Phase II has been changed for migration of ACS/HRC observations to ACS/WFC and WF3 1. Visits 1-5 have been changed to ACS/WFC, Visit 6 is now with WF3 2. In order to regain HRC level spatial resolution, a 4-point box dither pattern has been adopted for all observations (please confirm that this will be realised with the adopted patterns) 3. Windowing has been employed for all visits - for WFC we are aiming to use the 1k aperture (50"), for WF3 we shall use a 512px aperture (20") 07-22-09 - Visit 6 changed so the exposures for each filter are in separate patterns ----- Attempting Submission 1 (Thu Jul 03 10:38:19 GMT 2008) ----- ----- Attempting Submission 2 (Mon Jun 29 14:01:18 GMT 2009) ----- Submission failed due to an error: java.lang.NullPointerException ----- Attempting Submission 4 (Wed Jul 22 08:19:30 GMT 2009) ----- Assigned ID: 669 ----- Attempting Submission 1 (Fri Mar 07 22:32:05 GMT 2008) ----- Phase I Proposal 669 (maund_cy17.apt) successfully submitted. Stellar Forensics: A post-explosion view of the progenitors of core-collapse supernovae Recent studies have used high spatial resolution HST observations of SN sites to identify the progenitors of core-collapse SNe on pre-explosion images. These studies have set constraints about the nature of massive stars and their evolution just prior to their explosion as SNe. Now, at late-times when the SNe have faded sufficiently, it is possible to return to the sites of these core-collapse SNe to search for clues about the nature of their progenitors. We request time to conduct deep, late-time, high-resolution imaging with ACS/HRC of the sites of six core-collapse SNe. In this program we aim to: 1) confirm our identifications, that were made with HST pre-explosion images, of the red supergiant progenitors of four Type IIP SNe (1999ev, 2003gd, 2004A and 2005cs), by observing if the objects identified as the progenitors are now missing; 2) place precise constraints on the progenitor of the Type Ic SN 2007gr by studying its host cluster; and 3) confirm our identification of an LBV-like outburst of an unstable WR star as belonging to the progenitor of a Type Ib-n core-collapse SN (2006jc), using broad and narrow-band imaging to search for emission line stars in its locality. The deep imaging will also allow to probe the stellar populations in the immediate vicinities of these SNe, that were previously obscured by the progenitors and the bright SNe. HST provides the unique combination of high-resolution optical imaging at very faint magnitudes that will facilitate this study.
This phase II proposal outlines observations of 6 separate old SNe (with 1 visit per object). In total 11 orbits have been allocated to this program, with different observing criteria for particular objects. The principal aim of the observations is to acquire deep, high-resolution imaging at the sites of these SNe with the ACS/HRC. Due to nearby bright objects we also have to use both CR-SPLITS and dither patterns to provide a larger photometric range and to aid removal of cosmic rays and hot pixels. We require three-color broad-band imaging to constrain SEDs and reddening (there are some deviations to this pattern, depending on the object - see below). Importantly, in some cases the target SN may not be present - and this is OK (since we want limits on both the SN and the progenitor brightness, along with any nearby objects). For Visits (objects) 1-4 (2 orbits ea.), due to relative old age of these objects, we aim to reach B~27, V~27 and I~26.5 at the faint limit. To reach these limits we have determined exposure times of: B~1740s, V~1500s, I~1950s (although due to different orbit properties, there's ~60s fluctuation around these values dependent on the object) For the three filter observations we employ both CRSPLITS and a dither pattern to remove hot pixels (and to accommodate nearby brighter objects – avoiding saturation and bleeding onto the area of interest). For each of the three filters there are 4 short exposures (2 pairs of CRSPLITs): CRSPLIT1 CRSPLIT2 DITHER CRSPLIT1 CRSPLIT2 DITHER In total, over the course of the whole observation the location of the target area will shift by only 8 pixels due to the dither pattern. For Visit 5 (2 orbits), we are searching for quiescent LBVs - the broad band faintness limits are relaxed (this time using B,V,R to a limit of 26mag) requiring less time (B=1230s,V=1030,R=1000). We will use a complementary long observation in HALPHA (to search for emission line objects) with exposure time 2220s (to reach a flux 1e-19ergs/cm-2/s-1/A-1). We wish to take the difference between the HALPHA and R-band images to search for emission line objects (which the dither pattern won't affect). Due to the small lengths of these individual exposures we are not using CR-SPLITS, rather there will be 2 exposures per filter with a dither offset between the 2 to correct for both cosmic rays and hot pixels. EXPOSURE1 DITHER EXPOSURE2 DITHER For Visit 6 (1 orbit) we are acquiring three color imaging of a cluster (in U,V and R) to measure it's SED (cluster mv~22). For likely cluster colors, we only need 1 orbit to go down to ~24 mag (i.e. to measure the SED to good S/N and search for any nearby flux contribution). Exposure times to hit this limit are U=1500, V=480, R=480. Again, due to length of time for each broad-band filter we will use the dither pattern alone - with 2 exposures at different pointings per filter. EXPOSURE1 DITHER EXPOSURE2 DITHER There is 1 scheduling constraint for Visit 6 - which should occur in the second half of Cycle 17 (after May 1st 2009), since the SN will have only faded to acceptable limits in that time. There are no scheduling constraints for Visits 1-5. HOT STARS 12 false 0.0 