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X-ray selected Narrow-Line Seyfert 1 Galaxies

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arxiv 1105.5234 v1 pith:FN544WRY submitted 2011-05-26 astro-ph.CO

X-ray selected Narrow-Line Seyfert 1 Galaxies

A. Caccianiga , P. Severgnini , R. Della Ceca , A. Corral , R. Fanali , E. Marchese This is my paper
classification astro-ph.CO
keywords seyfertx-rayagnsblack-holeclasseseddingtongalaxiesmass
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We present and discuss the properties of a complete and well defined sample of X-ray selected type 1 AGNs including 26 Narrow-Line Seyfert 1 and 129 Broad-Line Seyfert 1 galaxies derived from the XMM-Newton Bright Serendipitous Survey (XBS). We study the differences between the two classes of AGNs for what concerns the X-ray properties (the photon-index) and the main physical parameters, like the Black-Hole mass and the Eddington ratio. We then consider the two classes together and look for statistical correlations between observed and physical parameters. We find a significant dependence of the photon-index with the Eddington ratio and a weaker (possibly secondary) correlation between the photon index and the Black-Hole Mass.

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