GCN Circular 18661
J.A. Kennea (PSU), G. Tagliaferri (INAF-OAB), S. Campana (INAF-OAB), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester) and D.N. Burrows (PSU) report on behalf of the Swift-XRT team: The XRT began observing the field of GRB 151205B at 22:35:21.5 UT, 3127.1 seconds after the BAT trigger. No source was detected in 245 s of promptly downlinked data. We are waiting for the full dataset to detect and localise the XRT counterpart.