NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-24 T16:21:27 PDT
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For refcode 2006ApJ...636L..65B:
Retrieve 60 NED objects in this reference.
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2006ApJ...636L..65B INTEGRAL IBIS Extragalactic Survey: Active Galactic Nuclei Selected at 20 -- 100 keV L. Bassani, M. Molina, A. Malizia, J. B. Stephen, A. J. Bird, A. Bazzano, G. Belanger, A. J. Dean, A. De Rosa, P. Laurent, F. Lebrun, P. Ubertini, and R. Walter Abstract. Analysis of International Gamma-Ray Astrophysics Laboratory (INTEGRAL) Core Programme and public open-time observations performed up to 2005 April provides a sample of 62 active galactic nuclei in the 20 -- 100 keV band above a flux limit of ~1.5x10^-11^ ergs cm^-2^ s^-1^. Most (42) of the sources in the sample are Seyfert galaxies, almost equally divided between type 1 and type 2 objects; six are blazars, and 14 are still unclassified. Excluding the blazars, the average redshift of our sample is 0.021, while the mean luminosity is logL=43.45. We find that absorption is present in 65% of the objects, with 14% of the total sample due to Compton-thick active galaxies. In agreement with both Swift BAT team results and 2 -- 10 keV studies, the fraction of absorbed objects decreases with the 20 -- 100 keV luminosity. All Seyfert 2's in our sample are absorbed, as are 33% of Seyfert 1's. The present data highlight the capability of INTEGRAL to probe the extragalactic gamma-ray sky and to find new and/or absorbed active galaxies. Key words: Galaxies: Active, Gamma Rays: Observations, Surveys
Retrieve 60 NED objects in this reference.
Please click here for ADS abstract

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