Astrophysical: Blazars

  • Publication
    The broad band energy distribution of the misaligned gamma-ray blazar PKS 0521-365
    Simultaneous UV and X-ray observations of the blazar PKS 0521-365 are combined with radio, IR, optical and gamma-ray data taken at different epochs to study the...
  • Publication
    The connection between the low polarization quasar 3C 273 and blazars
    Photopolarimetric observations in UBVRI bands and near-infrared photometric observations of the low polarization quasar 3C 273 obtained between February 1989...
  • Publication
    The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3
    An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope is presented. This version (4LAC-DR3)...
  • News
    The Gran Telescopio Canarias finds the farthest black hole that belongs to a rare family of galaxies
    An international team of astronomers has identified one of the rarest known classes of gamma-ray emitting galaxies, called BL Lacertae, within the first 2...
  • Publication
    The light curve of 3C 66A.
    During the OJ-94 campaign one monitored the blazar 3C 66A as a secondary target. Here the authors present the observed V-band light curve. This blazar was in...
  • Publication
    The light curve of OJ 287.
    During the OJ-94 campaign for the blazar OJ 287 the authors have obtained the best ever observed optical light curve for any extragalactic object. They have...
  • Publication
    The optical, infrared and radio light curve of OJ 287 during winter 1993 - 94.
    The light curves of OJ 287 at UBVRIJHK, 22 and 37 GHz are presented for the 1993/94 observing campaign. Despite the considerable optical and infrared activity...
  • Publication
    The variability characteristics of the OJ 287 database.
    The authors present preliminary results of the study of short-term variability of the BL Lac object OJ 287. There is evidence that the variability amplitude of...
  • Publication
    Unraveling the Complex Behavior of Mrk 421 with Simultaneous X-Ray and VHE Observations during an Extreme Flaring Activity in 2013 April
    We report on a multiband variability and correlation study of the TeV blazar Mrk 421 during an exceptional flaring activity observed from 2013 April 11 to 19...