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2017-01-01
Joseph, Tana D., Maccarone, Thomas J., Kraft, Ralph P., Sivakoff, Gregory Robert
In this paper we discuss the X-ray point source population of NGC 4472, an elliptical galaxy in the Virgo cluster. We used recent deep Chandra data combined with archival Chandra data to obtain a 380 ks exposure time. We find 238 X-ray point sources within 3.7 arcmin of the galaxy centre, with a...
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Deep Chandra observations of the NGC 4472 globular cluster black hole XMMU 1229397+075333: short-term variability from the first globular cluster black hole binary
Download2015-01-01
Joseph, Tana D., Maccarone, Thomas J., Kraft, Ralph P., Sivakoff, Gregory Robert
In this paper, we discuss the luminosity modulations and spectral analysis results of the recent deep observations of XMMU 122939.7+075333, the first black hole discovered in a globular cluster. The source has been detected many times, typically with LX > 1039 erg s−1, but in a 2010 observation...