Science Keywords: Select from 2 to 5 items. Science Keywords is a required field. Spectral Element 1 is a required field. Spectral Element 1 is a required field. Spectral Element 1 is a required field. Spectral Element 1 is a required field. 0 Assigned ID: 2554 ----- Attempting Submission 1 (Wed Sep 15 12:14:59 GMT 2021) ----- Joint Chandra/HST This pattern is not used in this proposal. The phase 1 proposal for this program uses the target of opportunity requirement, but this program has not specified the TARGET OF OPPORTUNITY RESPONSE TIME special requirement. Please add this special requirement to each target of opportunity visit. This is for a reobservation of a ToO target first observed last February. We can reobserve the target with a change in orientation of 180 degrees in late August and early September. This will allow excellent overlap of the fields of the two epochs. This in turn should enable very accurate astrometric alignment of the epochs, which is crucial for accurate subtraction of the second epoch from the first. 312769889 ----- Attempting Submission 1 (Sat Oct 16 23:07:28 GMT 2021) ----- ----- Attempting Submission 2 (Wed Jan 19 04:02:31 GMT 2022) ----- HST Phase II Proposal 16838 successfully submitted. Receipt: # 16838-2 ----- Attempting Submission 3 (Wed Jan 19 04:18:21 GMT 2022) ----- HST Phase II Proposal 16838 successfully submitted. Receipt: # 16838-3 ----- Attempting Submission 4 (Wed Jul 27 20:23:12 GMT 2022) ----- We used this pattern in a draft. As we are planning a ToO program where plans may change we left it in. The Astrophysics of the Most Energetic Gamma-Ray Bursts The Fermi Large Area Telescope (LAT) 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, bulk Lorentz factor, and probe the jet physics of the explosion. Recent work on some of the most powerful GRBs has begun to substantially constrain physical models of the central engine. Our observations may greatly strengthen these constraints as well as provide new insight into the relativistic physics of the bursts. We expect to perform two or three visits with HST on the target GRB. Our default plan is to use both F606W and F160W though the choice of bands will depend on the redshift of the burst and the likelihood of the underlying SN affecting our photometry as well as on the filters used in ground-based follow-up. We will dither to insure good subpixel phase coverage and to reduce issues with bad pixels. n/a Stellar Physics and Stellar Types 6 false false false false false false false SUPPORTED EXT-STAR GAMMA RAY BURSTER NO J2000 EXT-STAR GAMMA RAY BURSTER Triggered for observation by Chandra WFC3/UVIS Imaging No No 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 2 false POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 3 false POS-TARG DITHER 0.605 LINE false false 3 41.788 WFC3-IR-DITHER-LINE-3PT 4 false POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 5 false POS-TARG DITHER DITHER 4 23.02 WFC3-IR-DITHER-BOX-MIN 35.212 false 74.653 true 0.365 89.287 0.572 4 0.713 POS-TARG WFC3-IR-DITHER-BOX-UVIS 18.528 6 false POS-TARG DITHER DITHER 4 .0725 8 pt dither, with 2 PT offset of 1.25 pixels WFC3-UVIS-DITHER-BOX false 81.785 false 0.112 0.173 2 46.84 POS-TARG LINE 23.884 7 true The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/APT/16838/OP-cache/16838_220726-v01.xml (Tic-Visit :proposal-id 16838 :visit-id "01" :proposal-version -1 :trans-version "20210514" :date "18-Jan-2022 23:01:31.0" :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 1152000 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16838 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "01" :orbit-number 1 :pcs-time 383 :si-vis-utilization 1657 :al-overhead-at-end 123 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 1 0 ToO The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/APT/16838/OP-cache/16838_220726-v02.xml (Tic-Visit :proposal-id 16838 :visit-id "02" :proposal-version -1 :trans-version "20210514" :date "18-Jan-2022 23:01:32.0" :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 2060256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16838 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "02" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2624 :al-overhead-at-end 0 :internal-dur-at-end 65 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16838 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2592 :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 3142 :pcs-gap 0 ) true 2 0 ToO The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/APT/16838/OP-cache/16838_220726-v03.xml (Tic-Visit :proposal-id 16838 :visit-id "03" :proposal-version -1 :trans-version "20210514" :date "18-Jan-2022 23:01:33.0" :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 2060256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16838 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "03" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2683 :al-overhead-at-end 0 :internal-dur-at-end 65 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16838 :visit-id "03" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2592 :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 3142 :pcs-gap 0 ) true 2 0 ToO The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. /Users/fruchter/Dropbox/Props/HST/APT/16838/OP-cache/16838_220726-v04.xml (Tic-Visit :proposal-id 16838 :visit-id "04" :proposal-version -1 :trans-version "20210514" :date "17-Jan-2022 23:26:31.0" :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 2060256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16838 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "04" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2683 :al-overhead-at-end 0 :internal-dur-at-end 65 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16838 :visit-id "04" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2592 :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 3142 :pcs-gap 0 ) true 2 0 ToO /private/var/folders/ng/2sm1ngs92xq58ld7mbzqnfhh0000gp/T/OPVisit7221678426137558247.xml Timing link suitability includes constraints ([Group (A1 A2) Within 2.0 days] [A2 After A1 by at most 2.0 days]) The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1644205514000 45.96205975857751 (Tic-Visit :proposal-id 16838 :visit-id "A1" :proposal-version -1 :trans-version "20220516" :date "27-Jul-2022 14:45:08.0" :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 16838 :visit-id "A1" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "A1" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2727 :al-overhead-at-end 121 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 /Users/fruchter/Dropbox/Props/HST/APT/16838/OP-cache/16838_220726-vA2.xml Timing link suitability includes constraints ([Group (A1 A2) Within 2.0 days] [A2 After A1 by at most 2.0 days]) The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1644211230000 45.93166740280989 (Tic-Visit :proposal-id 16838 :visit-id "A2" :proposal-version -1 :trans-version "20210514" :date "16-Jan-2022 18:56:04.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 905248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16838 :visit-id "A2" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "A2" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2624 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 /private/var/folders/ng/2sm1ngs92xq58ld7mbzqnfhh0000gp/T/OPVisit17620641029122190131.xml The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16838 :visit-id "A4" :proposal-version -1 :trans-version "20220516" :date "27-Jul-2022 14:44:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 905248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16838 :visit-id "A4" :obset-id "A4" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "A4" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2624 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0 /private/var/folders/ng/2sm1ngs92xq58ld7mbzqnfhh0000gp/T/OPVisit11868144466282058586.xml The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16838 :visit-id "A3" :proposal-version -1 :trans-version "20220516" :date "27-Jul-2022 14:44:23.0" :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 16838 :visit-id "A3" :obset-id "A3" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16838 :visit-id "A3" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2607 :al-overhead-at-end 121 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0