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Title: Simulation of Prompt Emission from GRBs with a Photospheric Component and its Detectability by GLAST

Abstract

The prompt emission from gamma-ray bursts (GRBs) still requires a physical explanation. Studies of time-resolved GRB spectra, observed in the keV-MeV range, show that a hybrid model consisting of two components, a photospheric and a non-thermal component, in many cases fits bright, single-pulsed bursts as well as, and in some instances even better than, the Band function. With an energy coverage from 8 keV up to 300 GeV, GLAST will give us an unprecedented opportunity to further investigate the nature of the prompt emission. In particular, it will give us the possibility to determine whether a photospheric component is the determining feature of the spectrum or not. Here we present a short study of the ability of GLAST to detect such a photospheric component in the sub-MeV range for typical bursts, using simulation tools developed within the GLAST science collaboration.

Authors:
 [1];  [2];  [3];  [4]
  1. Stockholm Observatory, AlbaNova University Center, 106 91 Stockholm (Sweden)
  2. Physics Department, Royal Institute of Technology, AlbaNova University Center, SE-106 91 Stockholm (Sweden)
  3. INFN Pisa, Largo B.Pontecorvo 3, 56100 Pisa (Italy)
  4. University and INFN of Trieste, Via Valerio 2, 34100 Trieste (Italy)
Publication Date:
OSTI Identifier:
21057319
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 906; Journal Issue: 1; Conference: Stockholm symposium on GRB's: Gamma-ray bursts prospects for GLAST, Stockholm (Sweden), 1 Sep 2006; Other Information: DOI: 10.1063/1.2737404; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COMPUTERIZED SIMULATION; COSMIC GAMMA BURSTS; COSMIC GAMMA SOURCES; GAMMA ASTRONOMY; GAMMA DETECTION; GAMMA RADIATION; GEV RANGE; KEV RANGE; MEV RANGE; PHOTON EMISSION; TELESCOPE COUNTERS; TIME RESOLUTION

Citation Formats

Battelino, Milan, Ryde, Felix, Omodei, Nicola, and Longo, Francesco. Simulation of Prompt Emission from GRBs with a Photospheric Component and its Detectability by GLAST. United States: N. p., 2007. Web. doi:10.1063/1.2737404.
Battelino, Milan, Ryde, Felix, Omodei, Nicola, & Longo, Francesco. Simulation of Prompt Emission from GRBs with a Photospheric Component and its Detectability by GLAST. United States. doi:10.1063/1.2737404.
Battelino, Milan, Ryde, Felix, Omodei, Nicola, and Longo, Francesco. Tue . "Simulation of Prompt Emission from GRBs with a Photospheric Component and its Detectability by GLAST". United States. doi:10.1063/1.2737404.
@article{osti_21057319,
title = {Simulation of Prompt Emission from GRBs with a Photospheric Component and its Detectability by GLAST},
author = {Battelino, Milan and Ryde, Felix and Omodei, Nicola and Longo, Francesco},
abstractNote = {The prompt emission from gamma-ray bursts (GRBs) still requires a physical explanation. Studies of time-resolved GRB spectra, observed in the keV-MeV range, show that a hybrid model consisting of two components, a photospheric and a non-thermal component, in many cases fits bright, single-pulsed bursts as well as, and in some instances even better than, the Band function. With an energy coverage from 8 keV up to 300 GeV, GLAST will give us an unprecedented opportunity to further investigate the nature of the prompt emission. In particular, it will give us the possibility to determine whether a photospheric component is the determining feature of the spectrum or not. Here we present a short study of the ability of GLAST to detect such a photospheric component in the sub-MeV range for typical bursts, using simulation tools developed within the GLAST science collaboration.},
doi = {10.1063/1.2737404},
journal = {AIP Conference Proceedings},
number = 1,
volume = 906,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}