Please let me know if there is a problem with this proposal submission. Thank You. -R. Fesen Assigned ID: 705 ----- Attempting Submission 1 (Fri Feb 26 22:35:29 GMT 2010) ----- HST Phase I Proposal 705 (hst_cycle18_Cas_A_final2.pdf.apt) successfully submitted. ----- Attempting Submission 2 (Fri Feb 26 22:40:18 GMT 2010) ----- I have specified the total number of orbits as listed in the observations but APT gives an error concerning my input of total Cycle 18 orbits. Putting in zero orbits makes the error go away. Removed the orients and put them in the comments ----- Attempting Submission 3 (Sat Jul 31 17:26:00 GMT 2010) ----- ----- Attempting Submission 4 (Wed Aug 04 12:21:38 GMT 2010) ----- HST Phase II Proposal 12300 (12300.apt) successfully submitted. ----- Attempting Submission 5 (Wed Aug 04 12:49:14 GMT 2010) ----- The young Galactic remnant Cas A provides perhaps our clearest look at the explosion of a high mass, core-collapse supernova. Two seemingly opposing streams or "jets" of high-velocity debris extending outward along its northeastern and southwestern limbs have expansion velocities more than twice that of the remnant's bright main shell. Interpretation of these jets has been controversial mainly based on energy considerations. However, SN debris located at the farthest tip of the NE jet is S-rich suggesting an origin deep inside the progenitor due to an overturning of layers as predicted in some aspherical explosion models. If similar ejecta were also found present in the SW jet's outermost knots, it would be strong evidence in support of an asymmetric explosion of Cas A and in turn for CCSNe in general. Unfortunately, substantial extinction toward both jets has prevented a thorough investigation of their properties and, in particular, whether they constitute a true bipolar outflow. We propose to use the WFC3/IR channel in 5 CVZ orbits to obtain a deep imaging survey of Cas A's jets to probe their true extent and structure. The combination of WFC3's high throughput at the [S II] 10287-10370 and [S III] 9069, 9531 emission lines, a pixel scale well matched to typical jet knot sizes, and decreased extinction at 1 micron will dramatically improve jet knot detections over prior ACS/WFC images. Follow-up observations in Cycle 19 will allow robust knot identification via proper motions, and KPNO 4m near-IR spectroscopy will provide knot radial velocities. Our goal is to develop a thorough 3D kinematic and chemical map of Cas A's jets which will constrain their nature and relationship to the remnant's main spherical shell of ejecta.

The goal is to image both outer NE and SW ejecta "jets" (high-velocity streams of SN debris) in the Cas A supernova remnant, as well as part of the main shell. ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 4.0 false false false false false false SUPPORTED ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 ISM EJECTA SNR J2000 23 23 23.6200 +58 48 49.00 J2000 WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F098M POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1 false 1280596791857 The scheduling data was generated by CASM 18.1. CASM was run in Phase II mode. please schedule at U3=112 (Tic-Visit :proposal-id 12300 :visit-id "01" :proposal-version -1 :trans-version "20100218" :date "31-Jul-2010 13:19:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 5501184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12300 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 12300 :visit-id "01" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 12300 :visit-id "01" :obset-id "B1" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 12300 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 16188 :al-overhead-at-end 0 :internal-dur-at-end 459 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) false 3 0 1280596807527 The scheduling data was generated by CASM 18.1. CASM was run in Phase II mode. please schedule at U3 112-112.5 (Tic-Visit :proposal-id 12300 :visit-id "02" :proposal-version -1 :trans-version "20100218" :date "31-Jul-2010 13:20:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3551392 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12300 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 12300 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 12300 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 10265 :al-overhead-at-end 0 :internal-dur-at-end 706 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) false 2 0