Astrophysical: Gamma rays

  • Publication
    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...
  • Publication
    Spectroscopy and multiband photometry of the afterglow of intermediate duration γ-ray burst GRB 040924 and its host galaxy
    Aims: We present optical photometry and spectroscopy of the afterglow and host galaxy of gamma-ray burst GRB 040924. This GRB had a rather short duration of T90...
  • Publication
    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...
  • Publication
    Statistics of VHE γ-rays in temporal association with radio giant pulses from the Crab pulsar
    Aims: The aim of this study is to search for evidence of a common emission engine between radio giant pulses (GPs) and very-high-energy (VHE, E > 100 GeV) γ...
  • Publication
    Study of the GeV to TeV morphology of the γ Cygni SNR (G 78.2+2.1) with MAGIC and Fermi-LAT. Evidence for cosmic ray escape
    Context. Diffusive shock acceleration (DSA) is the most promising mechanism that accelerates Galactic cosmic rays (CRs) in the shocks of supernova remnants...
  • Publication
    Study of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity
    Context. Markarian 501 (Mrk 501) is a very high-energy (VHE) gamma-ray blazar located at z = 0.034, which is regularly monitored by a wide range of multi...
  • Publication
    Super-orbital variability of LS I +61°303 at TeV energies
    Context. The gamma-ray binary LS I +61°303 is a well-established source from centimeter radio up to very high energy (VHE; E> 100 GeV). The broadband emission...
  • Publication
    Systematic Search for VHE Gamma-Ray Emission from X-Ray-bright High-Frequency BL Lac Objects
    All but three (M87, BL Lac, and 3C 279) extragalactic sources detected so far at very high energy γ-rays belong to the class of high-frequency-peaked BL Lac...
  • News
    Takaaki Kajita: “The detection of gamma-rays with the CTA will be the key to discovering new sources of neutrino emission”
    The Japanese physicist Takaaki Kajita is one of the leading world experts in neutrino physics. These particles have a very tiny mass, and they hardly interact...