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

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2260m&link_type=abstract

Chandra Proposal ID #08620043

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Chandra Proposal Id #08620043

Scientific paper

During A01-6 we found >12 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST followup have estimated orbital periods for 6 of these. Our AO7 program plans to double this number in order to yield a statistically meaningful orbital period distribution. 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 574ks (ACIS+HRC) near the M31 bulge, and total Chandra exposure on M31 is now 814ks. By continuing our monitoring program through AO10 we will reach ~750ks on the bulge and >1Msec total Chandra M31 exposure.

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