Multiwavelength investigation of X-ray active galactic nuclei (AGN)
Abstract
In this study, we attempt to create a master catalog of active galactic nuclei (AGN) with X-rays. To do this, the catalogs HRC (Hamburg RASS Catalog) and BHRC (Byurakan Hamburg RASS Catalog) served as a basis; they were used to perform optical identification of X-ray sources from ROSAT catalogs based on low-dispersion spectra of the Hamburg Quasar Survey (HQS). The first catalog used the ROSAT Bright Source Catalogue, and in the second, ROSAT Faint Source Catalogue. As a result, we compiled a new sample of X-ray selected AGN, which collected 4401 X-ray sources with count rates of photons CR ≥ 0.04 ct/s in the area with galactic latitudes |b|≥ 30° and declinations δ ≥ 0°. All these sources are classified as AGN (3362 of them are in the 13th version of the catalog of AGN by Veron-Cetti and Veron) or are AGN candidates. For these sources, we have performed a multiwavelength investigation in several ranges of electromagnetic waves (X-ray, optical, radio). An attempt was made to find a connection between radiation fluxes in different bands for different types of sources, to reveal their characteristics, and thus to confirm the candidate AGN.
- Publication:
-
Fifty years of Cosmic Era: Real and Virtual Studies of the Sky. Conference of Young Scientists of CIS Countries
- Pub Date:
- May 2012
- Bibcode:
- 2012yscc.conf..202P