Revised phase 2 proposal submitted 2009 Feb 3. This is identical with original version, except that I have begun each visit with an Acq-Search exposure, with Scan-Size=2, and have adjusted science exposures accordingly. Revised phase 2 (now ver 3) proposal submitted 2009 March 11. Errors in Buffer Time have been corrected, after these were pointed out by Parviz Ghavamian. For Visit 2, orbits 2-5 are now a single long exposure of this faint source, each with a different FP-POS position. ----- Attempting Submission 1 (Tue Jul 01 14:14:28 GMT 2008) ----- Phase II Proposal 11659 (sn1006_ph2_080617.apt) successfully submitted. ----- Attempting Submission 2 (Tue Feb 03 14:53:15 GMT 2009) ----- ----- Attempting Submission 3 (Wed Mar 11 21:51:54 GMT 2009) ----- Assigned ID: 931 ----- Attempting Submission 1 (Sat Mar 08 00:57:03 GMT 2008) ----- Probing the Interior of SN1006 The remnant of SN 1006 is unique among all supernova remnants in having 3 identified background UV sources that can be used to probe cold, otherwise unseen ejecta within the remnant shell. We propose high-resolution spectra from COS to obtain spectra of all three of these. The brightest of these, the Schweizer-Middleditch star (the only one with extensive previous high-quality UV spectra) shows Si II absorption with an extremely unusual asymmetric profile with a sharp edge on the red end, indicating the velocity of material just entering the reverse shock. Our new spectrum can be compared with STIS observations from 1999 to measure definitively the velocity change as the reverse shock eats its way into ever-more-slowly-expanding ejecta. One may well ask, however, if this profile is truly representative, and we seek to answer that with a spectrum of a background quasar at a similar distance of the SM star from the projected center, but in a different direction. And by investigating the detailed structure of these two sources and a second quasar, we can probe small-scale structure in the ejecta. No object other than SN1006 offers a similar opportunity to probe the distribution of ejecta within the remnant of a Type Ia supernova.
Our science goals require high-resolution FUV spectra of the Schweizer-Middleditch star and the two QSOs that lie behind SN1006. The most important wavelength range covers the very broad Si II line (rest wavelength 1260 Ang), though we expect this to be highly broadened and Doppler-shifted, so we require spectra covering a contiguous range 1230-1310 Ang with good resolution and the reasonable signal/noise. Our goal is S/N = 20 for the S-M star, and S/N = 5 for the two QSO's (which we may bin-up in software afterwards). Secondary but important lines that we will also cover with this same setup are spectra of Si III line just to the red of Lyman alpha, and Si IV 1400 Ang. ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 0.0 false false false false false SUPPORTED STAR SDO SCHWEIZER-MIDDLEDITCH S9DC012650 J2000 15 02 53.1800 +41 59 17.70 J2000 GALAXY QSO S9DC018293 J2000 05 02 55.2000 -41 54 29.80 J2000 GALAXY QSO S9DC020963 J2000 15 03 33.9300 -41 52 23.70 J2000 COS/FUV Spectroscopic No No G130M 1318 COS/FUV Spectroscopic No No G130M 1318 COS/FUV Spectroscopic No No G130M 1318 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/winkler/Documents/Research/HST Cycle 17/sn1006 phase 2/OP-cache/11659_buffcorrected_pfw-v01.xml Acquisition and FUV spectra of S-M star (Tic-Visit :proposal-id 11659 :visit-id "01" :proposal-version -1 :trans-version "20090130" :date "11-Mar-2009 12:08:42.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 330576 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11659 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11659 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3017 :al-overhead-at-end 0 :internal-dur-at-end 428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 1 0 Needs mirror B since too bright. (Mirror A gives 208 cts/pixel max) See ETC: COS 71702 FUV spectra of S-M star. Use FP-POS=1,2,3,4 rather than AUTO to achieve maximum exposure and optimum resolution and S/N. See ETC: COS71708 for estimate of exposure and buffer times. FUV spectra of S-M star. Use FP-POS=1,2,3,4 rather than AUTO to achieve maximum exposure and optimum resolution and S/N. See ETC: COS71708 for estimate of exposure and buffer times. FUV spectra of S-M star. Use FP-POS=1,2,3,4 rather than AUTO to achieve maximum exposure and optimum resolution and S/N. See ETC: COS71708 for estimate of exposure and buffer times. FUV spectra of S-M star. Use FP-POS=1,2,3,4 rather than AUTO to achieve maximum exposure and optimum resolution and S/N. See ETC: COS71708 for estimate of exposure and buffer times. The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/winkler/Documents/Research/HST Cycle 17/sn1006 phase 2/OP-cache/11659_buffcorrected_pfw-v02.xml Acquisition and FUV Spectra of fainter QSO: 1503-4155 this takes 5 orbits (Tic-Visit :proposal-id 11659 :visit-id "02" :proposal-version -1 :trans-version "20090130" :date "11-Mar-2009 17:32:32.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 643664 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11659 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11659 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "02" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3154 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "02" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3154 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "02" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3154 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "02" :orbit-number 5 :pcs-time 195 :si-vis-utilization 3154 :al-overhead-at-end 0 :internal-dur-at-end 428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 5 0 Search for Target Acquisition Target acquisition for QSO1503-4155 ETC: COS72115 Time is conservative; should give S/N well over 40 First of 5 FUV spectra exposures ETC: COS72086 Second of 5 FUV spectra; full orbit with FP-POS=1 ETC: COS72086 Third of 5 FUV spectra; full orbit with FP-POS=2 ETC: COS72086 Fourth of 5 FUV spectra; full orbit with FP-POS=3 ETC: COS72086 Fifth of 5 FUV spectra; full orbit with FP-POS=3 ETC: COS72086 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /Users/winkler/Documents/Research/HST Cycle 17/sn1006 phase 2/OP-cache/11659_buffcorrected_pfw-v03.xml Acquisition and FUV Spectra of fainter QSO: 1503-4155 this takes 5 orbits (Tic-Visit :proposal-id 11659 :visit-id "03" :proposal-version -1 :trans-version "20090130" :date "11-Mar-2009 17:40:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 1269840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11659 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11659 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "03" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3151 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "03" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3151 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11659 :visit-id "03" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3151 :al-overhead-at-end 0 :internal-dur-at-end 428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 4 0 Predicted S/N=55 (ETC: COS72127) First of 4 FUV spectra exposures See ETC: COS72085 Second of 4 FUV spectra exposures Third of 4 FUV spectra exposures Fourth of 4 FUV spectra exposures