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Swift and optical observations of GRB 050401
Massimiliano De Pasquale, Andy P. Beardmore, S. D. Barthelmy +22
We present the results of the analysis of gamma-ray and X-ray data of GRB 050401 taken with the Swift satellite, together with a series of ground-based follow-up observations. The…
Unveiling the thermal and magnetic map of neutron star surfaces though their X-ray emission: method and lightcurves analysis
Silvia Zane, Roberto Turolla
Recent Chandra and XMM-Newton observations of a number of X-ray ``dim'' pulsating neutron stars revealed quite unexpected features in the emission from these sources. Their soft th…
A Compton reflection dominated spectrum in a peculiar accreting neutron star
Nanda Rea, Luigi Stella, Gian Luca Israel +5
We report on a puzzling event occurred during a long BeppoSAX observation of the slow-rotating binary pulsar GX 1+4. During this event, lasting about 1 day, the source X-ray flux w…
Very Early Optical Afterglows of Gamma-Ray Bursts: Evidence for Relative Paucity of Detection
P. W. A. Roming, P. Schady, D. B. Fox +38
Very early observations with the Swift satellite of gamma-ray burst (GRB) afterglows reveal that the optical component is not detected in a large number of cases. This is in contra…
The calm after the storm: XMM-Newton observation of SGR 1806-20 two months after the Giant Flare of 2004 December 27
A. Tiengo, P. Esposito, S. Mereghetti +5
XMM-Newton observed the soft gamma repeater SGR 1806-20 about two months after its 2004 December 27 giant flare. A comparison with the previous observations taken with the same ins…
Evidence for surface cooling emission in the XMM-Newton spectrum of the X-ray pulsar PSR B2334+61
Katherine E. McGowan, Silvia Zane, Mark Cropper +2
We report on the first XMM-Newton observation of the Vela-like pulsar PSR B2334+61. Spectral analysis reveals soft X-ray emission, with the bulk of the photons emitted at energies…