2001/01/03 by Masayuki Akiyama, Akiyama, Masayuki
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0101051
6 pages with 3 figures, to appear in the proceeding of "X-ray Astronomy 2000" (Palermo, 4-9 Sep. 2000)
openalex publication_date 2001/01/03 · arxiv created 2001/01/04 · arxiv updated 2009/12/01 · openalex created_date 2020/01/10 · openalex updated_date 2026/07/28
In this paper, results of optical identification of ASCA surveys are\nsummarized. To understand luminous AGNs in the z<1 universe, the ASCA AGN\nsample is still better than samples of AGNs from deep Chandra or XMM-Newton\nsurveys. Combining the identified sample of AGNs from ASCA Large Sky Survey and\nMedium Sensitivity Survey, the sample of hard X-ray selected AGNs have been\nexpanded up to about 80 AGNs above the flux limit of 10-13 erg s-1\ncm-2 in the 2-10keV band. One fifth of the ASCA AGNs are absorbed\nnarrow-line AGNs. The luminosity distribution of the absorbed AGNs is limited\nbelow 1045 erg s-1, though there are 14 non-absorbed broad-line AGNs are\ndetected above the luminosity. The result suggests lack of absorbed luminous\nAGNs (deficiency of type 2 QSO).\n