The Astrophysics of the Most Energetic Gamma-Ray Bursts

Be very careful mixing POS TARG and Center_Pattern = Yes ORBITAL VISIBILITY OVERRUN Be very careful mixing POS TARG and Center_Pattern = Yes ORBITAL VISIBILITY OVERRUN Be very careful mixing POS TARG and Center_Pattern = Yes Be very careful mixing POS TARG and Center_Pattern = Yes 0 ----- Attempting Submission 3 (Wed Dec 04 19:27:15 GMT 2013) ----- ----- Attempting Submission 9 (Thu Nov 13 17:08:44 GMT 2014) ----- HST Phase II Proposal 13110 (13110New.apt) successfully submitted. ----- Attempting Submission 10 (Wed Nov 19 16:42:53 GMT 2014) ----- We are happy with the POS TARG and have used this before. 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, HST and the EVLA to follow the late time light curve of a LAT detected burst that also has excellent early multi-wavelength 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. 12 false false 0.0 0.0 false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY J2000 WFC3/UVIS Imaging No No WFC3/UVIS Imaging No No WFC3/UVIS Imaging No No POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 4

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POS-TARG DITHER DITHER 2 5.183 WFC3-IR-DITHER-LINE false true 0.636 2 41.859 POS-TARG WFC3-IR-DITHER-BLOB 41.788 8

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POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 9

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The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. 1415728586698 1373428950000 99.8984327102487 (Tic-Visit :proposal-id 13110 :visit-id "01" :proposal-version -1 :trans-version "20140605" :date "11-Nov-2014 12:56:26.0" :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 1632256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13110 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13110 :visit-id "01" :orbit-number 1 :pcs-time 241 :si-vis-utilization 2675 :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 2999 :pcs-gap 0 ) true 1 0 1415728588473 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. 1389498120000 256.9235957794499 (Tic-Visit :proposal-id 13110 :visit-id "02" :proposal-version -1 :trans-version "20140605" :date "11-Nov-2014 12:56:27.0" :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 1632256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13110 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13110 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2675 :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 2999 :pcs-gap 0 ) true 1 1 1415728590284 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. 1394335054000 189.93624609552887 (Tic-Visit :proposal-id 13110 :visit-id "03" :proposal-version -1 :trans-version "20140605" :date "11-Nov-2014 12:56:29.0" :trans-errors '(:WARNINGS 1 :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 2129904 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13110 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13110 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2680 :al-overhead-at-end 116 :internal-dur-at-end 31 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2999 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13110 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 291 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2999 :pcs-gap 0 ) true 2 1 1416415331274 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13110 :visit-id "04" :proposal-version -1 :trans-version "20140605" :date "19-Nov-2014 11:42:11.0" :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 3518416 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13110 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13110 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2646 :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 2999 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13110 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2776 :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 2999 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13110 :visit-id "04" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2775 :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 2999 :pcs-gap 0 ) false 3 0