Black Hole X-ray Novae in M31

Details Black Hole X-ray Novae in M31 Black Hole X-ray Novae in M31

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2726m&link_type=abstract

Chandra proposal ID #10620040

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Scientific paper

During A01-9 we found ~20 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST follow-up have estimated orbital periods for 9 of these. Observations are underway with HST to attempt to estimate additional periods. We propose to continue this program, both concentrating our scarce HST resources on a single transient which exceeds typical NS outburst luminosity. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated 790ks (ACIS+HRC) near the M31 bulge, and total Chandra exposure on M31 is now 940ks. By continuing our monitoring program through AO10 we will reach ~890ks on the bulge and >1Msec total Chandra M31 exposure.

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