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A VO study of SDSS AGNs with X-ray emission from ROSAT-PSPC pointed observations

Published online by Cambridge University Press:  01 August 2006

Robert J. Hanisch
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive,Baltimore, MD21218, USA email: hanisch@stsci.edu
Anatoly A. Suchkov
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD21218, USA
Timothy M. Heckman
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD21218, USA
Wolfgang H. Voges
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße 1, D-85748 Garching, Germany
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We use VO facilities to study AGNs with X-ray emission. We present a sample of 1744 of Type 1 AGNs from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) spectroscopic catalog with X-ray counterparts in the White-Giommi-Angelini catalogue (WGACAT) of ROSAT-pspc pointed observations. Of 1744 X-ray sources, 1410 (80.9%) are new AGN identifications. Of 4,574 SDSS DR4 AGNs for which we found radio matches in the catalogue of radio sources from the Faint Images of the Radio Sky at Twenty (FIRST) cm survey, 224 turned up in our sample of SDSS X-ray AGN.

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Contributed Papers
Copyright
Copyright © International Astronomical Union 2007
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