GRB 091029: Swift detection of a burst with an optical counterpart. Grupe, D. ; Cummings, J. R. ; Marshall, F. E. ; Pagani, C. ; Palmer, D. M. ; Siegel, M. H. ; Stamatikos, M. ; Ukwatta, T. N. ; Vetere, L. Abstract Publication: GRB Coordinates Network Pub Date: 2009 Bibcode: 2009GCN.10097....1G