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The EXIST view of Super-Massive Black Holes in the Universe
Roberto Della Ceca, Gabriele Ghisellini, Gianpiero Tagliaferri +9
With its large collection area, broad-band energy coverage from optical/NIR (0.3 to 2.2 micron) to soft/hard X-ray (0.1-600 keV), all-sky monitoring capability, and on-board follow…
A wide field X-ray telescope for astronomical survey purposes: from theory to practice
P. Conconi, S. Campana, G. Tagliaferri +5
X-ray mirrors are usually built in the Wolter I (paraboloid-hyperboloid) configuration. This design exhibits no spherical aberration on-axis but suffers from field curvature, coma…
The X-ray absorbing column densities of Swift Gamma-ray bursts
S. Campana, C. C. Thone, A. de Ugarte Postigo +3
Long gamma-ray bursts (GRBs) are associated with the explosion of massive stars in star forming regions. A large fraction of GRBs show intrinsic absorption as detected in optical s…
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…
The Palermo Swift-BAT Hard X-ray Catalogue. II- Results after 39 months of sky survey
G. Cusumano, V. La Parola, A. Segreto +12
We present the Palermo Swift-BAT hard X-ray catalogue obtained from the analysis of the the data relative to the first 39 months of the Swift mission. We have developed a dedicated…