11659( 4) - 12-Mar-2009 14:35:29 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11659 Version: 4 Check-in Time: 12-Mar-2009 14:35:29 STScI Edit Number: 0 Title Probing the Interior of SN1006 ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. P. Frank Winkler Middlebury College CoI: Dr. Knox S. Long Space Telescope Science Institute N CoI: Dr. Robert A. Fesen Dartmouth College N CoI: Dr. Andrew J. S. Hamilton University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract 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. ------------------------------------------------------------------------------------ Observations Description ------------------------ 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. Real Time Justification ----------------------- Calibration Justification 11659( 4) - 12-Mar-2009 14:35:29 - [ 2] ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11659( 4) - 12-Mar-2009 14:35:29 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 STAR-1503-41 STAR, SDO RA=15H02M53.1780S +/- 0.2", J2000 V = 16.74 +/- 0.04 59 DEC=-41D59'16.52" +/- 0.2" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 2 QSO-1503-415 GALAXY, QSO RA=15H02M55.2690S +/- 0.3", J2000 V = 19.5 +/- 0.3 5 DEC=-41D54'29.82" +/- 0.3" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 3 QSO-1504-415 GALAXY, QSO RA=15H03M34.0010S +/- 0.2", J2000 V = 18.3 +/- 0.2 2 DEC=-41D52'23.46" +/- 0.2" Reference Frame: Other: GSC2.3 Comments: ------------------------------------------------------------------------------------------------------------------------------------ 11659( 4) - 12-Mar-2009 14:35:29 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Acquisition and FUV spectra of S-M star Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 STAR-1503-4 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2 1 30 S 159 RCH ------------------------------------------------------------------------------------------------------------------------------------ 2 STAR-1503-4 COS/NUV ACQ/IMA PSA MIRRORB 1 30 S 159 GE Comments: Needs mirror B since too bright. (Mirror A gives 208 cts/pixel max) See ETC: COS 71702 ------------------------------------------------------------------------------------------------------------------------------------ 3 STAR-1503-4 COS/FUV TIME-TA PSA G130M 1327 FP-POS=1, BUFFER-TIME=439 1 439 S 159 G Comments: 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. ------------------------------------------------------------------------------------------------------------------------------------ 4 STAR-1503-4 COS/FUV TIME-TA PSA G130M 1327 FP-POS=2, BUFFER-TIME=439 1 439 S 159 G Comments: 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. ------------------------------------------------------------------------------------------------------------------------------------ 5 STAR-1503-4 COS/FUV TIME-TA PSA G130M 1327 FP-POS=3, BUFFER-TIME=439 1 439 S 159 G Comments: 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. ------------------------------------------------------------------------------------------------------------------------------------ 6 STAR-1503-4 COS/FUV TIME-TA PSA G130M 1327 FP-POS=4, BUFFER-TIME=439 1 439 S 159 G Comments: 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. ------------------------------------------------------------------------------------------------------------------------------------ 11659( 4) - 12-Mar-2009 14:35:29 - [ 5] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ STAR-1503-4159 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A RCH STAR-1503-4159 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE STAR-1503-4159 3 COS/FUV TIME-TA PSA G130M 1327 none none none none 1 N/A G STAR-1503-4159 4 COS/FUV TIME-TA PSA G130M 1327 none none none none 1 N/A G STAR-1503-4159 5 COS/FUV TIME-TA PSA G130M 1327 none none none none 1 N/A G STAR-1503-4159 6 COS/FUV TIME-TA PSA G130M 1327 none none none none 1 N/A G 11659( 4) - 12-Mar-2009 14:35:29 - [ 6] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: Acquisition and FUV Spectra of fainter QSO: 1503-4155 this takes 5 orbits Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 QSO-1503-41 COS/NUV ACQ/SEA PSA MIRRORA SCAN-SIZE=2 1 150 S 55 RCH Comments: Search for Target Acquisition ------------------------------------------------------------------------------------------------------------------------------------ 2 QSO-1503-41 COS/NUV ACQ/IMA PSA MIRRORA 1 150 S 55 GE Comments: Target acquisition for QSO1503-4155 ETC: COS72115 Time is conservative; should give S/N well over 40 ------------------------------------------------------------------------------------------------------------------------------------ 3 QSO-1503-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=265, FLASH=YES, 1 1060 S 55 G FP-POS=AUTO Comments: First of 5 FUV spectra exposures ETC: COS72086 ------------------------------------------------------------------------------------------------------------------------------------ 4 QSO-1503-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=3090, FLASH=YES, 1 3090 S 55 G FP-POS=1 Comments: Second of 5 FUV spectra; full orbit with FP-POS=1 ETC: COS72086 ------------------------------------------------------------------------------------------------------------------------------------ 5 QSO-1503-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=3090, FLASH=YES, 1 3090 S 55 G FP-POS=2 