17499( 4) - 06-Sep-2023 21:33:09 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17499 Version: 4 Check-in Time: 06-Sep-2023 21:33:09 STScI Edit Number: 1 Title Dust Destruction in Supernova Remnant Shock Waves ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. John Charles Raymond Smithsonian Institution Astrophysical Y Observatory CoI: Dr. Jonathan D. Slavin Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract Supernova remnant shock waves dominate the destruction of interstellar dust, but the observational constraints on the destruction efficiency are poor. This is partly due to incomplete knowledge of the shock parameters and partly to inadequate observations, especially in the UV. We propose to obtain accurate fractions of the dust destroyed in 6 radiative shocks in the Cygnus Loop for which the shock wave parameters -- shock speed, preshock density and magnetic field -- are accurately known. We will use the COS UV spectra to measure the gas phase abundances of C, O and Si. Oxygen is nearly undepleted in the preshock gas, while C and Si are locked up in grains until the grains are destroyed. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain COS FUV spectra of 6 positions in the Cygnus Loop with the G140L grating. Each spectrum will be a 1 orbit exposure. There are no restrictions on roll angle. The emission is diffuse, so no peakup should be attempted. ------------------------------------------------------------------------------------ 17499( 4) - 06-Sep-2023 21:33:09 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-1 ISM, SHOCK FRONT RA=20H45M37.8309S +/- 0.1", J2000 V = 18 +/- 1 DEC=+30D59'52.39" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 2 CLWEST-2 ISM, SHOCK FRONT RA=20H45M42.4328S +/- 0.1", J2000 V = 18 +/- 1 DEC=+31D00'26.47" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 3 CLWEST-3 ISM, SHOCK FRONT RA=20H45M38.2023S +/- 0.1", J2000 V = 18 +/- 1 DEC=+30D59'42.97" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 4 CLWEST-4 ISM, SHOCK FRONT RA=20H45M42.9308S +/- 0.1", J2000 V = 18 +/- 1 DEC=+31D00'11.24" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 5 CLWEST-5 ISM, SHOCK FRONT RA=20H45M40.1793S +/- 0.1", J2000 V = 18 +/- 1 DEC=+30D58'38.61" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 6 CLWEST-6 ISM, SHOCK FRONT RA=20H45M40.6818S +/- 0.1", J2000 V = 18 +/- 1 DEC=+30D58'24.54" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 17499( 4) - 06-Sep-2023 21:33:09 - [ 3] Visit: 01 (CL-West-1) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-1 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=400, FP-POS=ALL 1 500 S G see below (2248 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLWEST-1 1 COS/FUV TIME-TA PSA G140L 1280 none none none 1 1 562.0 S G CLWEST-1 1 COS/FUV TIME-TA PSA G140L 1280 none none none 2 1 562.0 S G CLWEST-1 1 COS/FUV TIME-TA PSA G140L 1280 none none none 3 1 562.0 S G CLWEST-1 1 COS/FUV TIME-TA PSA G140L 1280 none none none 4 1 562.0 S G 17499( 4) - 06-Sep-2023 21:33:09 - [ 4] Visit: 02 (CL West - 2) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-2 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=400, FP-POS=ALL 1 500 S G see below (2248 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLWEST-2 1 COS/FUV TIME-TA PSA G140L 1280 none none none 1 1 562.0 S G CLWEST-2 1 COS/FUV TIME-TA PSA G140L 1280 none none none 2 1 562.0 S G CLWEST-2 1 COS/FUV TIME-TA PSA G140L 1280 none none none 3 1 562.0 S G CLWEST-2 1 COS/FUV TIME-TA PSA G140L 1280 none none none 4 1 562.0 S G 17499( 4) - 06-Sep-2023 21:33:09 - [ 5] Visit: 03 (CL West -3) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-3 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=400, FP-POS=ALL 1 500 S G see below (2248 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLWEST-3 1 COS/FUV TIME-TA PSA G140L 1280 none none none 1 1 562.0 S G CLWEST-3 1 COS/FUV TIME-TA PSA G140L 1280 none none none 2 1 562.0 S G CLWEST-3 1 COS/FUV TIME-TA PSA G140L 1280 none none none 3 1 562.0 S G CLWEST-3 1 COS/FUV TIME-TA PSA G140L 1280 none none none 4 1 562.0 S G 17499( 4) - 06-Sep-2023 21:33:09 - [ 6] Visit: 04 (CL West - 4) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-4 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=400, FP-POS=ALL 1 500 S G see below (2248 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLWEST-4 1 COS/FUV TIME-TA PSA G140L 1280 none none none 1 1 562.0 S G CLWEST-4 1 COS/FUV TIME-TA PSA G140L 1280 none none none 2 1 562.0 S G CLWEST-4 1 COS/FUV TIME-TA PSA G140L 1280 none none none 3 1 562.0 S G CLWEST-4 1 COS/FUV TIME-TA PSA G140L 1280 none none none 4 1 562.0 S G 17499( 4) - 06-Sep-2023 21:33:09 - [ 7] Visit: 05 (CL West - 5) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-5 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=400, FP-POS=ALL 1 500 S G see below (2248 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLWEST-5 1 COS/FUV TIME-TA PSA G140L 1280 none none none 1 1 562.0 S G CLWEST-5 1 COS/FUV TIME-TA PSA G140L 1280 none none none 2 1 562.0 S G CLWEST-5 1 COS/FUV TIME-TA PSA G140L 1280 none none none 3 1 562.0 S G CLWEST-5 1 COS/FUV TIME-TA PSA G140L 1280 none none none 4 1 562.0 S G 17499( 4) - 06-Sep-2023 21:33:09 - [ 8] Visit: 06 (CL West - 6) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CLWEST-6 COS/FUV TIME-TA PSA G140L 1280 BUFFER-TIME=400, FP-POS=ALL 1 500 S G see below (2248 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLWEST-6 1 COS/FUV TIME-TA PSA G140L 1280 none none none 1 1 562.0 S G CLWEST-6 1 COS/FUV TIME-TA PSA G140L 1280 none none none 2 1 562.0 S G CLWEST-6 1 COS/FUV TIME-TA PSA G140L 1280 none none none 3 1 562.0 S G CLWEST-6 1 COS/FUV TIME-TA PSA G140L 1280 none none none 4 1 562.0 S G 17499( 4) - 06-Sep-2023 21:33:09 - [ 9] Summary Form for Proposal 17499 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=400, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L ------------------------------------------------------------------------------------------------------------------------------------ Target Names CLWEST-1, CLWEST-2, CLWEST-3, CLWEST-4, CLWEST-5, CLWEST-6 ------------------------------------------------------------------------------------------------------------------------------------