IceCube-170922A: Swift-XRT observations. Keivani, A. ; Evans, P. A. ; Kennea, J. A. ; Fox, D. B. ; Cowen, D. F. ; Osborne, J. P. ; Marshall, F. E. Abstract Publication: GRB Coordinates Network Pub Date: 2017 Bibcode: 2017GCN.21930....1K