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The prompt high-energy gamma-ray emission from GRBs: Predictions for GLAST

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Abstract

We compute the prompt high-energy gamma-ray emission from GRBs in the framework of the internal shock model [1]. The dynamics of the internal shock phase is followed using a simple model where the relativistic outflow is discretized in a large number of shells that interact by direct collisions. The emission in the comoving frame of each shocked shell is computed using a code that solves the time evolution of the photon and electron populations and includes all relevant radiative processes (synchrotron, synchrotron self-absorption, inverse Compton, photon-photon annihilation and pair production). The contributions of all shells are then added to construct the observed GRB. Lightcurves are computed in different spectral bands (low and high-energy gamma-rays) and the observed photon spectrum at different times is also produced. We present our first results and discuss them in the prospect of future GLAST observations.

Original languageEnglish
Title of host publicationGamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference
Pages389-392
Number of pages4
DOIs
Publication statusPublished - 1 Dec 2008
Externally publishedYes
EventSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007 - Santa Fe, NM, United States
Duration: 5 Nov 20079 Nov 2007

Publication series

NameAIP Conference Proceedings
Volume1000
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007
Country/TerritoryUnited States
CitySanta Fe, NM
Period5/11/079/11/07

Keywords

  • Gamma-ray bursts
  • Hydrodynamics
  • Radiation mechanisms
  • Relativity

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