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Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
P. A. Evans, A. P. Beardmore, K. L. Page +22
We present a homogeneous X-ray analysis of all 318 Gamma Ray Bursts detected by the X-ray Telescope on the Swift satellite up to 2008 July 23; this represents the largest sample of…
Broad Absorption Line Quasar catalogues with Supervised Neural Networks
Simone Scaringi, Christopher E. Cottis, Christian Knigge +1
We have applied a Learning Vector Quantization (LVQ) algorithm to SDSS DR5 quasar spectra in order to create a large catalogue of broad absorption line quasars (BALQSOs). We first…
The Intrinsic Fraction of Broad Absorption Line Quasars
Christian Knigge, Simone Scaringi, Michael R. Goad +1
We carefully reconsider the problem of classifying broad absorption line quasars (BALQSOs) and derive a new, unbiased estimate of the intrinsic BALQSO fraction from the SDSS DR3 QS…
The Swift X-Ray Telescope: Status and Performance
David N. Burrows, J. A. Kennea, A. F. Abbey +23
We present science highlights and performance from the Swift X-ray Telescope (XRT), which was launched on November 20, 2004. The XRT covers the 0.2-10 keV band, and spends most of…
Line Searches in Swift X-ray Spectra
C. P. Hurkett, S. Vaughan, J. P. Osborne +14
Prior to the launch of the Swift mission several X-ray line detections were reported in Gamma Ray Burst afterglow spectra. To date, these pre-Swift era results have not been conclu…
Improving Swift-XRT positions of GRBs
P. A. Evans, A. P. Beardmore, M. R. Goad +3
Since GRBs fade rapidly, it is important to publish accurate, precise positions at early times. For Swift-detected bursts, the best promptly available position is most commonly the…