TITLE: GCN CIRCULAR NUMBER: 12709 SUBJECT: XRT GRB Catalogue now live and online DATE: 11/12/20 13:47:33 GMT FROM: Phil Evans at U of Leicester P.A. Evans, J.P. Osborne (U. Leicester), D.N.Burrows (PSU) and G. Tagliaferri (INAF-OAB) report on behalf of the Swift-XRT team: An automatically updated version of the XRT GRB catalogue is now available online at http://www.swift.ac.uk/xrt_live_cat This contains time-resolved analysis of every GRB detected by XRT, and many of the plots from the original XRT catalogue (Evans et al. 2009, MNRAS, 397, 1177), and is automatically updated, with new bursts incorporated once they are 24 hours old (to allow sufficient data to accumulate). For each GRB various plots are shown to allow easy comparison of details such as temporal and spectral decay indices for that specific burst with the population at large. This is a publically-available facility, however we request that users cite Evans et al. (2009). This circular, and the facility, are official products of the Swift-XRT team.