Astrophysical: BL Lacertae objects

  • Publication
    Optical spectroscopy of blazars for the Cherenkov Telescope Array - III
    Context. Blazars, which include BL Lacs and flat-spectrum radio quasars, represent the brightest persistent extragalactic sources in the high-energy (HE; 10 MeV...
  • Publication
    Optical variability of the blazar 3C 371: From minute to year timescales
    Context. The BL Lac object 3C 371 was observed by the Transiting Exoplanet Survey Satellite (TESS) for approximately a year, between July 2019 and July 2020...
  • Publication
    PG 1553+113: Five Years of Observations with MAGIC
    We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100 GeV). Power-law...
  • Publication
    Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources
    Spectral energy distributions (SEDs) and radio continuum spectra are presented for a northern sample of 104 extragalactic radio sources, based on the Planck...
  • Publication
    Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    PG 1553+113 is a very high energy (VHE, E > 100 GeV) γ-ray emitter classified as a BL Lac object. Its redshift is constrained by intergalactic absorption lines...
  • Publication
    Quasi-periodic behaviour in the optical and γ-ray light curves of blazars 3C 66A and B2 1633+38
    We report on quasi-periodic variability found in two blazars included in the Steward Observatory Blazar Monitoring data sample: the BL Lac object 3C 66A and the...
  • Publication
    Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008
    The blazar PG 1553+113 is a well known TeV γ-ray emitter. In this paper we determine its spectral energy distribution through simultaneous multi-frequency data...
  • Publication
    Simultaneous Multiwavelength Observation of Mkn 501 in a Low State in 2006
    We present results of the multiwavelength campaign on the TeV blazar Mkn 501 performed in 2006 July, including MAGIC for the very-high-energy (VHE) γ-ray band...
  • Publication
    Simultaneous Multiwavelength Observations of Markarian 421 During Outburst
    We report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These...