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VERONCAT Catalog

This database table contains the 13th edition of the Catalog of Quasars and Active Galactic Nuclei by Veron-Cetty and Veron, and is an update of the previous versions. As in the previous editions, no information about absorption lines or X-ray properties is given, but absolute magnitides are provided, assuming a Hubble constant H0 = 71 km/s/Mpc and a deceleration parameter q0 = 0 (notice the change of cosmology from previous editions in which H0 was assumed to be 50 km/s/Mpc).

The present edition of this catalog contains 133336 quasars, 1374 BL Lac objects and 34231 active galaxies (including 15627 Seyfert 1 galaxies), for a grand total of 168941 objects, significantly more than the number of objects listed in the 12th edition (108080).

The 13th edition includes positions and redshifts, as well as photometry (U, B, and V) and 6-cm and 20-cm flux densities, when available. 178 objects once proposed but now rejected as quasars are NOT included in the online version of this catalog: their names and positions are listed in the file https://cdsarc.cds.unistra.fr/ftp/cats/VII/258/reject.dat. This HEASARC table also does NOT contain the additional information on gravitationally lensed quasars and quasar pairs listed in Tables 3 and 4 of the published paper: these tables are available in electronic form at the CDS https://cdsarc.cds.unistra.fr/ftp/cats/VII/248/ files table2.dat and table3.dat (sic).

The present edition of this catalog contains quasars with measured redshift known prior to July 1st, 2009.

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