2920 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-2001IG 1 WFC3/UVI ACCUM UVIS2 F275W 1 none none none 1 1416.0 S S SN-2001IG 1 WFC3/UVI ACCUM UVIS2 F275W 2 none none none 3 1471.0 S S SN-2001IG 2 WFC3/UVI ACCUM UVIS2 F275W 1 none none none 1 1416.0 S S SN-2001IG 2 WFC3/UVI ACCUM UVIS2 F275W 2 none none none 3 1471.0 S S SN-2001IG 3 WFC3/UVI ACCUM UVIS2 F275W 1 none none none 2 1460.0 S S SN-2001IG 3 WFC3/UVI ACCUM UVIS2 F275W 2 none none none 4 1460.0 S S SN-2001IG 4 WFC3/UVI ACCUM UVIS2 F336W 1 none none none 2 1460.0 S S SN-2001IG 4 WFC3/UVI ACCUM UVIS2 F336W 2 none none none 4 1460.0 S S 14075( 4) - 28-Sep-2015 20:24:47 - [ 7] Visit: 03 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-2010BR WFC3/UVI ACCUM UVIS2 F275W FLASH=9 1 1000 S PATTERN 1 1-3 S see below (2876 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN-2010BR WFC3/UVI ACCUM UVIS2 F275W FLASH=9 1 1000 S S see below (2876 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN-2010BR WFC3/UVI ACCUM UVIS2 F336W FLASH=9 1 1000 S S see below (2920 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-2010BR 1 WFC3/UVI ACCUM UVIS2 F275W 1 none none none 1 1416.0 S S SN-2010BR 1 WFC3/UVI ACCUM UVIS2 F275W 2 none none none 2 1460.0 S S SN-2010BR 2 WFC3/UVI ACCUM UVIS2 F275W 1 none none none 1 1416.0 S S SN-2010BR 2 WFC3/UVI ACCUM UVIS2 F275W 2 none none none 3 1460.0 S S SN-2010BR 3 WFC3/UVI ACCUM UVIS2 F336W 1 none none none 2 1460.0 S S SN-2010BR 3 WFC3/UVI ACCUM UVIS2 F336W 2 none none none 3 1460.0 S S 14075( 4) - 28-Sep-2015 20:24:47 - [ 8] Summary Form for Proposal 14075 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=8, FLASH=9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1B3, PATTERN 1 1-2, PATTERN 1 1-3, PATTERN 1 1-4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W, F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN-2001IG, SN-2002AP, SN-2010BR ------------------------------------------------------------------------------------------------------------------------------------