GRBs in the SWIFT and Fermi era: a new view of the prompt emission

Details GRBs in the SWIFT and Fermi era: a new view of the prompt emission GRBs in the SWIFT and Fermi era: a new view of the prompt emission

2011-02-04

arxiv.org/abs/1102.1011v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 4 figures, prroceedings of the "GRBs 2010" conference in Annapolis (MD-USA)

Scientific paper

Gamma Ray Bursts (GRBs) show evidence of different light curves, duration, afterglows, host galaxies and they explode within a wide redshift range. However, their spectral energy distributions (SEDs) appear to be very similar showing a curved shape. In 1993 Band et al. proposed a phenomenological description of the integrated spectral shape for the GRB prompt emission, the so called Band function. We present an alternative scenario to explain the curved shape of GRB SEDs: the log-parabolic model.

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