Comments: Third of 5 FUV spectra; full orbit with FP-POS=2 ETC: COS72086 ------------------------------------------------------------------------------------------------------------------------------------ 6 QSO-1503-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=3090, FLASH=YES, 1 3090 S 55 G FP-POS=3 Comments: Fourth of 5 FUV spectra; full orbit with FP-POS=3 ETC: COS72086 ------------------------------------------------------------------------------------------------------------------------------------ 7 QSO-1503-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=3090, FLASH=YES, 1 3090 S 55 G FP-POS=4 Comments: Fifth of 5 FUV spectra; full orbit with FP-POS=3 ETC: COS72086 ------------------------------------------------------------------------------------------------------------------------------------ 11659( 4) - 12-Mar-2009 14:35:29 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ QSO-1503-4155 1 COS/NUV ACQ/SEA PSA MIRRORA none none none none 1 N/A RCH QSO-1503-4155 2 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE QSO-1503-4155 3 COS/FUV TIME-TA PSA G130M 1327 none none none 1 1 N/A G QSO-1503-4155 3 COS/FUV TIME-TA PSA G130M 1327 none none none 2 1 N/A G QSO-1503-4155 3 COS/FUV TIME-TA PSA G130M 1327 none none none 3 1 N/A G QSO-1503-4155 3 COS/FUV TIME-TA PSA G130M 1327 none none none 4 1 N/A G QSO-1503-4155 4 COS/FUV TIME-TA PSA G130M 1327 none none none none 2 N/A G QSO-1503-4155 5 COS/FUV TIME-TA PSA G130M 1327 none none none none 3 N/A G QSO-1503-4155 6 COS/FUV TIME-TA PSA G130M 1327 none none none none 4 N/A G QSO-1503-4155 7 COS/FUV TIME-TA PSA G130M 1327 none none none none 5 N/A G 11659( 4) - 12-Mar-2009 14:35:29 - [ 8] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: Acquisition and FUV Spectra of fainter QSO: 1503-4155 this takes 5 orbits Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 QSO-1504-41 COS/NUV ACQ/SEA PSA MIRRORA SCAN-SIZE=2 1 50 S 52 RCH ------------------------------------------------------------------------------------------------------------------------------------ 2 QSO-1504-41 COS/NUV ACQ/IMA PSA MIRRORA 1 50 S 52 GE Comments: Predicted S/N=55 (ETC: COS72127) ------------------------------------------------------------------------------------------------------------------------------------ 3 QSO-1504-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=415, FLASH=YES, 1 1660 S 52 G FP-POS=AUTO Comments: First of 4 FUV spectra exposures See ETC: COS72085 ------------------------------------------------------------------------------------------------------------------------------------ 4 QSO-1504-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=633, FLASH=YES, 1 2532 S 52 G FP-POS=AUTO Comments: Second of 4 FUV spectra exposures ------------------------------------------------------------------------------------------------------------------------------------ 5 QSO-1504-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=633, FLASH=YES, 1 2532 S 52 G FP-POS=AUTO Comments: Third of 4 FUV spectra exposures ------------------------------------------------------------------------------------------------------------------------------------ 6 QSO-1504-41 COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=633, FLASH=YES, 1 2532 S 52 G FP-POS=AUTO Comments: Fourth of 4 FUV spectra exposures ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ QSO-1504-4152 1 COS/NUV ACQ/SEA PSA MIRRORA none none none none 1 N/A RCH QSO-1504-4152 2 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE QSO-1504-4152 3 COS/FUV TIME-TA PSA G130M 1327 none none none 1 1 N/A G QSO-1504-4152 3 COS/FUV TIME-TA PSA G130M 1327 none none none 2 1 N/A G QSO-1504-4152 3 COS/FUV TIME-TA PSA G130M 1327 none none none 3 1 N/A G 11659( 4) - 12-Mar-2009 14:35:29 - [ 9] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ QSO-1504-4152 3 COS/FUV TIME-TA PSA G130M 1327 none none none 4 1 N/A G QSO-1504-4152 4 COS/FUV TIME-TA PSA G130M 1327 none none none 1 2 N/A G QSO-1504-4152 4 COS/FUV TIME-TA PSA G130M 1327 none none none 2 2 N/A G QSO-1504-4152 4 COS/FUV TIME-TA PSA G130M 1327 none none none 3 2 N/A G QSO-1504-4152 4 COS/FUV TIME-TA PSA G130M 1327 none none none 4 2 N/A G QSO-1504-4152 5 COS/FUV TIME-TA PSA G130M 1327 none none none 1 3 N/A G QSO-1504-4152 5 COS/FUV TIME-TA PSA G130M 1327 none none none 2 3 N/A G QSO-1504-4152 5 COS/FUV TIME-TA PSA G130M 1327 none none none 3 3 N/A G QSO-1504-4152 5 COS/FUV TIME-TA PSA G130M 1327 none none none 4 3 N/A G QSO-1504-4152 6 COS/FUV TIME-TA PSA G130M 1327 none none none 1 4 N/A G QSO-1504-4152 6 COS/FUV TIME-TA PSA G130M 1327 none none none 2 4 N/A G QSO-1504-4152 6 COS/FUV TIME-TA PSA G130M 1327 none none none 3 4 N/A G QSO-1504-4152 6 COS/FUV TIME-TA PSA G130M 1327 none none none 4 4 N/A G 11659( 4) - 12-Mar-2009 14:35:29 - [ 10] Summary Form for Proposal 11659 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, ACQ/SEARCH, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=265, BUFFER-TIME=3090, BUFFER-TIME=415, BUFFER-TIME=439, BUFFER-TIME=633, FLASH=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, FP-POS=AUTO, SCAN-SIZE=2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, MIRRORA, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names QSO-1503-4155, QSO-1504-4152, STAR-1503-4159 ------------------------------------------------------------------------------------------------------------------------------------