X-ray emitting AGN unveiled by the Chandra Multiwavelength Project
Abstract
We present an X-ray and optical analysis of a 2-8 keV flux limited (fx > 10e-14 erg s^-1 cm^-2) sample of 126 AGN detected in 16 Chandra fields. This work represents a small though significant subset of the Chandra Multiwavelength Project (ChaMP). We have chosen this limiting flux to have a reasonable degree of completeness (50%) in our optical spectroscopic identifications. The optical counterparts of these AGN are characterized as either broad emission line AGN (BLAGN; 67%), narrow emission line galaxies (NELG; 22%) or absorption line galaxies (ALG; 11%) without any evidence of an AGN signature. Based on their X-ray luminosity and spectral properties, we show that NELG and ALG are primarily the hosts of obscured AGN with an intrinsic absorbing column in the range of 10^21.5<NH<10^23.3 cm^-2. While most of the BLAGN are unobscured, there are a few with substantial absorption. X-ray surveys such as the ChaMP nicely complement the SDSS to determine the demographics of the AGN population.
Keywords
Cite
@article{arxiv.astro-ph/0310907,
title = {X-ray emitting AGN unveiled by the Chandra Multiwavelength Project},
author = {John D. Silverman and Paul J. Green and Thomas L. Aldcroft and Dong-Woo Kim and Wayne Barkhouse and Robert A. Cameron and Belinda J. Wilkes},
journal= {arXiv preprint arXiv:astro-ph/0310907},
year = {2007}
}
Comments
4 pages; to appear in AGN Physics with the Sloan Digital Sky Survey (July 2003; Princeton, NJ), eds. G.T. Richards and P.B. Hall