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Evidence for intrinsic absorption in the Swift X-ray afterglows
S. Campana, P. Romano, S. Covino +29
Gamma-ray burst (GRB) progenitors are observationally linked to the death of massive stars. X-ray studies of the GRB afterglows can deepen our knowledge of the ionization status an…
The in-flight spectroscopic performance of the Swift XRT CCD camera
J. P. Osborne, A. P. Beardmore, O. Godet +23
The Swift X-ray Telescope (XRT) focal plane camera is a front-illuminated MOS CCD, providing a spectral response kernel of 144 eV FWHM at 6.5 keV. We describe the CCD calibration p…
Swift XRT Observations of the Breaking X-ray Afterglow of GRB 050318
M. Perri, P. Giommi, M. Capalbi +26
We report the results of Swift X-Ray Telescope (XRT) observations of GRB 050318. This event triggered the Burst Alert Telescope (BAT) aboard Swift and was followed-up with XRT and…
The Swift X-ray Telescope
David N. Burrows, J. E. Hill, J. A. Nousek +21
The Swift Gamma-Ray Explorer is designed to make prompt multiwavelength observations of Gamma-Ray Bursts (GRBs) and GRB afterglows. The X-ray Telescope (XRT) enables Swift to deter…
Bright X-ray Flares in Gamma-Ray Burst Afterglows
D. N. Burrows, P. Romano, A. Falcone +31
Gamma-ray burst (GRB) afterglows have provided important clues to the nature of these massive explosive events, providing direct information on the nearby environment and indirect…
An unexpectedly rapid decline in the X-ray afterglow emission of long gamma-ray bursts
G. Tagliaferri, M. Goad, G. Chincarini +32
Long gamma-ray bursts (GRBs) are commonly accepted to originate in the explosion of particularly massive stars, which gives rise to a highly relativistic jet. Internal inhomogeneit…