Astrophysical: Gamma rays

  • Publication
    Gamma-ray line emission from OB associations and young open clusters. I. Evolutionary synthesis models
    We have developed a new diagnostic tool for the study of gamma-ray emission lines from radioactive isotopes (such as 26Al and 60Fe) in conjunction with other...
  • Publication
    Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
    MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst from 2018...
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    Gamma-ray observations of the Crab Nebula at TeV energies
    A new series of observation of the Crab Nebula in TeV gamma rays using an improved camera on the Whipple Observatory 10 m Optical Reflector is reported. The...
  • Publication
    Gas and dust properties in the afterglow spectra of GRB 050730
    We present early WHT ISIS optical spectroscopy of the afterglow of gamma-ray burst GRB 050730. The spectrum shows a DLA system with the highest measured...
  • Publication
    GRB 011121: A Collimated Outflow into Wind-blown Surroundings
    We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the...
  • Publication
    GRB 050713A: High-Energy Observations of the Gamma-Ray Burst Prompt and Afterglow Emission
    Swift discovered GRB 050713A and slewed promptly to begin observing with its narrow-field instruments 72.6 s after the burst onset, while the prompt gamma-ray...
  • Publication
    GRB 050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang
    We present optical and near-infrared observations of the afterglow of the gamma-ray burst GRB 050904. We derive a photometric redshift z = 6.3, estimated from...
  • Publication
    GRB 051028: an intrinsically faint gamma-ray burst at high redshift?
    Aims.We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to...
  • Publication
    GRB 060121: Implications of a Short-/Intermediate-Duration γ-Ray Burst at High Redshift
    Since the discovery of the first short-population γ-ray burst (GRB) afterglows in 2005, the handful of observed events have been found to be embedded in nearby...