Chandra Observations of Eight Sources Discovered by INTEGRAL
John A. Tomsick (SSL/UCB), Roman Krivonos (Space Research Institute),, Qinan Wang (SSL/UCB, HKU), Arash Bodaghee (Georgia College), Sylvain Chaty, (AIM, Institut Universitaire de France), Farid Rahoui (ESO, Harvard),, Jerome Rodriguez (AIM), Francesca M. Fornasini (SSL/UCB, UCB)

TL;DR
This study used Chandra X-ray observations to identify and analyze eight hard X-ray sources discovered by INTEGRAL, revealing likely classifications and properties for three sources, including potential cataclysmic variables and an active galactic nucleus.
Contribution
First Chandra follow-up observations of eight INTEGRAL sources, providing likely identifications and spectral properties, and suggesting classifications for three sources.
Findings
Identified likely counterparts for three sources.
Classified IGR J14091-6108 and IGR J18088-2741 as probable cataclysmic variables.
Suggested IGR J18381-0924 is an active galactic nucleus.
Abstract
We report on 0.3-10 keV observations with the Chandra X-ray Observatory of eight hard X-ray sources discovered within 8 degrees of the Galactic plane by the INTEGRAL satellite. The short (5 ks) Chandra observations of the IGR source fields have yielded very likely identifications of X-ray counterparts for three of the IGR sources: IGR J14091-6108, IGR J18088-2741, and IGR J18381-0924. The first two have very hard spectra in the Chandra band that can be described by a power-law with photon indices of Gamma = 0.6+/-0.4 and -0.7(+0.4)(-0.3), respectively (90% confidence errors are given), and both have a unique near-IR counterpart consistent with the Chandra position. IGR J14091-6108 also displays a strong iron line and a relatively low X-ray luminosity, and we argue that the most likely source type is a Cataclysmic Variable (CV), although we do not completely rule out the possibility of a…
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