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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4474
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dc.contributor.authorGupta, Nayantara-
dc.contributor.authorZhang, Bing-
dc.date.accessioned2012-05-08T04:51:28Z-
dc.date.available2012-05-08T04:51:28Z-
dc.date.issued2008-02-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2008, Vol.384, pL11en
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/4474-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractThe site and mechanism of gamma-ray burst (GRB) prompt emission is still unknown. Although internal shocks have been widely discussed as the emission site of GRBs, evidence supporting other emission sites, including the closer-in photosphere where the fireball becomes transparent and further-out radii near the fireball deceleration radius where magnetic dissipation may be important, have been also suggested recently. With the successful operation of the GLAST experiment, prompt high-energy emission spectra from many GRBs would be detected in the near future. We suggest that the cut-off energy of the prompt emission spectrum from a GRB depends on both the fireball bulk Lorentz factor and the unknown emission radius from the central engine. If the bulk Lorentz factor could be independently measured (e.g. from early afterglow observations), the observed spectral cut-off energy can be used to diagnose the emission site of gamma-rays. This would provide valuable information to understand the physical origin of GRB prompt emission.en
dc.language.isoenen
dc.publisherRoyal Astronomical Societyen
dc.relation.urihttp://adsabs.harvard.edu/abs/2008MNRAS.384L..11Gen
dc.relation.urihttp://arxiv.org/abs/0708.2763en
dc.relation.urihttp://dx.doi.org/10.1111/j.1745-3933.2007.00411.xen
dc.rights2008 Royal Astronomical Societyen
dc.subjectgamma-rays: burstsen
dc.subjectgamma-rays: observationsen
dc.subjectgamma-rays: theoryen
dc.titleDiagnosing the site of gamma-ray burst prompt emission with spectral cut-off energyen
dc.typeArticleen
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