12753( 8) - 22-Feb-2012 21:30:35 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12753 Version: 8 Check-in Time: 22-Feb-2012 21:30:35 STScI Edit Number: 6 Title Monitoring M31 for BHXNe ------------------------------------------------------------------------------------ Type Cycle GO 19 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Michael R. Garcia Smithsonian Institution Astrophysical Observatory CoI: Dr. Robin Barnard Harvard University N 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 ------------------------------------------------------------------------------------ Abstract During A01-12 we found ~27 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. We propose to continue this program concentrating our HST resources on a single transient which is >1e38 erg/s or <2Õ from the nucleus. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXNe (and other variables) in M31. Our GO+GTO programs have accumulated over 375ks ACIS-I exposure on the bulge within the 3Õ mirror sweet spot, and total Chandra exposure on M31 is now almost 1Msec. By continuing our monitoring program through a second decade we will reach ~800ks within 3Õ of the bulge. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will trigger on observing a suitable bright X-ray transient with Chandra. The first observation is to be made as soon as possible after the trigger, and the second observation will be made ~6 months later, if no serendipitous observation exists in the archive. We wish to use ACS/WFC to be consistent with the other transients that we have already observed with HST over the last several cycles. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- 12753( 8) - 22-Feb-2012 21:30:35 - [ 2] ------------------------------------------------------------------------------------ 12753( 8) - 22-Feb-2012 21:30:35 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 M-31 GALAXY, SPIRAL RA=00H42M43.6830S +/- 0.1", J2000 V = 20 DEC=+41D25'18.53" +/- 0.1" Reference Frame: ICRS Comments: Position will be updated 3--4 weeks before observation, and will be within 8' of the original position ------------------------------------------------------------------------------------------------------------------------------------ 12753( 8) - 22-Feb-2012 21:30:35 - [ 4] 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 ------------------------------------------------------------------------------------------------------------------------------------ 12753( 8) - 22-Feb-2012 21:30:35 - [ 5] Visit: 01 Visit Requirements: BETWEEN 05-MAR-2012 AND 12-MAR-2012 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M-31 ACS/WFC ACCUM WFC1-CTE F435W 1 4000 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 1315.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 2 none none none 1 1315.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 3 none none none 2 1410.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 4 none none none 2 1410.0 S 12753( 8) - 22-Feb-2012 21:30:35 - [ 6] Visit: 02 Visit Requirements: AFTER 01 BY 180 D TO 210 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M-31 ACS/WFC ACCUM WFC1-CTE F435W 1 2800 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 1255.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 2 none none none 1 1255.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 3 none none none 2 1351.0 S M-31 1 ACS/WFC ACCUM WFC1-CTE F435W 4 none none none 2 1351.0 S 12753( 8) - 22-Feb-2012 21:30:35 - [ 7] Summary Form for Proposal 12753 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 180 D TO 210 D, BETWEEN 05-MAR-2012 AND 12-MAR-2012, PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M-31 ------------------------------------------------------------------------------------------------------------------------------------