Spectra and luminosities in gamma-ray bursts

Physics

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Gamma Ray Bursts, Gamma Ray Spectra, Luminosity, Radiant Flux Density, Synchrotron Radiation, Neutron Stars, Spatial Distribution, Statistical Analysis, Stellar Magnetic Fields

Scientific paper

The spatial distribution of 124 gamma-ray bursts observed by the Konus experiment is investigated statistically on the basis of published spectra. The flux intensity and the spectral parameter nu(c), equal to the Larmor frequency times the square of the electron temperature, are used as the analytical parameters, and the spectra are fitted by an optically thin thermal synchrotron of mildly relativistic electrons as proposed by Liang (1982). The spectral dependence on the angle separating the observer direction and the direction of the source magnetic field is taken into account, and the peak luminosity of the bursts is found to vary as nu(c) to the (1.3 + or - 0.3).

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