Swift-UVOT optical counterpart candidate to XRF 050406. Rol, E. ; Schady, P. ; Hunsberger, S. ; Breeveld, A. ; Boyd, P. ; Kouveliotou, C. ; Roming, P. ; Nousek, J. ; Gehrels, N. Abstract Publication: GRB Coordinates Network Pub Date: 2005 Bibcode: 2005GCN..3186....1R