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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…
Pre-ALMA observations of GRBs in the mm/submm range
A. de Ugarte Postigo, A. Lundgren, S. Martín +24
GRBs generate an afterglow emission that can be detected from radio to X-rays during days, or even weeks after the initial explosion. The peak of this emission crosses the mm/submm…
Probing the ambient medium of GRB 090618 with XMM-Newton observations
S. Campana, P. D'Avanzo, D. Lazzati +3
Long Gamma-ray Bursts (GRBs) signal the death of massive stars. The afterglow emission can be used to probe the progenitor ambient through a detailed study of the absorption patter…
Discovery of the Onset of Rapid Accretion by a Dormant Massive Black Hole
D. N. Burrows, J. A. Kennea, G. Ghisellini +53
Massive black holes are believed to reside at the centres of most galaxies. They can be- come detectable by accretion of matter, either continuously from a large gas reservoir or i…