GRB 111209A: Swift detection of a long burst with an optical counterpart. Hoversten, E. A. ; Evans, P. A. ; Guidorzi, C. ; Lien, A. Y. ; Pagani, C. ; Page, K. L. ; Palmer, D. M. ; Sbarufatti, B. ; Siegel, M. H. ; Stroh, M. C. ; Tagliaferri, G. ; Zhang, B. -B. Abstract Publication: GRB Coordinates Network Pub Date: 2011 Bibcode: 2011GCN.12632....1H