Black Hole X-ray Novae in M31

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

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2471m&link_type=abstract

Chandra Proposal ID #09620024

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Chandra Proposal Id #09620024

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,mboth 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 590ks (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 ~750ks on the bulge and >1Msec total Chandra M31 exposure.

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