Please let me know if there is a problem viewing this proposal. - R. Fesen -1848774960 Assigned ID: 1016 ----- Attempting Submission 1 (Fri Apr 07 22:41:03 GMT 2017) ----- The number of orbits used exceeds the number allocated visit 04, HOPR repeat of visit 02...now listed as Visit 4 276511457 ----- Attempting Submission 1 (Sun Jul 09 18:04:05 GMT 2017) ----- ----- Attempting Submission 2 (Tue Jan 30 16:10:11 GMT 2018) ----- ----- Attempting Submission 3 (Tue Jan 30 17:42:20 GMT 2018) ----- I have run both the orbit abd visit Planner. I cannot edit (fix) the number of orbits from 9 to 12. An HST Survey of Cassiopeia A's Reverse Shock, High-Velocity Ejecta, and Shocked Clouds of Pre-SN Mass Loss The young Galactic supernova remnant Cassiopeia A (Cas A) provides us with the clearest look at the properties and explosion dynamics of a high mass, core-collapse supernova (CCSN). With an explosion date around 1670, Cas A is the youngest Galactic core-collapse SNR known and, at an estimated distance of 3.4 kpc, it is also among the closest. Cas A's main shell ejecta knots are typically 0.1 - 0.5 arcsec in size and can show emission and morphological changes on timescales of just a few months. No other remnant, with the exception of SN 1987A, shows such rapid optical changes across large portions of its structure. Here we propose a new, complete optical survey of Cas A, the first since 2004, in order to measure the velocity and asymmetry of Cas A's reverse shock front across the whole remnant and map the distribution of its high-velocity outer ejecta, particularly in regions which align to the motion of the central compact source. Halpha images of the remnant's shocked CSM clumps will also provide strong tests of shock-cloud models across a broad range of cloud densities and sizes. These data will constitute a rich and unique archive both for Cas A and the general study of high mass CCSNe. This program is to image the young supernova remnant, Cassiopeia A (Cas A) in three filters: F475W, F625W, and F658N. Nine separate pointings are need in order to cover the entire remnant images. Images in the three filters will be taken at each pointing during one CVZ orbit, totaling nine CVZ orbits. A second set of identical images will be taken roughly one year apart in Cycle 26. The second epoch images is required to discern ejecta knots from stars or distant galaxies via their high proper motions. Cas A lies at the very southern edge of the HST's Continous Viewing Zone (CVZ) and the use of the full 96 minute HST orbit and hence observing time allows for a much more compact and efficient observing program. Similar CVZ imageing programs of Cas A have been done in the past, despite the few days that Cas A is observable in Hubble's CVZ. Stellar Physics 6 false false false false false false SUPPORTED ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 ISM EJECTA EMISSION LINE NEBULA SHOCK FRONT SNR YES J2000 J2000 WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F657N POS-TARG MOSAIC DITHER 2 2.4 WFC3-UVIS-MOS-DITH-LINE false true 0.119 2 85.754 POS-TARG WFC3-UVIS-MOS-DITH-LINE 33.606 1 true Hst Same orient constraint links visits (01 02 03 04) The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1515415003000 42.0 (Tic-Visit :proposal-id 15337 :visit-id "01" :proposal-version -1 :trans-version "20171009" :date "30-Jan-2018 11:07:14.0" :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 6930032 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15337 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "01" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "01" :obset-id "B1" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15337 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 15988 :al-overhead-at-end 123 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) false 3 0 Hst Same orient constraint links visits (01 02 03 04) The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1515533292000 42.0 (Tic-Visit :proposal-id 15337 :visit-id "02" :proposal-version -1 :trans-version "20171009" :date "30-Jan-2018 11:07:20.0" :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 6930032 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15337 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "02" :obset-id "B2" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15337 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 15928 :al-overhead-at-end 123 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) false 3 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. /Users/robtfesen/Desktop/OP-cache/test_vist4-v04.xml copy of visit 2 - HOPR repeat (Tic-Visit :proposal-id 15337 :visit-id "04" :proposal-version -1 :trans-version "20171009" :date "30-Jan-2018 12:25:06.0" :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 6930032 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15337 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "04" :obset-id "A4" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15337 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 15494 :al-overhead-at-end 123 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 3 0 Hst Same orient constraint links visits (01 02 03 04) The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1515831303000 42.0 (Tic-Visit :proposal-id 15337 :visit-id "03" :proposal-version -1 :trans-version "20171009" :date "30-Jan-2018 11:07:24.0" :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 6930032 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15337 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "03" :obset-id "A3" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15337 :visit-id "03" :obset-id "B3" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15337 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 15928 :al-overhead-at-end 123 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) false 3 0