TITLE: GCN CIRCULAR NUMBER: 7955 SUBJECT: New Swift-XRT GRB products available online. DATE: 08/07/08 17:22:32 GMT FROM: Phil Evans at U of Leicester P.A. Evans, J.P. Osborne (U. Leicester), D.N. Burrows (PSU) and S.D. Barthelmy (GSFC) report on behalf of the Swift-XRT team: The Swift-XRT team announce the release of a repository of GRB XRT spectra, available online at http://www.swift.ac.uk/xrt_spectra. This repository is analogous to the light curve repository; spectra are built and updated automatically and posted online within minutes of data becomming available. These spectra will shortly be available through the GCN Ground-Analysis Information page (http://gcn.gsfc.nasa.gov/swift_gnd_ana.html). The reliability of these spectra has been confirmed by the XRT team. You are welcome to use these spectra. Please see the full documentation, including the usage policy, at http://www.swift.ac.uk/xrt_spectra/docs.php. A paper describing their production will be forthcoming. We have also implemented upgrades to the GRB light curve repository (http://www.swift.ac.uk/xrt_curves/). Users may now: 1) rebin the light curves, 2) change the minimum number of counts and duration of the bins, and 3) define the energy ranges and grade selection criteria. In addition, the source and background event lists used to create the lightcurves are available for download using the links at the foot of each GRB's light curve page. These event lists contain extra information, such as the radius of the source region and the radius of any excluded, piled up region, for each event. The online documentation provides full details.