Journal or Publication Title:
Date of publication:
Volume:
Number:
ISSN:
Title:
Classification of Blazars by Activity Types
Creator:
Abrahamyan, H. V. ; Mickaelian, A. M.
Subject:
Astrometry ; Space Sciences ; Archaeoastronomy and Astronomy in Culture
Uncontrolled Keywords:
blazar ; quasar ; active galactic nuclei ; optical spectral classification ; activity types ; BL Lacobjects ; Flat Spectrum Radio Quasars
Coverage:
Abstract:
We have carried out a spectral classification by the Activity Types for all sample of Blazars from the BZCAT v.5 Catalogue, namely the BZB, BZG, BZQ and BZU type objects. The classification is based on the Sloan Digital Sky Survey (SDSS) homogeneous medium-resolution optical spectroscopy and along with the standard BPT-type diagnostic diagrams, we have applied our newly introduced fine classification scheme with subtypes of AGN and considering many more features. Out of 3561 BZCAT objects, 1363 (38.3 %) having SDSS spectra were classified. After the new classification, 749 (54.9 %) of 1363 objects have changed their optical class.