Monitoring M31 for BHXNe

Details Monitoring M31 for BHXNe Monitoring M31 for BHXNe

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11833g&link_type=abstract

HST Proposal ID #11833. Cycle 17

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Scientific paper

During A01-8 we found 20 Black Hole X-ray Novae {BHXNe} in M31 using Chandra, and with HST follow-up have estimated orbital periods for 8 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 1e38 erg/s. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXNe {and other variables} in M31. Our GO+GTO programs will have accumulated 790ks {ACIS+HRC} near the M31 bulge by the end of AO9, and total Chandra exposure on M31 is now 940ks. By continuing our monitoring program through AO12 we will reach 950ks on the bulge and >1Msec total Chandra M31 exposure.;

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