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Heavily obscured AGN in the local Universe
P. Severgnini, A. Caccianiga, R. Della Ceca +4
We present here a new powerful diagnostic plot to select heavily obscured AGN in the local universe by combining infrared (Spitzer, IRAS) and X-ray (XMM) information. On the basis…
Swift/XRT monitoring of the Supergiant Fast X-ray Transient IGR J18483-0311 for an entire orbital period
P. Romano, L. Sidoli, L. Ducci +9
IGR J18483-0311 is an X-ray pulsar with transient X-ray activity, belonging to the new class of High Mass X-ray Binaries called Supergiant Fast X-ray Transients. This system is one…
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…
GRB 090423 at a redshift of z~8.1
R. Salvaterra, M. Della Valle, S. Campana +42
Gamma-ray bursts (GRBSs) are produced by rare types of massive stellar explosions. Their rapidly fading afterglows are often bright enough at optical wavelengths, that they are det…
Supergiant Fast X-ray Transients in outburst: new Swift observations of XTEJ1739-302, IGRJ17544-2619, and IGRJ08408-4503
L. Sidoli, P. Romano, L. Ducci +8
We report on new X-ray outbursts observed with Swift from three Supergiant Fast X-ray Transients (SFXTs): XTEJ1739-302, IGRJ17544-2619 and IGRJ08408-4503. The former two outbursts…
The multicomponent model of the Crab Pulsar at energies above 25 GeV
R. Campana, E. Massaro, T. Mineo +1
We review a proposed multicomponent model to explain the features of the pulsed emission and spectrum of the Crab Pulsar, on the light of the recent detection of pulsed emission ab…