Long-Lost Companions: A Search for the Binary Secondaries of Three Nearby Supernovae

0 Assigned ID: 306 ----- Attempting Submission 1 (Thu Apr 09 23:44:14 GMT 2015) ----- HST Phase I Proposal 306 (fox_hst23_companion_v2.apt) successfully submitted. Receipt: # 306-1 ----- Attempting Submission 2 (Fri Apr 10 22:34:49 GMT 2015) ----- HST Phase I Proposal 306 (fox_hst23_companion_v2.apt) successfully submitted. Receipt: # 306-2 ----- Attempting Submission 3 (Fri Apr 10 23:04:51 GMT 2015) ----- HST Phase I Proposal 306 (fox_hst23_companion_v2.apt) successfully submitted. Receipt: # 306-3 ----- Attempting Submission 4 (Fri Apr 10 23:30:35 GMT 2015) ----- HST Phase I Proposal 306 (fox_hst23_companion_v2.apt) successfully submitted. Receipt: # 306-4 ----- Attempting Submission 5 (Fri Apr 10 23:39:36 GMT 2015) ----- HST Phase I Proposal 306 (fox_hst23_companion_v2.apt) successfully submitted. Receipt: # 306-5 ----- Attempting Submission 6 (Fri Apr 10 23:49:24 GMT 2015) ----- HST Phase I Proposal 306 (fox_hst23_companion_v2.apt) successfully submitted. Receipt: # 306-6 Version 2, updated coordinates for 01ig. 1703447696 ----- Attempting Submission 1 (Tue Jul 14 16:41:18 GMT 2015) ----- HST Phase II Proposal 14075 (fox_hst23_companion_phas2.apt) successfully submitted. Receipt: # 14075-1 ----- Attempting Submission 2 (Wed Jul 22 18:55:31 GMT 2015) ----- Long-Lost Companions: A Search for the Binary Secondaries of Three Nearby Supernovae 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. WFC3: - Use entire array to aquire fiducial stars for alignment purposes - EXPTIME (actual): -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 HOT STARS 12 false true false false SUPPORTED EXT-STAR SUPERNOVA SUPERNOVA TYPE IB This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE IB This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 WFC3/UVIS Imaging No No F275W WFC3/UVIS Imaging No No F275W WFC3/UVIS Imaging No No F275W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 1

false

1437591247856 The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14075 :visit-id "01" :proposal-version -1 :trans-version "20150609" :date "22-Jul-2015 14:54:07.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14075 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14075 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2887 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14075 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 2 0 1437591255695 The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14075 :visit-id "02" :proposal-version -1 :trans-version "20150609" :date "22-Jul-2015 14:54:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14075 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14075 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2974 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14075 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3085 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14075 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3084 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14075 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3085 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) true 4 0 1437591263019 The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14075 :visit-id "03" :proposal-version -1 :trans-version "20150609" :date "22-Jul-2015 14:54:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1732464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14075 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14075 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2974 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14075 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3085 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14075 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3085 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) true 3 0