(Sorry for the resubmission, I have to remove a Co-I that has no time for contributing) Assigned ID: 371 ----- Attempting Submission 1 (Fri Feb 25 15:02:06 GMT 2011) ----- HST Phase I Proposal 371 (TSN.apt) successfully submitted. ----- Attempting Submission 2 (Fri Feb 25 15:14:36 GMT 2011) ----- ----- Attempting Submission 1 (Tue Jun 21 10:46:08 GMT 2011) ----- We propose to refine the space-velocity measurements of the stars in the central region of SNR 1572, one of the historical Galactic Type Ia supernova remnants. A single-orbit visit with the WFC3/UVIS would allow, in combination with the previous ACS/WFC images obtained in 2003-2005, an astrometric precision of less than 0.05 mas, almost one order of magnitude better than our previous result. Precise knowledge of the kinematics of all of the stars in the region is crucial for determining which one might be the surviving binary companion of the supernova. A precise reconstruction of the parameters of the binary system that gave rise to the supernova would then be possible, complementing the existing observations both from the ground and with the HST, which span the last fourteen years.

This proposal collect images for a subsequent epoch of the field previously observed by ACS/WFC in 2003-2005. We maximized the number of images, and have large dither pattern for internal check of the geometric distortion solution. Parallel observations of ACS/WFC proved to be useless, and weak the primary science. We will not collect parallel ACS/WFC observations. HOT STARS 12 false 0.0 0.0 false false false false SUPPORTED STAR SUPERNOVA This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 WFC3/UVIS Imaging No No F555W ACS/WFC Imaging No No F555W 1308652919217 /home/bedin/PROPOSAL/GO-12469/OP-cache/go12469-v01.xml The scheduling data was generated by CASM 19.3. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12469 :visit-id "01" :proposal-version -1 :trans-version "20110509" :date "21-Jun-2011 12:41:58.0" :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 2310000 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12469 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12469 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3183 :al-overhead-at-end 118 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3516 :pcs-gap 0 ) true 1 0