Swift XRT positions. Angelini, L. ; Hill, J. E. ; Moretti, A. ; Chincarini, G. ; Burrows, D. N. ; Kennea, J. A. ; Racusin, J. ; Osborne, J. Abstract Publication: GRB Coordinates Network Pub Date: 2005 Bibcode: 2005GCN..4313....1A