Astrofísicas: Objetos BL Lacertae

  • 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...
  • Publicación
    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...
  • Publicación
    Simultaneous Multiwavelength Observations of the Blazar 1ES 1959+650 at a Low TeV Flux
    We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed in 2006 May. Data from the optical, UV, soft- and hard-X-ray...
  • Publicación
    Spectral Energy Distribution of Markarian 501: Quiescent State Versus Extreme Outburst
    The very high energy (VHE; E > 100 GeV) blazar Markarian 501 (Mrk 501) has a well-studied history of extreme spectral variability and is an excellent laboratory...
  • Publicación
    Spectral energy distribution of Palomar-Green BL Lacertae objects.
    Optical spectroscopy of three recently discovered BL Lacs (PG 1246+586, PG 1424+240 and PG 1437+398) in the Palomar-Green optical survey is presented. The three...
  • Publicación
    Spectroscopy of 10 γ-Ray BL Lac Objects at High Redshift
    We present optical spectra with high signal-to-noise ratio of 10 BL Lac objects detected at GeV energies by the Fermi satellite (3FGL catalog), which previous...
  • Publicación
    Statistical redshift of the very-high-energy blazar S5 0716+714
    Context. Blazars are the most numerous class of very-high-energy (VHE; E > 100 GeV) gamma-ray emitters. At present, measured redshifts are available only for...