Swift observations of GRB 070508. Grupe, D. ; Markwardt, C. ; Barthelmy, S. D. ; Chester, M. ; Marshall, F. ; Racusin, J. ; Pagani, C. ; Burrows, D. N. ; Roming, P. ; Gehrels, N. Abstract Publication: GCN Report Pub Date: 2007 Bibcode: 2007GCNR...54....1G