10091( 15) - 02/04/04 15:24 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10091 Version: 15 Check-in Date: 04-Feb-2004 15:23:05 1.Proposal Title: Soft X-ray Transient in Mira AB ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO/DD 12 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Dr. Margarita Karovska Smithsonian Institution Astrophysical Observatory CoI: Dr. Warren Hack Space Telescope Science Institute N CoI: Dr. John C. Raymond Smithsonian Institution Astrophysical N Observatory CoI: Dr. Brian E. Wood University of Colorado at Boulder N ------------------------------------------------------------------------------------ 5. Abstract Chandra Observations of Mira AB symbiotic-like system obtained in Dec. 2003 detected an unexpected bright soft source (<0.7 keV) in addition to the previously observed harder (1-4 keV) emission which has been attributed to the accretion disk around Mira B. The newly discovered soft X-ray source could indicate an instability in the accretion disk, an accretion related outburst in the system, or a flare-like activity in Mira A. We request DD time to carry out HST/STIS imaging and spectroscopy of Mira AB at UV wavelengths, where signatures of these processes are very likely to be found. Because of the likely transient nature of this phenomenon, timely HST observations are critical for determining the nature and the characteristics of the soft X-ray source and therefore we cannot wait for Cucle 13 observatios including TOO observations. ------------------------------------------------------------------------------------ 10091( 15) - 02/04/04 15:24 - [ 2] Observations Description ------------------------ gets munched Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10091( 15) - 02/04/04 15:24 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 MIRA-A EXT-STAR, INTERACTING RA=02H19M20.79S +/- 0.1", DEC=- J2000 V = 8.5+/-1.5 BINARY, AGB STAR, 02D58'39.5" +/- 0.1" B-V = 1.42+/-0.20; TYPE=M5III ; F- ACCRETION DISK, CONT(3000)=1.0+/-0.6e-14 ; F- SYMBIOTIC STAR LINE(2803)=5.0+/-3.0e-13 ; W- LINE(2803)=0.5+/-0.1; F- CONT(3600)=2.0+/-1.2e-14; F- CONT(5006)=3.5+/-2.0e-13 Coordinate Source: HIPPARCOS/TYCHO_CATALOGUE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.000700000 -0.2395 0.0078 2 MIRA-B EXT-STAR, ACCRETION RA-OFF=-0.038S +/- 0.1S, DEC- J2000 V = 10.0+/-1.5 DISK, B3-B5 V-IV, WDO, OFF=-0.2" +/- 0.1", FROM 1 F-CONT(3000)=3.0+/-1.0e-13; F- SYMBIOTIC STAR CONT(1600)=3.0+/-1.0e-14; F- LINE(2803)=7.0+/-2.0e-12; W- LINE(2803)=2.5+/-0.4; F- LINE(1550)=2.0+/-0.5e-12; W- LINE(1550)=2.0+/-0.5 Coordinate Source: HIPPARCOS/TYCHO_CATALOGUE Comments: Offset coordinates measured from an HST image X31G0108T (GO5822) Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0 0.0 0.0 3 MIRA-B-CORR EXT-STAR, ACCRETION RA-OFF=0.035S +/- 0.1S, DEC- J2000 V = 10.0+/-1.5 DISK, B3-B5 V-IV, WDO, OFF=-0.145" +/- 0.1", FROM 1 F-CONT(3000)=3.0+/-1.0e-13; F- SYMBIOTIC STAR CONT(1600)=3.0+/-1.0e-14; F- LINE(2803)=7.0+/-2.0e-12; W- LINE(2803)=2.5+/-0.4; F- LINE(1550)=2.0+/-0.5e-12; W- LINE(1550)=2.0+/-0.5 Coordinate Source: HIPPARCOS/TYCHO_CATALOGUE Comments: Offset coordinates measured from an HST image o8wy01040 visit 1 Go/DD 10091 10091( 15) - 02/04/04 15:24 - [ 4] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Since we do not know the cause of the X-ray transient we would like to determine if there is a significant change in the flux in the UV spectrum before we obtain the MAMA observations because of bright object protection concerns. