Astrophysical: Gamma rays

  • Publication
    The dark nature of GRB 051022 and its host galaxy
    Aims:We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 h and 1.15 yr after the event. It is the most...
  • Talk
    The Extragalactic Background Light: Connecting Classical and High Energy Astronomy
    The extragalactic background light (EBL) is the second most energetic diffuse background that fills our Universe. It is produced by star formation processes and...
  • Publication
    The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy
    Broad-band optical observations of the extraordinarily bright optical afterglow of the intense gamma-ray burst GRB 991208 started ~2.1 days after the event and...
  • Talk
    The Fermi GeV excess: status and perspectives
    In this presentation, I will review the history and literature debate about the anomalous gamma-ray emission detected towards the inner Galaxy by the Fermi-LAT...
  • Publication
    The Gamma-Ray Bright BL Lacertae Object RX J1211+2242
    RX J1211+2242 is an optically faint (B~=19.2mag) but X-ray bright (f2-10keV=5×10-12ergscm-2s-1) active galactic nucleus (AGN) that has been shown to be a BL Lac...
  • Publication
    The GRB 060218/SN 2006aj event in the context of other gamma-ray burst supernovae
    The supernova SN 2006aj associated with GRB 060218 is the second-closest GRB-SN observed to date (z=0.033). We present Very Large Telescope, Liverpool Telescope...
  • Publication
    The HETE-2 satellite: detection of Gamma-Ray Bursts and other transient phenomena
    HETE-2 (High Energy Transient Explorer) is a small scientific satellite whose main task is to detect Gamma-Ray Bursts, promptly determine their coordinates...
  • Publication
    The June 2008 Flare of Markarian 421 from Optical to TeV Energies
    We present optical, X-ray, high-energy (lap30 GeV) and very high energy (gap100 GeV; VHE) observations of the high-frequency peaked blazar Mrk 421 taken between...
  • News
    The LST-1 telescope on La Palma detects the Crab Pulsar at very high-energy
    The first prototype of the Large-Size Telescope (LST) of the Cherenkov Telescope Array (CTA), the LST-1, located at the Roque de los Muchachos Observatory...