Swift trigger 638589 is probably not an astrophysical source. Baumgartner, W. H. ; Cummings, J. R. ; Krimm, H. A. ; Marshall, F. E. ; Palmer, D. M. ; Sbarufatti, B. Abstract Publication: GRB Coordinates Network Pub Date: 2015 Bibcode: 2015GCN.17724....1B