Modeling GeV to very high energy emission from long GRBs

Jagdish C. Joshi, Soebur Razzaque

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Gamma-ray bursts (GRBs) are energetic, transient explosions, which indicate either the death of a massive star (≥ 25M⊙) or the merger of two compact object. In the current understanding, collapsar based GRBs stay active for a long duration (T90 > 2s), and merger based GRBs last for a very short duration (T90 < 2s), T90 is the time over which gamma-ray burst emits 90 % of its total measured fluence. A clear understanding of GRB emission can reveal the nature of the central source and the composition of the relativistic jet. Fermi-LAT observations of GRBs have detected a significant power-law component in the energy range MeV to tens of GeV, in short as well as in long GRBs. The explanation of its origin is still not understood. In this work we have discussed a plausible origin of this component, in the case for long GRBs.

Original languageEnglish
Article number003
JournalProceedings of Science
Publication statusPublished - 2016
Event4th Annual Conference on High Energy Astrophysics in Southern Africa, HEASA 2016 - Cape Town, South Africa
Duration: 13 Jan 2016 → …

ASJC Scopus subject areas

  • Multidisciplinary


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