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Hamburger Sternwarte - Research


The Bright RASS-BSC AGN sample



This page reports work in progress.

We selected all RASS-BSC X-ray sources (N=358) identified as galaxies or Active Galactic Nuclei (AGN) with B<=16.5 mag in the Hamburg/RASS Catalogue of Optical Identifications (HRC) of Zickgraf et al. 2003. A cross-correlation with the NASA Extragalactic Database was made to extract common names, classifications, and redshifts. For 35 objects own spectroscopy was obtained. Two objects currently remain without spectroscopic information.

The remaining N=356 AGN candidates are distributed among 192 confirmed AGN (z<0.2, B≤16.5), 91 quasars, 18 BL Lac objects, 45 galaxies, and 10 other sources. The galaxies are composed of absorption line galaxies and those emission line galaxies, for which no broad velocity component has been detected so far. The "other sources" contain 3 fainter (B>16.5) AGN, several stars and unidentified sources.

Except for the few stars and the unidentified sources the RASS-BSC X-ray sources were correctly identified as galaxies or AGN candidates

Finding charts are presented below:

We analyzed the spectral energy distribution of the AGN


Collaborators: D.Engels, S.Nehls, et al.


Last changed  Thursday, 26-August-2004 | D.Engels, A.Mertz