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Similarities: GRB 940217, GBR 090926A and GRB 980923

Sacahui, J. R., González, M. M., Fraija, N., Ramirez, J. L. and Lee, W. H. (2013) Similarities: GRB 940217, GBR 090926A and GRB 980923. EAS Publications Series, 61. pp. 301-305. ISSN 1633-4760

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To link to this item DOI: 10.1051/eas/1361048

Abstract/Summary

Few GRBs clearly present distinct High-Energy (HE) component that evolve independent of the usual Band function that describes the prompt keV-emission. This component can be long or short lasting compared to the burst duration. However, most of models only explain the long duration HE component. We have developed a leptonic model on the external shock framework to describe the HE components. We propose that the short HE component that falls in the MeV regime in coincidence with the prompt phase and, the second long lasting GeV-emission could be understood as synchrotron self-Compton (SSC) emission from the reverse and forward shock respectively. This model requires a magnetized jet and a reverse shock in the thick shell case. This model already has been proven in GRB 980923 and GRB 090926A, the former with a short duration MeV-component and the latter with both long GeV- and short MeV- HE components. All fluxes, energies and durations are consistent with the observed values. Here, we apply this model to GRB 940217 that presented similarities with GRB 090926A and GRB 980923.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of the Built Environment
No Reading authors. Back catalogue items
ID Code:90547
Additional Information:Volume: Gamma-ray Bursts: 15 Years of GRB Afterglows – Progenitors, Environments and Host Galaxies from the Nearby to the Early Universe Chapter VI: Afterglow Emission-II (Theory)
Publisher:EDP Sciences

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