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The X-ray absorbing column density of a complete sample of bright Swift Gamma-Ray Bursts
S. Campana, R. Salvaterra, A. Melandri +7
A complete sample of bright Swift Gamma-ray Bursts (GRBs) has been recently selected by Salvaterra et al. (2011). The sample has a high level of completeness in redshift (91%). We…
The Dark Bursts population in a complete sample of bright Swift Long Gamma-Ray Bursts
A. Melandri, B. Sbarufatti, P. D'Avanzo +11
We study the properties of the population of optically dark events present in a carefully selected complete sample of bright Swift long gamma-ray bursts. The high level of complete…
A complete sample of bright Swift Long Gamma Ray Bursts: testing the spectral-energy correlations
L. Nava, R. Salvaterra, G. Ghirlanda +11
We use a nearly complete sample of Gamma Ray Bursts (GRBs) detected by the Swift satellite to study the correlations between the spectral peak energy Ep of the prompt emission, the…
A complete sample of bright Swift Long Gamma-Ray Bursts: Sample presentation, Luminosity Function and evolution
R. Salvaterra, S. Campana, S. D. Vergani +11
We present a carefully selected sub-sample of Swift Long Gamma-ray Bursts (GRBs), that is complete in redshift. The sample is constructed by considering only bursts with favorable…
A minor body falling onto a neutron star as an explanation for the unusual gamma-ray burst GRB 101225A
S. Campana, G. Lodato, P. D'Avanzo +17
The tidal disruption of a solar mass star around a supermassive black hole has been extensively studied analytically and numerically. In these events the star develops into an elon…
Gamma Ray Bursts in the comoving frame
G. Ghirlanda, L. Nava, G. Ghisellini +4
We estimate the bulk Lorentz factor Gamma_0 of 31 GRBs using the measured peak time of their afterglow light curves. We consider two possible scenarios for the estimate of Gamma_0:…