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In this paper, we have measured the prompt emitting regions of 44 low-luminosity and 14 short gamma-ray bursts (GRBs). According to our analysis we suspect that the short GRBs may arise from a smaller radius region based on the typical internal shock model, while the low-luminosity GRBs could be produced by the external shocks, the turbulences or the electromagnetic materials.
Astronomical observations of gamma-ray bursts can exhibit dispersive behavior where high-energy gamma rays arrive significantly later than low-energy photons. Although the underlying mechanisms for the dispersion are not fully understood, a polynomial model has been proposed for modeling the apparent frequency-dependent photon velocity. The present work considers the impact of this dispersion model...
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