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Radio Properties of AGN

Published online by Cambridge University Press:  25 July 2014

Hayk V. Abrahamyan  and
Areg M. Mickaelian
Hayk V. Abrahamyan
Affiliation:
Byurakan Astrophysical Observatory (BAO), Armenia Email: abrahamyanhayk@gmail.com, aregmick@yahoo.com
Areg M. Mickaelian
Affiliation:
Byurakan Astrophysical Observatory (BAO), Armenia Email: abrahamyanhayk@gmail.com, aregmick@yahoo.com
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Abstract

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To study the radio properties of AGN, we cross-correlate and investigate Veron-Cetty & Veron catalog of QSOs and Active Galaxies (v.13, 2010) with a number of radio catalogs: NVSS, FIRST, GB6, 87GB, SUMSS, WISH, WENSS, and 7C. This catalog contains 168,940 objects with positional accuracy of mostly 1 arcsec, though many positions have larger errors. We use new cross-correlation software based on accuracy of each object independently. In this software we take into account errors for each source and take identifications with errors within 3 sigma. Altogether, we find ~16,000 AGN having radio detection in any of the listed catalogs. Using all data from radio catalogs, we derive a homogeneous sample of radio AGN. The sample allows accomplish several tasks, including study of the distribution of radio sources by activity types, differences in physical properties of radio-loud and radio-quiet AGN, luminosity functions for various types of radio AGN, study of the q parameter by AGN types and its evolution, etc.

Keywords

radio catalogscross-correlationsNVSSFIRSTQSOblazarsAGN
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 102 - 103
Copyright
Copyright © International Astronomical Union 2014 

References

Ahn, C. P., Alexandroff, R., Allende Prieto, C., et al. 2013, ApJS, in press.Google Scholar
Becker, R. H., Helfand, D. J., White, R. L., et al. 2012, ApJ 475, 479 (1997), Vizier online version 2012Feb16Google Scholar
Condon, J. J., Cotton, W. D., Greisen, E. W., et al. 1998, AJ 115 1693Google Scholar
Cutri, R. M., Wright, E. L., Conrow, T., et al. 2012, WISE All-Sky Data Release, IPAC/Caltech, VizieR On-line Data Catalog II/311Google Scholar
De Breuck, C., Tang, Y., de Bruyn, A. G., et al. 2002, A&A 394, 59, Vizier online catalog VIII/69Google Scholar
de Bruyn, G., Miley, G., Rengelink, R., et al. 2000, NFRA/ASTRON and Leiden Observatory, Vizier online catalog VIII/62Google Scholar
Gregory, P. C. & Condon, J. J. 1991, ApJS 75 1011CrossRefGoogle Scholar
Gregory, P. C., Scott, W. K., Douglas, K., & Condon, J. J. 1996, ApJS 103 427Google Scholar
Hales, S. E. G., Riley, J. M., Waldram, E. M., et al. 2007, MNRAS 382 1639CrossRefGoogle Scholar
Massaro, E., Giommi, P., Leto, C., et al. 2009, A&A 495 691Google Scholar
Mauch, T., Murphy, T., Buttery, H. J., et al. 2003, MNRAS 342 1117Google Scholar
McMahon, R. G., Irwin, M. J., & Maddox, S. J., 2000, IoA, Cambridge, UKGoogle Scholar
Veron-Cetty, M. P. & Veron, P. 2010, A&A 518 A10Google Scholar