Astrophysical: Quasars

  • Publication
    Low-resolution spectroscopy and spectral energy distributions of selected sources towards σ Orionis
    Aims: We study in detail nine sources in the direction of the young σ Orionis cluster, which is considered to be a unique site for studying stellar and...
  • News
    LST-1 telescope on La Palma detects the most distant quasar at very high energies
    The first Large-Sized Telescope (LST) prototype of the Cherenkov Telescope Array Observatory (CTAO), located at the Roque de los Muchachos Observatory (Garafía...
  • Publication
    Luminosity functions for galaxies and quasars in the Spitzer Wide-area Infrared Extragalactic Legacy Survey
    We construct rest-frame luminosity functions (LFs) at 3.6, 4.5, 5.8, 8 and 24 μm over the redshift range 0 z 2 for galaxies and 0 z 4 for optical quasi...
  • Publication
    MAGIC detection of sub-TEV emission from gravitationally lensed blazar QSO B0218+357
    The blazar QSO B0218+357 is the first gravitationally lensed blazar detected in the very high energy (VHE, E > 100 GeV) gamma-ray spectral range (Ahnen et al...
  • Publication
    MAGIC Discovery of Very High Energy Emission from the FSRQ PKS 1222+21
    Very high energy (VHE) γ-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+21 (4C 21.35, z = 0.432) was detected with the MAGIC Cherenkov...
  • Publication
    MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012
    Aims: Amongst more than fifty blazars detected in very high energy (VHE, E> 100 GeV) γ rays, only three belong to the subclass of flat spectrum radio quasars...
  • Publication
    MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011
    Aims: We study the multifrequency emission and spectral properties of the quasar3C 279 aimed at identifying the radiation processes taking place in the source...
  • Publication
    MAGIC Observations and multiwavelength properties of the quasar 3C 279 in 2007 and 2009
    Context. 3C 279, the first quasar discovered to emit VHE γ-rays by the MAGIC telescope in 2006, was reobserved by MAGIC in January 2007 during a major optical...
  • Talk
    MAGIC observations and multiwavelength properties of the quasar 3C 279 in 2007 and 2009
    3C 279, the first quasar discovered to emit VHE gamma-rays by the MAGIC telescope in 2006, was re-observed by MAGIC in January 2007 during a major optical flare...