Astrophysical: Gamma rays

  • News
    MAGIC telescopes detect the first gamma-rays burst at very high energies

    This ground-breaking achievement by MAGIC provides critical new insight for understanding the physical processes at work in the most powerful cosmic explosions....

  • Publication
    AGILE, Fermi, Swift, and GASP/WEBT multi-wavelength observations of the high-redshift blazar 4C +71.07 in outburst

    Context. The flat-spectrum radio quasar 4C +71.07 is a high-redshift (z = 2.172), γ-loud blazar whose optical emission is dominated by thermal radiation from...

  • Publication
    Optical Spectroscopic Survey of a Sample of Unidentified Fermi Objects: II

    We report on optical spectroscopy obtained at the 10.4 m Gran Telescopio Canarias of 28 Fermi γ-ray sources that completes the study of a sample of 60 targets...

  • Publication
    MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources

    The HAWC Collaboration released the 2HWC catalogue of TeV sources, in which 19 show no association with any known high-energy (HE; E ≳ 10 GeV) or very-high...

  • Publication
    A fast, very-high-energy γ-ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015

    The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very...

  • Publication
    Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout

    The Cherenkov Telescope Array (CTA) is the major next-generation observatory for ground-based very-high-energy gamma-ray astronomy. It will improve the...