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The Spectral Energy Distribution of Fermi bright blazars
A. A. Abdo, M. Ackermann, M. Ajello +107
(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the γ-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining ou…
GRB 090313: X-shooter's first shot at a GRB
A. de Ugarte Postigo, P. Goldoni, C. C. Thöne +26
Context. X-shooter is the first second-generation instrument to become operative at the ESO Very Large Telescope (VLT). It is a broad-band medium-resolution spectrograph designed w…
GRB090426: the farthest short gamma-ray burst?
L. A. Antonelli, P. D Avanzo, R. Perna +23
Aims. With an observed and rest-frame duration of < 2s and < 0.5s, respectively, GRB090426 could be classified as a short GRB. The prompt detection, both from space and ground-base…
Fermi Observations of GRB 090902B: A Distinct Spectral Component in the Prompt and Delayed Emission
GBM collaboration, LAT Collaboration, The Swift Team
We report on the observation of the bright, long gamma-ray burst, GRB 090902B, by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on-board the Fermi ob…
UVES-VLT High Resolution Spectroscopy of GRB080319B and GRB080330 Afterglows
Valerio D'Elia
We study here the Gamma-Ray Burst (GRB) environment through the analysis of the optical absorption features due to the gas surrounding the GRB. In particular, we analyze high resol…
Non variability of intervening absorbers observed in the UVES spectra of the "naked-eye" GRB080319
V. D'Elia, F. Fiore, P. Goldoni +7
The aim of this paper is to investigate the properties of the intervening absorbers lying along the line of sight of Gamma-Ray Burst (GRB) 080319B through the analysis of its optic…