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arXiv · 0803.2565

The Brightest Serendipitous X-ray Sources in ChaMPlane

Kyle Penner·Maureen van den Berg·JaeSub Hong·Silas Laycock·Ping Zhao·Jonathan Grindlay
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Abstract

The Chandra Multiwavelength Plane (ChaMPlane) Survey is a comprehensive effort to constrain the population of accretion-powered and coronal low-luminosity X-ray sources (L_X < 10^33 erg s^-1) in the Galaxy. ChaMPlane incorporates X-ray, optical, and infrared observations of fields in the Galactic Plane imaged with Chandra in the past six years. We present the results of a population study of the brightest X-ray sources in ChaMPlane. We use X-ray spectral fitting, X-ray lightcurve analysis, and optical photometry of candidate counterparts to determine the properties of 21 sources. Our sample includes a previously unreported quiescent low-mass X-ray binary or cataclysmic variable (R = 20.9) and ten stellar sources (12.5 < R < 15), including one flare star (R = 17.3). We find that quantile analysis, a new technique developed for constraining the X-ray spectral properties of low-count sources, is largely consistent with spectral fitting.

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Kyle Penner, Maureen van den Berg, JaeSub Hong, Silas Laycock, Ping Zhao, Jonathan Grindlay. 2008-03-18. The Brightest Serendipitous X-ray Sources in ChaMPlane. https://arxiv.org/abs/0803.2565

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