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AGN Populations from Optical Identification of ASCA Surveys

Published online by Cambridge University Press:  12 April 2016

Masayuki Akiyama ,
Yoshihiro Ueda  and
Kouji Ohta
Masayuki Akiyama
Affiliation:
Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI, 96720
Yoshihiro Ueda
Affiliation:
ISAS, Sagamihara, Kanagawa, 229-8510, Japan
Kouji Ohta
Affiliation:
Department of Astronomy, Kyoto University, Kyoto, 606-8502, Japan

Abstract

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To understand luminous AGNs in the z < 1 universe, the ASCA AGN samples are the best at present. Combining the identified sample of AGNs from the ASCA Large Sky Survey and Medium Sensitivity Survey, the sample of hard X-ray selected AGNs has been expanded up to 108 AGNs above a flux limit of 10-13 erg s-1 cm-2 in the 2-10 keV hard X-ray band. We discuss the fraction of absorbed AGNs in the hard X-ray selected AGN sample, and the nature of absorbed luminous AGNs.

Type
Part 3. X-ray Surveys for AGN
Information
International Astronomical Union Colloquium , Volume 184: AGN Surveys , 2002 , pp. 245 - 250
Copyright
Copyright © Astronomical Society of the Pacific 2002

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