TITLE: GCN CIRCULAR NUMBER: 11813 SUBJECT: GRB 110319B found in ground analysis of Swift-BAT data DATE: 11/03/20 02:31:42 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift J. R. Cummings (UMBC/CRESST/NASA-GSFC), D. M. Palmer (Los Alamos), B. Sbarufatti (INAF-OAB/IASFPA), C. Gronwall (PSU) At 19:34:02, during a Swift slew, Fermi GBM detected a burst. The IPN was alerted. In a mosaic image of BAT slew event data a strong source is found at RA, Dec 326.074, -56.773, which is: RA (J2000) 21h 44m 17.8s Dec (J2000) -56d 46m 24s with an estimated uncertainty of 3 arcmin radius (90% confidence). The burst was in the fully-coded field of view from the trigger time to the end of the Swift slew. This position is 60 degrees (2.2 hours) from the Sun. GRB 110319B was a long GRB with a T90 about 18 seconds. The lightcurve as seen by BAT was a single FRED. A Swift TOO is scheduled to begin at 03:10 March 20, 2011. The BA for this burst is B. Sbarufatti (INAF-OAB/IASFPA).