GRB 121217A: Swift detection of a burst. Siegel, M. H. ; Barlow, B. N. ; Burrows, D. N. ; Chester, M. M. ; D'Elia, V. ; Grupe, D. ; Kuin, N. P. M. ; Markwardt, C. B. ; Palmer, D. M. ; Stamatikos, M. Abstract Publication: GRB Coordinates Network Pub Date: 2012 Bibcode: 2012GCN.14089....1S