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Paper: AGN Populations from Optical Identification of ASCA Surveys
Volume: 284, AGN Surveys, IAU Colloquium 184
Page: 245
Authors: Akiyama, Masayuki; Ueda, Y.; Ohta, K.
Abstract: In this paper, properties of AGNs obtained from optical identification of ASCA surveys are discussed. To understand luminous AGNs in the z < 1 universe, the ASCA AGN samples are still better than samples of AGNs from deep Chandra or XMM-Newton surveys. Combining the identified sample of AGNs from ASCA Large Sky Survey and Medium Sensitivity Survey, the sample of hard X-ray selected AGNs have been expanded up to 80 AGNs above the flux limit of 10-13 erg s-1 cm-2 in the 2-10 keV hard X-ray band. One fifth of the ASCA AGNs are absorbed narrow-line AGNs. The luminosity distribution of the absorbed AGNs is limited below 1045 erg s-1, though there are 14 non-absorbed broad-line AGNs detected above the luminosity. The result suggests lack of absorbed luminous AGNs (deficiency of type-2 QSO).
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