Astrophysical: Blazars

  • Publication
    Analysis of spectropolarimetric observations of OJ 287.
    During the OJ-94 campaign the authors got spectropolarimetric observations of OJ 287. Although the polarization was very low (
  • Publication
    Are the extended narrow line regions in AGN photoionized by the emission from thick accretion disks?
    We study the photoionization of the Extended Narrow Line Region (ENLR) using three anisotropic radiation fields: (1) a geometrically thick accretion disk; (2) a...
  • News
    Astronomers discover rapid oscillations in the light of a blazar
    The international collaboration Whole Earth Blazar Telescope (WEBT), in which researchers from the Instituto de Astrofísica de Canarias (IAC) participate, has...
  • Publication
    Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data
    We present the first Fermi Large Area Telescope (LAT) catalog of long-term γ-ray transient sources (1FLT). This comprises sources that were detected on monthly...
  • Publication
    Confirmation of the 12-year optical outburst cycle in blazar OJ 287.
    A large monitoring project, OJ-94, was set up with the aim of monitoring the blazar OJ 287 during the predicted optical outburst (in fall 1994, Sillanpaa et al...
  • Publication
    Double-peak structure in the cyclic optical outbursts of blazar OJ 287.
    An international monitoring project, called OJ-94, was set up with the aim of monitoring blazar OJ 287 during the predicted optical outburst (in fall 1994...
  • Publication
    Intermediate-resolution spectropolarimetry of a small sample of quasars
    We present spectropolarimetric observations of a sample of three quasars selected because of their very different broad-band polarization properties. All of the...
  • Publication
    Investigating the Blazar TXS 0506+056 through Sharp Multiwavelength Eyes During 2017-2019
    The blazar TXS 0506+056 got into the spotlight of the astrophysical community in 2017 September, when a high-energy neutrino detected by IceCube (IceCube...
  • News
    La Palma telescopes participate in the discovery of a young blazar produced by the merger of two galaxies
    An international team of scientists has obtained the first unequivocal detection of a very high speed jet of matter emitted by a galaxy in the process of...