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MIRA-A STIS/C ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.4 S CD ------------------------------------------------------------------------------------------------------------------------------------ 2 MIRA-A STIS/C ACCUM 0.2X0.2 G230LB 2375 GAIN=4 1 900 S CD ------------------------------------------------------------------------------------------------------------------------------------ 3 MIRA-B STIS/C ACCUM 0.2X0.2 G230LB 2375 GAIN=4 1 300 S CD ------------------------------------------------------------------------------------------------------------------------------------ 4 MIRA-B STIS/C ACCUM 52X2 G230LB 2375 GAIN=4 1 300 S CD ------------------------------------------------------------------------------------------------------------------------------------ 5 MIRA-B STIS/C ACCUM F28X50O MIRROR 1 5 S CD II ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 1 none none none none 1 tbd 01 2 none none none 1 1 tbd 01 2 none none none 2 1 tbd 01 3 none none none 1 1 tbd 01 3 none none none 2 1 tbd 01 4 none none none 1 1 tbd 01 4 none none none 2 1 tbd 01 5 none none none 1 1 tbd 01 5 none none none 2 1 tbd 10091( 15) - 02/04/04 15:24 - [ 5] Visit: 02 Visit Priority: Visit Requirements: SEQ 02, 03 WITHIN 1.5 Orbits; ON HOLD On Hold Comments: Visit 2 is on hold in expectation of the results from the CCD UV spectroscopy in Visit 1. If the brightness of the target does not exceed the MAMA limits we'll proceed with Visit 2 and Visit 3 Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MIRA-A STIS/C ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.4 S CD ------------------------------------------------------------------------------------------------------------------------------------ 2 MIRA-A STIS/N ACCUM 0.2X0.2 E230M 2707 1 900 S UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 3 MIRA-B-CORR STIS/N ACCUM 0.2X0.2 E230M 2707 1 600 S UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 4 MIRA-B-CORR STIS/C ACCUM F28X50O MIRROR 1 5 S CD II ------------------------------------------------------------------------------------------------------------------------------------ 5 MIRA-B-CORR STIS/C ACCUM F28X50O MIRROR 1 5 S POS TARG 0.1275, 0.1275 CD II ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 1 none none none none 1 tbd 02 2 none none none none 1 tbd 02 3 none none none none 1 tbd 02 4 none none none 1 1 tbd 02 4 none none none 2 1 tbd 02 5 none none none 1 1 tbd 02 5 none none none 2 1 tbd 10091( 15) - 02/04/04 15:24 - [ 6] Visit: 03 Visit Priority: Visit Requirements: ON HOLD On Hold Comments: Visit 3 is on hold in expectation of the results from the CCD UV spectroscopy in Visit 1. If the brightness of the target does not exceed the MAMA limits we'll proceed with Visit 2 and Visit 3 Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MIRA-A STIS/C ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.4 S CD ------------------------------------------------------------------------------------------------------------------------------------ 2 MIRA-A STIS/F ACCUM 0.2X0.2 E140M 1425 1 2100 S UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 3 MIRA-B-CORR STIS/F ACCUM 0.2X0.2 E140M 1425 1 2100 S UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 10091( 15) - 02/04/04 15:24 - [ 7] Summary Form for Proposal 10091 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25ND3 0.2X0.2 52X2 F28X50OII ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD STIS/NUV-MAMA STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT GAIN=4 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/DD ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 02, 03 WITHIN 1.5 Orbits; ON HOLD POS TARG 0.1275, 0.1275 ON HOLD ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G230LB E230M E140M ------------------------------------------------------------------------------------------------------------------------------------ Target Names MIRA-A MIRA-B MIRA-B-CORR ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 2375 2707 1425 ------------------------------------------------------------------------------------------------------------------------------------