Monitoring Black Hole X-Ray Transients in M31 with Chandra and HST

Details Monitoring Black Hole X-Ray Transients in M31 with Chandra and HST Monitoring Black Hole X-Ray Transients in M31 with Chandra and HST

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.0104g&link_type=abstract

American Astronomical Society, HEAD meeting #10, #1.04

Astronomy and Astrophysics

Astronomy

Scientific paper

Our neighbouring galaxy M31 (Andromeda), located 780 kpc away, offers a unique opportunity to study the X-ray population of a galaxy similar to the Milky Way. We have concentrated our monitoring campaign on following the X-ray activity of the stellar-mass black hole candidates, XRNe (X-Ray Novae), in the central region of M31. Observations are made approximately once a month with Chandra, following up any bright outbursts with HST in order to identify the optical counterparts. Having measurements of the X-ray and optical luminosities, both in outburst and quiescence, allows for the estimation of a system's orbital period. In this way we have now calculated or constrained this important parameter for 9 systems and can begin comparing these values to those of the X-ray binary population in our own galaxy.

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