Revealing the Explosion Geometry of Nearby GRB-SNe

Revealing the Explosion Geometry of Nearby GRB-SNe The connection between gamma-ray bursts and Type Ibc supernovae is well-established in broad terms. However, our recent identification of an intermediate class of sub-energetic GRBs, and the overall overlap in Nickel production between GRB-SNe and ordinary SNe Ibc suggest that the properties leading to the production of a relativistic engine are yet to be uncovered. A fundamental difference between the two classes of explosions may be imprinted in the overall geometry of the explosion. The relativistic component of GRBs is known to be highly collimated, but it is unclear if the SN blast is spherical or mildly collimated as well. Here we propose HST observations of the late (>30 days) decay tails of two GRB-SNe as an independent measure of the Nickel mass synthesized in the explosion. A comparison to the Nickel mass inferred from the peak brightness of the SNe will provide a direct measure of the explosion asymmetry, since at late time the explosion is essentially spherical. These observations will form the core of a multi-wavelength (optical, X-ray, radio) effort to fully characterize all aspects of the explosions, from the energy and geometry of the relativistic material (VLA, Chandra) to the early SN evolution (Keck, Magellan). The proposed observations require two slow-response (>30 days) TOOs, ideally suited to the 2-gyro operations of HST.

We will undertake HST/WFPC2 observations of the late-time (t=40-200 days) decay tails of two nearby (z<0.3) GRB-SNe as an independent measue of the Nickel mass synthesized in the explosion. We plan to visit the GRB-SNe at five epochs. The first four will be linearly spaced, taking place at roughly 40, 90, 140, and 200 days post-burst while the final epoch will take place at about 300 days to ensure a SN-free template image for host galaxy subtraction. All observations will be done with the F606W filter. The required orbits for each GRB-SN target are as follows: epoch 1 (1 orbit), epoch 2 (1 orbit), epoch 3 (2 orbits), epoch 4 (3 orbits), epoch 5 (3 orbits). This program is carried out as a slow-response ToO with 2 activations (one per GRB-SN) where each activation is accompanied by 4 follow-up observations. COSMOLOGY 12 false 0.0 0 false false false false false SUPPORTED EXT-STAR SUPERNOVA TYPE IB J2000 00 00 0.0000 +00 00 0.00 J2000 EXT-STAR GAMMA RAY BURSTER GRB-SN at z<0.3 EXT-STAR GAMMA RAY BURSTER GRB-SN at z<0.3 WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W WFPC2 Imaging No F606W POS-TARG DITHER 0.3535 LINE false false 2 45.0 WFPC2-LINE 1

false

The is the first epoch for GRB-SN 1 (Tic-Visit :proposal-id 11161 :visit-id "01" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 14:34:47.0" :trans-errors '(:WARNINGS 3 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 134448 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 1 0 The is the second epoch for GRB-SN 1 (Tic-Visit :proposal-id 11161 :visit-id "02" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:01.0" :trans-errors '(:WARNINGS 3 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 134448 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 1 0 The is the third epoch for GRB-SN 1 (Tic-Visit :proposal-id 11161 :visit-id "03" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:06.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "03" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2722 :al-overhead-at-end 158 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "03" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 2 0 The is the fourth epoch for GRB-SN 1 (Tic-Visit :proposal-id 11161 :visit-id "04" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:14.0" :trans-errors '(:WARNINGS 9 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 403344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "04" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2722 :al-overhead-at-end 158 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "04" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2721 :al-overhead-at-end 159 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "04" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 3 0 The is the fourth epoch for GRB-SN 1 (Tic-Visit :proposal-id 11161 :visit-id "05" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:21.0" :trans-errors '(:WARNINGS 9 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 403344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "05" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2722 :al-overhead-at-end 158 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "05" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2721 :al-overhead-at-end 159 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "05" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 3 0 The is the first epoch for GRB-SN 2 (Tic-Visit :proposal-id 11161 :visit-id "06" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:25.0" :trans-errors '(:WARNINGS 3 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 134448 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "06" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 1 0 The is the second epoch for GRB-SN 2 (Tic-Visit :proposal-id 11161 :visit-id "07" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:28.0" :trans-errors '(:WARNINGS 3 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 134448 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "07" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 1 0 The is the third epoch for GRB-SN 2 (Tic-Visit :proposal-id 11161 :visit-id "08" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:31.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "08" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2722 :al-overhead-at-end 158 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "08" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 2 0 The is the fourth epoch for GRB-SN 2 (Tic-Visit :proposal-id 11161 :visit-id "09" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:38.0" :trans-errors '(:WARNINGS 9 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 403344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "09" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2722 :al-overhead-at-end 158 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "09" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2721 :al-overhead-at-end 159 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "09" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 3 0 The is the fourth epoch for GRB-SN 2 (Tic-Visit :proposal-id 11161 :visit-id "10" :proposal-version -1 :trans-version "20061210" :date "09-May-2007 15:26:44.0" :trans-errors '(:WARNINGS 9 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 403344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "10" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2722 :al-overhead-at-end 158 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "10" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2721 :al-overhead-at-end 159 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "10" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 3 0 Timing link suitability includes constraints ([12 After 11 by 10.0 to 120.0 days]) The scheduling data was generated by CASM 16.2. CASM was run in Phase II mode. This is the first visit of the first epoch (1 orbit) for SN2008D 1202557244000 146.90371967450602 (Tic-Visit :proposal-id 11161 :visit-id "11" :proposal-version -1 :trans-version "20071214" :date "22-Jan-2008 08:02:31.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 717056 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "11" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2780 :al-overhead-at-end 100 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "11" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2760 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) false 2 0 Timing link suitability includes constraints ([12 After 11 by 10.0 to 120.0 days]) The scheduling data was generated by CASM 16.2. CASM was run in Phase II mode. This is the second epoch , first visit (1 orbit) for SN2008D 1206873114000 136.0 (Tic-Visit :proposal-id 11161 :visit-id "12" :proposal-version -1 :trans-version "20070709" :date "21-Jan-2008 14:48:26.0" :trans-errors '(:WARNINGS 2 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "12" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "12" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 16.2. CASM was run in Phase II mode. This is the fourth epoch , first visit (3 orbits) for SN2008D (Tic-Visit :proposal-id 11161 :visit-id "14" :proposal-version -1 :trans-version "20070709" :date "21-Jan-2008 12:31:28.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "14" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "14" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2721 :al-overhead-at-end 159 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "14" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) false 3 0 The scheduling data was generated by CASM 16.2. CASM was run in Phase II mode. This is the fifth epoch , first visit (3 orbits) for SN2008D (Tic-Visit :proposal-id 11161 :visit-id "15" :proposal-version -1 :trans-version "20070709" :date "21-Jan-2008 12:31:34.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11161 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11161 :visit-id "15" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "15" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2721 :al-overhead-at-end 159 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11161 :visit-id "15" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 3 0