TITLE: GCN CIRCULAR NUMBER: 12638 SUBJECT: GRB111209A : planned XMM-Newton observation DATE: 11/12/09 16:05:56 GMT FROM: Bruce Gendre at ASDC B. Gendre (ASDC/INAF-OAR), J.L. Atteia (IRAP-OMP), M. Boër (OHP-OAMP), A. Klotz (IRAP-OMP), L. Piro (INAF-IASF-Roma), G. Stratta (ASDC/INAF-OAR), on behaf of a larger collaboration, report : Following the trigger of the exceptionally long and bright GRB 111209A, we have activated a 50 ks (net) TOO on XMM-Newton starting on 2011-12-09:22:12:58 UT. We encourage any simultaneous follow-up of this event at any wavelength. This message can be quoted.