Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-05-16
Nuovo Cim. 121B (2006) 1367-1372
Astronomy and Astrophysics
Astrophysics
6 pages, 2 figures, to appear in the proceedings of "Swift and GRBs", Venice, 2006, Il Nuovo Cimento, in press
Scientific paper
Using the Swift data of GRB 050315, we progress on the uniqueness of our theoretically predicted Gamma-Ray Burst (GRB) structure as composed by a proper-GRB (P-GRB), emitted at the transparency of an electron-positron plasma with suitable baryon loading, and an afterglow comprising the so called "prompt emission" as due to external shocks. Thanks to the Swift observations, we can theoretically fit detailed light curves for selected energy bands on a continuous time scale ranging over 10^6 seconds. The theoretically predicted instantaneous spectral distribution over the entire afterglow confirms a clear hard-to-soft behavior encompassing, continuously, the "prompt emission" all the way to the latest phases of the afterglow. Consequences of the instrumental threshold on the definition of "short" and "long" GRBs are discussed.
Bianco Carlo Luciano
Chardonnet Pascal
Fraschetti Federico
Grazia Bernardini Maria
Guida Roberto
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