A universal GRB photon energy-peak luminosity relation

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dc.creatorWillingale, R.
dc.creatorO'Brien, P. T.
dc.creatorGoad, M. R.
dc.creatorOsborne, J. P.
dc.creatorPage, K. L.
dc.creatorTanvir, N. R.
dc.date2007-10-19
dc.date.accessioned2026-07-07T08:37:21Z
dc.date.available2026-07-07T08:37:21Z
dc.descriptionThe energetics and emission mechanism of GRBs are not well understood. Here we demonstrate that the instantaneous peak flux or equivalent isotropic peak luminosity, L_iso ergs s^-1, rather than the integrated fluence or equivalent isotropic energy, E_iso ergs, underpins the known high-energy correlations. Using new spectral/temporal parameters calculated for 101 bursts with redshifts from BATSE, BeppoSAX, HETE-II and Swift we describe a parameter space which characterises the apparently diverse properties of the prompt emission. We show that a source frame characteristic-photon-energy/peak luminosity ratio, K_z, can be constructed which is constant within a factor of 2 for all bursts whatever their duration, spectrum, luminosity and the instrumentation used to detect them. The new parameterization embodies the Amati relation but indicates that some correlation between E_peak and E_iso follows as a direct mathematical inference from the Band function and that a simple transformation of E_iso to L_iso yields a universal high energy correlation for GRBs. The existence of K_z indicates that the mechanism responsible for the prompt emission from all GRBs is probably predominantly thermal.
dc.descriptionSubmitted to ApJ
dc.identifierhttps://arxiv.org/abs/0710.3727
dc.identifierhttp://arxiv.org/abs/0710.3727
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140374
dc.subjectAstrophysics
dc.titleA universal GRB photon energy-peak luminosity relation
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