0 Assigned ID: 399 ----- Attempting Submission 1 (Fri Apr 07 04:46:55 GMT 2017) ----- HST Phase I Proposal 399 (snprog.apt) successfully submitted. Receipt: # 399-1 ----- Attempting Submission 2 (Fri Apr 07 13:11:42 GMT 2017) ----- HST Phase I Proposal 399 (snprog.apt) successfully submitted. Receipt: # 399-2 ORBITAL VISIBILITY OVERRUN 0 ----- Attempting Submission 1 (Thu Jul 20 17:52:19 GMT 2017) ----- ----- Attempting Submission 2 (Mon Apr 09 23:08:09 GMT 2018) ----- ----- Attempting Submission 3 (Mon Apr 29 22:44:44 GMT 2019) ----- ----- Attempting Submission 4 (Mon May 13 23:10:51 GMT 2019) ----- ----- Attempting Submission 5 (Wed Oct 09 17:08:01 GMT 2019) ----- ----- Attempting Submission 6 (Mon Dec 02 18:35:09 GMT 2019) ----- Ignoring orbital overrun error on withdrawn Visit 8. Supernovae (SNe) have a profound effect on galaxies and have been used as precise cosmological probes, resulting in the Nobel-distinguished discovery of the accelerating Universe. They are clearly very important events deserving of intense study. Yet, even with over 10000 classified SNe, we know relatively little about the stars which give rise to these powerful explosions. The main limitation has been the lack of spatial resolution in pre-SN imaging data. However, since 1999 our team has been at the vanguard of directly identifying SN progenitor stars in HST images. From this exciting line of study, the trends from 15 detections for Type II-Plateau SNe appear to be red supergiant progenitors of relatively low mass (8 to 17 Msun) -- although this upper mass limit still requires testing -- and warmer, envelope-stripped supergiant progenitors for 5 Type IIb SNe. Additionally, evidence is accumulating that some Type II-narrow SNe may arise from exploding stars in a luminous blue variable phase. However, the nature of the progenitors of Type Ib/c SNe, a subset of which are associated with gamma-ray bursts, still remains ambiguous. Furthermore, we continue in the embarrassing situation that we still do not yet know which progenitor systems explode as Type Ia SNe, which are being used for precision cosmology. In Cycles 16, 17, and 20 through 24 we have had great success with our approved ToO programs. As of this proposal deadline, we have already triggered on SN 2016jbu with our Cycle 24 program. We therefore propose to continue this project in Cycles 25 and 26, to determine the identities of the progenitors of 8 SNe within about 20 Mpc through ToO observations using WFC3/UVIS. We plan for eight (8) ToO triggers ***to be spread throughout both Cycles 25 and 26***. If we detect one or more candidate stellar objects within a 1-sigma positional uncertainty in ACS, WFPC2, or WFC3 pre-supernova archival image(s), we will request a trigger to pinpoint the location of the SN in the pre-SN images and attempt to confirm the progenitor candidate. Our plan is to image with WFC3/UVIS, to provide the highest possible spatial resolution. Our strategy, generally, is to acquire several short-exposure dithered images in V (F555W, 10-s) or I (F814W, 30-s), for the 6 core-collapse visits (which will likely best match with the available archival image data), and in U (F336W, 20-s) or B (F438W, 20-s) for the two nearby (<10 Mpc) SN Ia visits, since these SNe will likely be too bright in redder bands, but fade more rapidly in the blue. How the visits inevitably get used depends on what nearby SNe Nature provides us. We will be using the UVIS2 1Kx1K subarray near amplifier C. Since the exposures are quite short, we will also be using post-flash with 12 e- for each exposure, in order to mitigate against CTE losses. The initial Phase II observations are meant to be representative of a typical trigger. Each of the 8 possible ToOs has an initial placeholder position of RA(J2000)=0, Dec(J2000)=0. We will likely request triggers when the SN is still fairly bright, depending on its age at discovery, but limit this, generally, to m >14 mag. We therefore may alter exposure times and bands, depending on the expected brightness of a given SN when it is scheduled and depending on the bands of the pre-SN images available for the SN site in the HST archive. This could also result in changes in the dither strategy for a given visit. The ToOs are not intended to be high-impact, and will be requested to occur after 2 to 3 weeks from discovery, so there should be no disruption of normal scheduling. Stellar Physics Stellar Populations 0 false false false false false false false SUPPORTED EXT-STAR SUPERNOVA SUPERNOVA TYPE II J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE II J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE IB J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE IA J2000 J2000 EXT-STAR ETA CARINAE STAR LUMINOUS BLUE VARIABLE J2000 J2000 EXT-STAR ETA CARINAE STAR LUMINOUS BLUE VARIABLE J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE IB J2000 J2000 EXT-STAR SUPERNOVA SUPERNOVA TYPE IA J2000 J2000 WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F438W WFC3/UVIS Imaging No No F438W POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 1 false 1575310387784 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit7533007986797141323.xml 1524498981000 146.89999999999998 (Tic-Visit :proposal-id 15151 :visit-id "01" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 481264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2800 :al-overhead-at-end 83 :internal-dur-at-end 562 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 1575310389696 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit6453579340346642828.xml 1557965582000 195.01967581672113 (Tic-Visit :proposal-id 15151 :visit-id "02" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 106960 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3166 :al-overhead-at-end 77 :internal-dur-at-end 153 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3519 :pcs-gap 0 ) true 1 0 1575310391077 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit11264384999778359412.xml 1558230415000 42.62881816597999 (Tic-Visit :proposal-id 15151 :visit-id "03" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 106960 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3160 :al-overhead-at-end 77 :internal-dur-at-end 153 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3519 :pcs-gap 0 ) true 1 0 1575310393976 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit9635162388641384387.xml 1561950346000 243.45630544315532 (Tic-Visit :proposal-id 15151 :visit-id "04" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 213904 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2766 :al-overhead-at-end 83 :internal-dur-at-end 270 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 1 0 1575310290390 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /Users/vandyk/Documents/proposals/hst/cycle25/OP-cache/15151_visit5_redo-v05.xml (Tic-Visit :proposal-id 15151 :visit-id "05" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:11:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 409968 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2832 :al-overhead-at-end 83 :internal-dur-at-end 484 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 1575310424744 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit14203548956409723641.xml 1573133430000 69.43249401352 (Tic-Visit :proposal-id 15151 :visit-id "06" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 481264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2817 :al-overhead-at-end 83 :internal-dur-at-end 562 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 1 0 1575310431357 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit17164249629850745447.xml (Tic-Visit :proposal-id 15151 :visit-id "07" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 481264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2800 :al-overhead-at-end 83 :internal-dur-at-end 562 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 1 0 Pending ToO activation. 1575310437148 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. /private/var/folders/6g/xnmzjq6x4gqg_99lmrhmn4pm0000gq/T/OPVisit116813615800343553.xml (Tic-Visit :proposal-id 15151 :visit-id "08" :proposal-version -1 :trans-version "20190514" :date "02-Dec-2019 10:13:55.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 445616 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15151 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15151 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2836 :al-overhead-at-end 83 :internal-dur-at-end 523 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 1 1 Pending ToO activation.