13107( 4) - 01-Jul-2013 12:41:25 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13107 Version: 4 Check-in Time: 01-Jul-2013 12:41:25 STScI Edit Number: 2 Title AG Dra: High-Resolution Spectra of the Brightest Supersoft Source ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Randall Smith Smithsonian Institution Astrophysical Y Observatory CoI: Dr. Andrea Dupree Smithsonian Institution Astrophysical Y Observatory CoI: Dr. John C. Raymond Smithsonian Institution Astrophysical N Observatory CoI: Dr. Nancy S. Brickhouse Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract Supersoft sources (SSS) are a fundamental type of binary evolution that may be key to understanding Type Ia supernovae, but they remain difficult to study due to their rarity. AG Dra is the brightest SSS with an X-ray spectrum that peaks in the LETG bandpass. Our proposed observation will address the many questions that have arisen about this source based on observations in other bandpasses, including the origin of its high bolometric luminosity and whether or not the soft X-rays arise purely from the photosphere of the white dwarf. By combining LETG and HST STIS spectra, both of which could contain lines from the same ions, we will determine not only the primary emission mechanisms but also the velocities and perhaps origins of these ions. ------------------------------------------------------------------------------------ Observations Description ------------------------ STIS observations of the symbiotic star AG Dra, 6 orbits, 2 visits: Visit 1: FUV/MAMA E140M ( total 9408s); Visit 2: NUV/MAMA E230M, 2 positions: 1978 (6048 s ) and 2707 (3330 s) Two visits separated by less than 2 days. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13107( 4) - 01-Jul-2013 12:41:25 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 V-AG-DRA STAR, EMISSION LINE RA=16H01M41.0112S +/- 0.1", J2000 V = 9.82 STAR, K III-I, DEC=+66D48'10.14" +/- 0.1" SYMBIOTIC STAR Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database.' Positions and parallax fro Hipparcos Astrometric catalogue (2007) Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 -0.0012964481173187228 -0.00549 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 13107( 4) - 01-Jul-2013 12:41:25 - [ 3] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: STIS, 1 echelle grating settings, 1 central wavlenghts, repeat 3 times 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 V-AG-DRA STIS/CCD ACQ F25ND3 MIRROR 1 5 S (5 S) GS ACQ SCENARIO BASE1B3 ------------------------------------------------------------------------------------------------------------------------------------ 2 V-AG-DRA STIS/FUV ACCUM 0.2X0.2 E140M 1425 3 2600 S -MAMA see below (9400 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-AG-DRA 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A V-AG-DRA 2 STIS/FUV ACCUM 0.2X0.2 E140M 1425 none none 1 none 1 2740.0 S -MAMA V-AG-DRA 2 STIS/FUV ACCUM 0.2X0.2 E140M 1425 none none 2 none 2 3330.0 S -MAMA V-AG-DRA 2 STIS/FUV ACCUM 0.2X0.2 E140M 1425 none none 3 none 3 3330.0 S -MAMA 13107( 4) - 01-Jul-2013 12:41:25 - [ 4] Visit: 02 Visit Requirements: AFTER 01 BY 0 D TO 2 D 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 V-AG-DRA STIS/CCD ACQ F25ND3 MIRROR 1 5 S (5 S) GS ACQ SCENARIO BASE1B3 ------------------------------------------------------------------------------------------------------------------------------------ 2 V-AG-DRA STIS/NUV ACCUM 0.2X0.2 E230M 1978 2 2260 S -MAMA see below (6040 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 V-AG-DRA STIS/NUV ACCUM 0.2X0.2 E230M 2707 1 2000 S -MAMA see below (3330 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-AG-DRA 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A V-AG-DRA 2 STIS/NUV ACCUM 0.2X0.2 E230M 1978 none none 1 none 1 2710.0 S -MAMA V-AG-DRA 2 STIS/NUV ACCUM 0.2X0.2 E230M 1978 none none 2 none 2 3330.0 S -MAMA V-AG-DRA 3 STIS/NUV ACCUM 0.2X0.2 E230M 2707 none none none none 3 3330.0 S -MAMA 13107( 4) - 01-Jul-2013 12:41:25 - [ 5] Summary Form for Proposal 13107 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.2, F25ND3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 0 D TO 2 D, GS ACQ SCENARIO BASE1B3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140M, E230M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names V-AG-DRA ------------------------------------------------------------------------------------------------------------------------------------