Optical spectroscopic identification of the nature of 21 unidentified southern hard X–ray objects is reported here in the framework of our campaign aimed at determining the nature of newly-discovered and/or unidentified sources detected by INTEGRAL. Our results show that 12 of these objects are Active Galactic Nuclei (AGNs), 5 are magnetic Cataclysmic Variables (CVs), and 4 are High-Mass X–ray Binaries (HMXBs), one of which is in the Large Magellanic Cloud. These identifications further underscore the importance of INTEGRAL in the study of the hard X–ray spectrum of AGNs, HMXBs and CVs, and the usefulness of a strategy of catalogues crosscorrelation plus optical spectroscopy to unveil the nature of the X–ray sources detected with INTEGRAL.
New Results on Optical Identifications of INTEGRAL Sources
MORELLI, LORENZO;
2007
Abstract
Optical spectroscopic identification of the nature of 21 unidentified southern hard X–ray objects is reported here in the framework of our campaign aimed at determining the nature of newly-discovered and/or unidentified sources detected by INTEGRAL. Our results show that 12 of these objects are Active Galactic Nuclei (AGNs), 5 are magnetic Cataclysmic Variables (CVs), and 4 are High-Mass X–ray Binaries (HMXBs), one of which is in the Large Magellanic Cloud. These identifications further underscore the importance of INTEGRAL in the study of the hard X–ray spectrum of AGNs, HMXBs and CVs, and the usefulness of a strategy of catalogues crosscorrelation plus optical spectroscopy to unveil the nature of the X–ray sources detected with INTEGRAL.Pubblicazioni consigliate
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