Continued M31 Monitoring for Black Hole X-ray Nova

Details Continued M31 Monitoring for Black Hole X-ray Nova Continued M31 Monitoring for Black Hole X-ray Nova

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11338g&link_type=abstract

HST Proposal ID #11338. Cycle 16

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Scientific paper

During A01-7 we found >16 Black Hole X-ray Novae BHXN in M31 using Chandra, and with HST followup have estimated orbital periods for 6 of these. Observations are underway with HST to attempt to estimate additional periods. We propose to continue this program, concentrating our scarce HST resources on a single transient which exceeds the NS Eddington limit. Only uninterrupted monitoring can yield the duty cycles and long-term lightcurves of BHXN and other variables in M31. Our GO+GTO programs have accumulated 300ks ACIS near the M31 bulge, and total ACIS exposure on M31 is now 620ks. Our monitoring program alone can amass 500ks on the bulge if continued through AO12, and combined with other programs will reach >1Msec ACIS exposure on the bulge.;

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