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The HELLAS2XMM survey.VIII. Optical identifications of the extended sample
F. Cocchia, F. Fiore, C. Vignali +14
(Abridged) We present the results of the photometric and spectroscopic identification of 110 hard X-ray selected sources (6e-15<F(2-10 keV)<4e-14 cgs) from 5 additional XMM-Newton…
Analysis of X-ray flares in GRBs
D. Guetta, V. D'Elia, F. Fiore +3
We present a detailed study of the spectral and temporal properties of the X-ray flares emission of several GRBs. We select a sample of GRBs which X-ray light curve exhibits large…
Can we use Gamma Ray Bursts to probe high redshift star-formation?
F. Fiore, D. Guetta, S. Piranomonte +2
We present a detailed analysis of the selection effects that plague GRB observations. We find that these effects may partially explain the different redshift distributions between…
UVES/VLT high resolution spectroscopy of GRB 050730 afterglow: probing the features of the GRB environment
V. D'Elia, F. Fiore, E. Meurs +44
We analyze high resolution spectroscopic observations of the optical afterglow of GRB050730, obtained with UVES@VLT about hours after the GRB trigger. The spectrum shows that the I…
The XMM-Newton survey of the ELAIS-S1 field. I: Number counts, angular correlation function and X-ray spectral properties
S. Puccetti, F. Fiore, V. D'Elia +16
We have surveyed with XMM-Newton the central ~0.6 deg2 region of the ELAIS-S1 field down to flux limits of ~5.5X10-16 cgs (0.5-2 keV, S band), ~2X10-15 cgs (2-10 keV, H band), and…
The variable X-ray light curve of GRB 050713A: the case of refreshed shocks
D. Guetta, F. Fiore, V. D'Elia +21
We present a detailed study of the spectral and temporal properties of the X-ray and optical emission of GRB050713a up to 0.5 day after the main GRB event. The X-ray light curve ex…