Abstract
The energy spectra of gamma-ray bursts differ from those of black-body radiation and are similar to the thermal bremsstrahlung spectra of optically thin plasma. This could be realized if the source is located in the outer atmosphere of a neutron star. In this case, almost one half of the emitted photons hit the surface of the star. The surface of the star is heated to a temperature of the order 107 K, and a dominant flux of X-rays with a black-body spectrum would be expected. The X-rays produced by this mechanism are detectable in the energy range from a few keV to 10 keV. This model is discussed in relation to the recent observations in the X-ray region at the time of gamma-ray bursts, and modifications of this model are also presented. The observation in this energy range will bring us valuable information on the nature of gamma-ray burst sources.
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Nishimura, J., Fujii, M. & Yamagami, T. X-ray emission associated with gamma-ray bursts. Astrophys Space Sci 93, 87–96 (1983). https://doi.org/10.1007/BF02430915
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DOI: https://doi.org/10.1007/BF02430915