Astrofísicas: Objetos BL Lacertae

  • Publicación
    Optical spectroscopy of blazars for the Cherenkov Telescope Array - II
    Active galactic nuclei (AGNs) make up about 35 per cent of the more than 250 sources detected in very high-energy (VHE) gamma rays to date with the imaging...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...
  • Publicación
    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...