Title:	Neutrino spectra from low and high luminosity populations of gamma ray bursts
Authors:	Gupta, Nayantara Zhang, Bing
Issue Date:	Jun-2007
Publisher:	Elsevier B.V.
Citation:	Astroparticle Physics, 2007, Vol.27, p386
Abstract:	The detection of GRB 060218 at z=0.033 by Swift within 1.5 years of operation, together with the detection of GRB 980425 at z=0.0085 by BeppoSAX, suggest that these low luminosity (LL) GRBs have a much higher event rate than the canonical high luminosity (HL) GRBs, and they form a distinct new component in the GRB luminosity function. We explore the contribution of this previously neglected GRB population to the diffuse neutrino background within the internal shock model and compare it with that of the canonical HL population. By considering a wide range of distributions of various parameters (e.g. luminosity, spectral break energy, duration, variability time, Lorentz factor, redshift) for both populations, we find that although it is difficult to detect neutrinos from the individual LL GRBs, the contribution of the LL population to the diffuse neutrino background is more than the HL population above about 108 GeV.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/4467
ISSN:	0927-6505
Alternative Location:	http://adsabs.harvard.edu/abs/2007APh....27..386G http://arxiv.org/abs/astro-ph/0606744 http://dx.doi.org/10.1016/j.astropartphys.2007.01.004
Copyright:	2007 Elsevier B.V.
Appears in Collections:	Research Papers (A&A)

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