Swift detection of a bright X-ray source in M31. Barthelmy, S. D. ; Baumgartner, W. H. ; Cenko, S. B. ; D'Elia, V. ; Malesani, D. ; Mangano, V. ; Marshall, F. E. ; Sbarufatti, B. Abstract Publication: GRB Coordinates Network Pub Date: 2014 Bibcode: 2014GCN.16332....1B