13111( 7) - 21-May-2014 10:41:51 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13111 Version: 7 Check-in Time: 21-May-2014 10:41:51 STScI Edit Number: 4 Title Monitoring M31 for BHXNe ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Robin Barnard Smithsonian Institution Astrophysical Y Observatory CoI: Dr. Stephen S. Murray Smithsonian Institution Astrophysical N Observatory CoI: Dr. Paul Callanan University College Cork N CoI: Dr. Francis Primini Smithsonian Institution Astrophysical N Observatory CoI: Dr. Mike R Garcia Harvard University N ------------------------------------------------------------------------------------ Abstract During A01-13 we found ~28 Black Hole X-ray Novae (BHXNe) in M31 using Chandra, and with HST follow-up have estimated orbital periods for 12 of these. Observations are under way with HST to attempt to estimate additional periods. Preliminary results indicate these orbital periods are shorter than in the Galaxy and also shorter nearer the nucleus, indicating that some BHXN are formed via tidal capture. Continued observations can confirm or refute this. We propose to continue this program concentrating our HST resources on a single transient which is >1e38 erg/s or <1 from the nucleus. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXNe (and other variables) in M31. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a target of opportunity. We will trigger based on the discovery of a bright X-ray transient with Chandra. The first observation will be made within ~3 weeks of the Chandra detection (2 orbits); a follow-up observation will be made 6 months later (also 2 orbits). The target co-ordinates will be updated at the time of the trigger Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13111( 7) - 21-May-2014 10:41:51 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 M-31 UNIDENTIFIED, X-RAY RA=00H42M52.4670S +/- 0.19", J2000 V = 25 EMITTER DEC=+41D16'31.17" +/- 0.14" Reference Frame: Other: SIMBAD Comments: New M31 transient. ------------------------------------------------------------------------------------------------------------------------------------ 2 M-31-CORE UNIDENTIFIED, X-RAY RA=00H42M5.7700S +/- 0.1", J2000 V = 3.44 EMITTER DEC=+41D13'30.43" +/- 0.1" Reference Frame: ICRS Comments: Position to be ubdated ~3 weeks before observation; the location will be within 8' of the current position. ------------------------------------------------------------------------------------------------------------------------------------ 13111( 7) - 21-May-2014 10:41:51 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13111( 7) - 21-May-2014 10:41:51 - [ 4] Visit: 01 Visit Requirements: SCHED 100% 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 M-31 ACS/WFC ACCUM WFC1-CTE F435W 1 1000 S PATTERN 1 1 see below (4790 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 | ------------------------------------------------------------------------------------------------------------------------------------ M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 1 none none none 1 1149.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 2 none none none 1 1149.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 3 none none none 2 1246.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 4 none none none 2 1246.0 S 13111( 7) - 21-May-2014 10:41:51 - [ 5] Visit: 02 Visit Requirements: SCHED 100% 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 M-31-CORE ACS/WFC ACCUM WFC1-CTE F435W 1 1100 S PATTERN 1 1 see below (4790 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 | ------------------------------------------------------------------------------------------------------------------------------------ M-31-CORE 1 ACS/WFC ACCUM WFC1-CTE F435W 1 none none none 1 1149.0 S M-31-CORE 1 ACS/WFC ACCUM WFC1-CTE F435W 2 none none none 1 1149.0 S M-31-CORE 1 ACS/WFC ACCUM WFC1-CTE F435W 3 none none none 2 1246.0 S M-31-CORE 1 ACS/WFC ACCUM WFC1-CTE F435W 4 none none none 2 1246.0 S 13111( 7) - 21-May-2014 10:41:51 - [ 6] Summary Form for Proposal 13111 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M-31, M-31-CORE ------------------------------------------------------------------------------------------------------------------------------------