Paper:	Near-Infrared Variable AGNs Derived by Cross-Identification
Volume:	442, Astronomical Data Analysis Software and Systems XX (ADASSXX)
Page:	555
Authors:	Kouzuma, S.; Yamaoka, H.
Abstract:	We examined near-infrared variability of Active Galactic Nuclei (AGNs) using cross-identification. We first cross-identified the Two Micron All Sky Survey (2MASS) catalog with two AGN catalogs (namely, Quasars and Active Galactic Nuclei (12th Ed.) and the SDSS-DR5 quasar catalog), and extracted a 2MASS counterpart for a source in the AGN catalogs. Each AGN with a 2MASS counterpart was further cross-identified with DENIS and UKIDSS catalogs. On the basis of standard deviations for magnitude difference between 2MASS/DENIS or 2MASS/UKIDSS, we extracted the sources with magnitude difference over 3σ as near-infrared variable AGNs. We discuss correlations between near-infrared variability and physical parameters (i.e., redshift, luminosity, and a near-infrared color).

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