0 Assigned ID: 2163 ----- Attempting Submission 1 (Tue Apr 30 11:23:59 GMT 2013) ----- W2 visit altered such that it now containes a full orbit of F336W instead of a split in F336W and F160W. F160W data from the March observation of GRB130427A in proposal 13110 will be used instead. -1702544218 ----- Attempting Submission 1 (Fri May 03 13:12:38 GMT 2013) ----- HST Phase II Proposal 13230 (13230.apt) successfully submitted. ----- Attempting Submission 2 (Fri May 03 19:34:52 GMT 2013) ----- ----- Attempting Submission 3 (Fri May 03 20:30:57 GMT 2013) ----- ----- Attempting Submission 4 (Fri May 10 19:06:58 GMT 2013) ----- ----- Attempting Submission 5 (Mon Mar 24 21:10:53 GMT 2014) ----- A supernova in the brightest gamma-ray burst While the connection between long duration gamma-ray bursts and stripped envelope type Ic supernovae is relatively well established, the strong spectroscopic evidence on which it rests comes primarily from a handful of low-energy GRB/SNe. These are far from typical of the GRB population, and have been suggested to arise from rather different physical processes (such as shock breakout) than the bulk of the GRB population. Opportunities to study supernovae in much brighter bursts are hindered by the typical high redshift for the more luminous bursts, and the presence of bright afterglows from which the supernove must be separated. The very recent discovery of the brightest burst yet observed in 8 years of Swift observations -- GRB 130427A -- provides a unique opportunity to perform these studies on a burst of great astrophysical and public interest. The proximity of the burst (z=0.34) means that supernova studies are plausible, and here we propose to use HST to cleanly separate the afterglow, host galaxy and supernova components via UV and IR photometric observations, coupled with a optical grism spectrum. By isolating the supernova light from the afterglow, and using the unparalleled PSF of ACS to separate the host, we will uniquely identify the type and luminosity of the supernovae to a degree that will not be possible from the ground. In turn this will test if the supernovae in high-energy GRBs match those in their low energy cousisns, or if differing properties of the progenitor star can impact both GRB and supernova. We plan to obtain two epochs of observations of GRB 130427A with WFC3 (UVIS and IR) and ACS (F606W and G800L). The aim of these observations is to follow the afterglow decay in the UV and IR and search for a supernova in the optical. For UVIS and IR channels on WFC3 we will conduct the observations with a three point dither obtaining both in a single orbit. For ACS we will use a 4-point dither (plus through image in F606W) to obtain the data. We ask for the first two visits to be scheduled as close in time as possible (+/- 24 hours) to enable simultaneous data so the afterglow can be subtracted accurately. HOT STARS Default false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY J2000 ACS/WFC Imaging No No F606W ACS/WFC Spectroscopic No No G800L ACS/WFC Imaging No No F606W ACS/WFC Spectroscopic No No G800L WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F336W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F336W POS-TARG DITHER 0.605 LINE false false 3 41.788 WFC3-IR-DITHER-LINE-3PT 1 false POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 2 false POS-TARG DITHER 0.265 LINE 0.187 false false 69.05 4 20.67 ACS-WFC-DITHER-BOX 3 false POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 4 false The scheduling data was generated by CASM 22.0. CASM was run in Phase II mode. /Users/hounsell/Desktop/OP-cache/13230_new-vW1.xml 1369016628000 136.0 (Tic-Visit :proposal-id 13230 :visit-id "W1" :proposal-version -1 :trans-version "20131031" :date "24-Mar-2014 12:10:28.0" :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 1545200 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13230 :visit-id "W1" :obset-id "W1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13230 :visit-id "W1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2908 :al-overhead-at-end 0 :internal-dur-at-end 519 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([W2 After A1 by 300.0 to 400.0 days]) The scheduling data was generated by CASM 22.0. CASM was run in Phase II mode. /Users/hounsell/Desktop/OP-cache/13230_new-vW2.xml (Tic-Visit :proposal-id 13230 :visit-id "W2" :proposal-version -1 :trans-version "20131031" :date "24-Mar-2014 11:19:59.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13230 :visit-id "W2" :obset-id "W2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13230 :visit-id "W2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2918 :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 3253 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([A2 After A1 by 300.0 to 400.0 days] [W2 After A1 by 300.0 to 400.0 days]) The scheduling data was generated by CASM 22.0. CASM was run in Phase II mode. /Users/hounsell/Desktop/OP-cache/13230_new-vA1.xml 1369039592000 136.0 (Tic-Visit :proposal-id 13230 :visit-id "A1" :proposal-version -1 :trans-version "20131031" :date "24-Mar-2014 12:10:29.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1421120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13230 :visit-id "A1" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13230 :visit-id "A1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2918 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([A2 After A1 by 300.0 to 400.0 days]) The scheduling data was generated by CASM 22.0. CASM was run in Phase II mode. /Users/hounsell/Desktop/OP-cache/13230_new-vA2.xml (Tic-Visit :proposal-id 13230 :visit-id "A2" :proposal-version -1 :trans-version "20131031" :date "24-Mar-2014 12:10:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1421120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13230 :visit-id "A2" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13230 :visit-id "A2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2918 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) true 1 0