Large homogeneous sample of X-ray selected AGN and its study

The combined catalogue of AGN selected from optical identifications of X-ray sources based on Hamburg-ROSAT and Byurakan-Hamburg-ROSAT catalogues is a homogeneous sample for statistical studies. Optically identified X-ray sources from ROSAT BSC and FSC are included, 4253 X-ray selected AGN in total. We carried out classification for 210 of these candidate sources based on available SDSS spectra and enlarged the sample of confirmed AGN. Statistical investigations of the sample were also carried out. Multiwavelength SEDs have also been constructed to link them to classifications.