13436( 2) - 30-Jun-2013 18:36:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13436 Version: 2 Check-in Time: 30-Jun-2013 18:36:57 STScI Edit Number: 0 Title Ion Temperatures in a Collisionless Supernove Remnant Shock Wave ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. John C. Raymond Smithsonian Institution Astrophysical Y Observatory CoI: Dr. Parviz Ghavamian Towson University N CoI: Dr. William P. Blair The Johns Hopkins University N CoI: Dr. Richard Edgar Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract Electrons, protons and heavy ions can all have different temperatures behind a collisionless shock. The temperatures are important for understanding the physics of the shock and for correctly interpreting observations in terms of shock parameters. They also bear upon the acceleration of different species in the Cosmic Ray population. We propose to obtain a deep enough integration to measure the kinetic temperatures of C IV and He II in a 350 km/s non-radiative shock in the northern Cygnus Loop where we have extensive complementary H alpha and X-ray data. ------------------------------------------------------------------------------------ Observations Description ------------------------ We wish to observe a position in the Cygnus Loop that we observed for 1 orbit under a Cycle 19 proposal for 9 additional orbits in order to obtain high enough signal-to-noise to measure the line widths of the He II 1640 and C IV 1550 lines. All the observations will be made with th COS 160M grating, 1577 tilt. We also wish to observe the planetary nebula NGC 6853 for one orbit in order to obtain a reliable measurement of the instrument profile of COS when the PSA is filled with diffuse emission. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13436( 2) - 30-Jun-2013 18:36:57 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CYGNUSLOOP-P ISM, SHOCK FRONT, SNR RA=20H54M43.6220S +/- 0.01", J2000 V = 35 +/- 0 C IV 1550 and He II 1640 1 DEC=+32D15'57.00" +/- 0.01" fluxes observed with COS are 1.12e-15 and 1.01e-15 erg/(cm2 s), respectively. Reference Frame: ICRS Comments: The Cygnus Loop position is slightly different (10 arcsec) than that listed in the proposal. We have decided that Position 1 from our Cycle 19 HST program is a better option than Position 2 listed in Table 1 of the proposal because the He II line (the more challenging observation) is brighter at Position 1 and because there is less possibility of confusion with C IV produced by carbon ions that come from sputtering of dust grains. Positions 1 and 2 are separated by 10", so this is a very slight change. Also, we have added the 0.2" proper motion appropriate for an observation next year. As the emission fills the aperture, this proper motion correction does not have to be precise. APT warns that acquisitions should be performed. This is an extended source, and acquisition is not feasible. ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6853 CALIBRATION, EMISSION RA=19H59M36.5500S +/- 0.1", J2000 V = 35 +/- 0 C IV 1550 and He II 1640 LINE NEBULA, POINT DEC=+22D42'48.20" +/- 0.1" are 1.4e-14 and 3.0e-14 ergs/(cm2 s) in SPREAD FUNCTION the COS aperture respectively Reference Frame: ICRS Comments: This observation is designed to obtain the instrument profile of COS with the G160M grating for an extended source that fills the aperture. The line width in this planetary nebula is small compared to the roughly 200 km/s resolution of COS with the PSA aperture filled. APT warns that target acquistion is recommended, but this is a very large extended source, so acquistion is not feasible. ------------------------------------------------------------------------------------------------------------------------------------ 13436( 2) - 30-Jun-2013 18:36:57 - [ 3] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: This is the first visit to Cygnus Loop P7, Position 1 to obtain 5 orbits with COS , G160M, centered at 1577 A Each orbit is divided into 4 FP-positions. 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 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=1 see below (2868 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=2 see below (2981 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=3 see below (2981 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=4 see below (2981 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=4 see below (2981 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 | ------------------------------------------------------------------------------------------------------------------------------------ CYGNUSLOOP-P1 1 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 2868.0 S G CYGNUSLOOP-P1 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 2 2981.0 S G CYGNUSLOOP-P1 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 2981.0 S G CYGNUSLOOP-P1 4 COS/FUV TIME-TA PSA G160M 1577 none none none none 4 2981.0 S G CYGNUSLOOP-P1 5 COS/FUV TIME-TA PSA G160M 1577 none none none none 5 2981.0 S G 13436( 2) - 30-Jun-2013 18:36:57 - [ 4] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: This is the second visit to Position 1 of Cygnus P-7 to obtain 4 orbits, each split into 4 FP-positions. 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 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=1 see below (2868 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=2 see below (2981 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=3 see below (2981 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 CYGNUSLOOP- COS/FUV TIME-TA PSA G160M 1577 EXTENDED=YES, 1 625 S P1 G BUFFER-TIME=15000, FP-POS=4 see below (2981 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 | ------------------------------------------------------------------------------------------------------------------------------------ CYGNUSLOOP-P1 1 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 2868.0 S G CYGNUSLOOP-P1 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 2 2981.0 S G CYGNUSLOOP-P1 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 2981.0 S G CYGNUSLOOP-P1 4 COS/FUV TIME-TA PSA G160M 1577 none none none none 4 2981.0 S G 13436( 2) - 30-Jun-2013 18:36:57 - [ 5] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: This a one orbit broken in to 4 FP-positions to obtain an observation of a planetary nebula with narrow emission lines that fill the COS PSA aperture. The purpose is to obtain an accurate instrument profile that can be used to deconvolve the profile of the Cygnus Loop shock wave. The position selected is based on IUE Small Aperture exposure SWP17420, and it is 49" W and 27" S of the central star. 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 NGC6853 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=15000, 1 625 S G EXTENDED=YES, FP-POS=ALL see below (2527 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC6853 1 COS/FUV TIME-TA PSA G160M 1577 none none none 1 1 637.0 S G NGC6853 1 COS/FUV TIME-TA PSA G160M 1577 none none none 2 1 630.0 S G NGC6853 1 COS/FUV TIME-TA PSA G160M 1577 none none none 3 1 630.0 S G NGC6853 1 COS/FUV TIME-TA PSA G160M 1577 none none none 4 1 630.0 S G 13436( 2) - 30-Jun-2013 18:36:57 - [ 6] Summary Form for Proposal 13436 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=15000, EXTENDED=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G160M ------------------------------------------------------------------------------------------------------------------------------------ Target Names CYGNUSLOOP-P1, NGC6853 ------------------------------------------------------------------------------------------------------------------------------------