0.0 false false false false false SUPPORTED EXT-STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the NED database. J2000 12 19 48.3000 +29 37 22.00 J2000 EXT-STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the NED database. J2000 01 36 42.6000 +15 44 20.00 J2000 EXT-STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the NED database. J2000 16 43 1.9000 +36 50 13.00 J2000 EXT-STAR SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the NED database. J2000 13 29 53.4000 +47 10 28.00 J2000 EXT-STAR SUPERNOVA TYPE IB This object was generated by the targetselector and retrieved from the NED database. J2000 09 17 20.8000 +41 54 33.00 J2000 EXT-STAR SUPERNOVA TYPE IB This object was generated by the targetselector and retrieved from the NED database. J2000 02 43 28.0000 +37 20 45.00 J2000 ACS/HRC Imaging No No F435W ACS/HRC Imaging No No F555W ACS/HRC Imaging No No F814W ACS/HRC Imaging No No F435W ACS/HRC Imaging No No F555W ACS/HRC Imaging No No F814W ACS/HRC Imaging No No F435W ACS/HRC Imaging No No F555W ACS/HRC Imaging No No F814W ACS/HRC Imaging No No F435W ACS/HRC Imaging No No F555W ACS/HRC Imaging No No F814W ACS/HRC Imaging No No F435W ACS/HRC Imaging No No F555W ACS/HRC Imaging No No F625W ACS/HRC Imaging No No F658N ACS/HRC Imaging No No F330W ACS/HRC Imaging No No F555W ACS/HRC Imaging No No F625W POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 3 false POS-TARG DITHER 0.265 LINE 0.187 false false 69.05 4 20.67 ACS-WFC-DITHER-BOX 4 false The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/justyn/Documents/text/proposals/hst_cycle17_phaseii/OP-cache/phaseII_updated_210709-v01.xml VISIT FOR TYPE IIP SN1999EV (Tic-Visit :proposal-id 11675 :visit-id "01" :proposal-version -1 :trans-version "20090130" :date "22-Jul-2009 10:13:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 213328 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11675 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11675 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2929 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11675 :visit-id "01" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3069 :al-overhead-at-end 0 :internal-dur-at-end 272 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/justyn/Documents/text/proposals/hst_cycle17_phaseii/OP-cache/phaseII_updated_210709-v02.xml VISIT FOR TYPE IIP SN2003GD (Tic-Visit :proposal-id 11675 :visit-id "02" :proposal-version -1 :trans-version "20090130" :date "22-Jul-2009 10:14:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 213328 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11675 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11675 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2919 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11675 :visit-id "02" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3057 :al-overhead-at-end 0 :internal-dur-at-end 272 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/justyn/Documents/text/proposals/hst_cycle17_phaseii/OP-cache/phaseII_updated_210709-v03.xml VISIT FOR TYPE IIP SN2004A (Tic-Visit :proposal-id 11675 :visit-id "03" :proposal-version -1 :trans-version "20090130" :date "22-Jul-2009 10:14:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 213328 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11675 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11675 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2973 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3310 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11675 :visit-id "03" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3111 :al-overhead-at-end 0 :internal-dur-at-end 272 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3310 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/justyn/Documents/text/proposals/hst_cycle17_phaseii/OP-cache/phaseII_updated_210709-v04.xml VISIT FOR TYPE IIP SN2005CS (Tic-Visit :proposal-id 11675 :visit-id "04" :proposal-version -1 :trans-version "20090130" :date "22-Jul-2009 10:14:07.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 213328 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11675 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11675 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3063 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3398 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11675 :visit-id "04" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3201 :al-overhead-at-end 0 :internal-dur-at-end 272 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3398 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/justyn/Documents/text/proposals/hst_cycle17_phaseii/OP-cache/phaseII_updated_210709-v05.xml VISIT FOR TYPE IB SN2006JC (Tic-Visit :proposal-id 11675 :visit-id "05" :proposal-version -1 :trans-version "20090130" :date "22-Jul-2009 10:14:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 284432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11675 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11675 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11675 :visit-id "05" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3155 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /private/tmp/OPVisit54272.xml VISIT FOR TYPE IC SN2007GR (Tic-Visit :proposal-id 11675 :visit-id "06" :proposal-version -1 :trans-version "20090130" :date "22-Jul-2009 10:18:38.0" :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 54928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11675 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11675 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2974 :al-overhead-at-end 40 :internal-dur-at-end 99 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3310 :pcs-gap 0 ) true 1 0