Next visit in series of observations of GRB 120711A. New active visit is Visit 06. 985948453 ----- Attempting Submission 2 (Mon Aug 06 22:00:36 GMT 2012) ----- ----- Attempting Submission 3 (Tue Jul 23 15:28:26 GMT 2013) ----- This is a ToO. The number of orbits in the Phase II does not indicate the number of active orbits. The Astrophysics of the Most Energetic Gamma-Ray Bursts The Large Area Telescope (LAT) of Fermi has found a sample of highly relativistic gamma-ray bursts (GRBs), which may be among the most energetic bursts ever discovered. Here we propose to use Chandra and HST to follow the late time X-ray and optical light curves of a LAT detected burst that also has excellent early multiwavelength coverage. Our observations, in conjunction with the Fermi data, will allow us to measure the energy and the bulk Lorentz factor of the explosion. Recent work on some of the most powerful GRBs begins to substantially constrain physical models of the progenitors. The energetics of the highly relativistic LAT bursts may greatly strengthen these constraints and provide new insight into the currently unknown mechanism that determines the energy in a GRB. We plan three visits with HST: the first an orbit long, a second two orbits long, and a third four orbits long. The first visit will occur about around twenty days after outburst. The second will be around forty days after outburst. The exact times will be scaled according to the decay seen from the ground. The third visit will be taken at least six months after the burst to allow an accurate host subtraction. We will use the UVIS camera on WFC3 because WFC3 easily has as good sensitivity on point sources as ACS with smaller detector-induced noise sources (CTE, bias-striping, etc). We will choose the filter at the time of the ToO to match one of the best observed bands from the ground (most likely a red band). If the OT and host are sufficiently bright in the first two epochs we will divide the last epoch into 3 orbits with WFC3/UVIS and one orbit with WFC3/IR, in order to better study the environment underlying this extremely energetic burst. HOT STARS 12 false false 0.0 0.0 false false false SUPPORTED EXT-STAR GAMMA RAY BURSTER J2000 J2000 EXT-STAR GAMMA RAY BURSTER J2000 WFC3/UVIS Imaging No No WFC3/UVIS Imaging No No WFC3/UVIS Imaging No No POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 1 false POS-TARG DITHER DITHER 2 0.173 WFC3-UVIS-DITHER-LINE 0.112 false false 81.785 0.145 4 23.884 POS-TARG BOX 46.84 2 true POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 3 false POS-TARG DITHER DITHER 2 .135 LINE false false .139 3 46.84 POS-TARG LINE 0.0 4 true The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/HST-Chandra/OP-cache/12749_visit3-v01.xml (Tic-Visit :proposal-id 12749 :visit-id "01" :proposal-version -1 :trans-version "20130502" :date "20-Jul-2013 16:27:32.0" :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 12749 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12749 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2872 :al-overhead-at-end 116 :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 This is a ToO The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/HST-Chandra/OP-cache/12749_visit3-v02.xml (Tic-Visit :proposal-id 12749 :visit-id "02" :proposal-version -1 :trans-version "20130502" :date "20-Jul-2013 16:27:36.0" :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 12749 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12749 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2736 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2736 :al-overhead-at-end 116 :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 2 0 This is a ToO The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/HST-Chandra/OP-cache/12749_visit3-v03.xml (Tic-Visit :proposal-id 12749 :visit-id "03" :proposal-version -1 :trans-version "20130502" :date "20-Jul-2013 16:27:39.0" :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 12749 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12749 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2736 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2736 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2736 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "03" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2736 :al-overhead-at-end 116 :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 4 0 This is a ToO The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/HST-Chandra/OP-cache/12749_visit3-v04.xml 1343686020000 213.0 (Tic-Visit :proposal-id 12749 :visit-id "04" :proposal-version -1 :trans-version "20130502" :date "20-Jul-2013 16:27:42.0" :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 12749 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12749 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2836 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2836 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/HST-Chandra/OP-cache/12749_visit3-v05.xml 1346492924000 244.82624093905747 (Tic-Visit :proposal-id 12749 :visit-id "05" :proposal-version -1 :trans-version "20130502" :date "20-Jul-2013 16:27:43.0" :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 12749 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12749 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2836 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2836 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) true 2 0 /private/var/folders/ng/2sm1ngs92xq58ld7mbzqnfhh0005wx/T/OPVisit5843769084946280058.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12749 :visit-id "06" :proposal-version -1 :trans-version "20130502" :date "23-Jul-2013 10:45:53.0" :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 12749 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12749 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2936 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2936 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12749 :visit-id "06" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2936 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3635 :pcs-gap 0 ) true 3 0