Threshold photoelectron-threshold photoelectron coincidence (TPEsCO) studies in the region of the Kr 3d shake up satellites P. Bolognesi #, M.C.A. Lopes #, M.A. MacDonald *, G.C. King#, L. Avaldi^2, G. Dawber# # Department of Physics and Astronomy, Manchester University, Manchester M13 9PL, UK * Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, UK ^2 IMAI del CNR, Area della Ricerca di Roma, CP10-00016 Monterotondo, Italy The decay of the Kr 3d^(-1) 4p^(-1) np shake up satellite states to the triple ion state is observed in a TPEsCO experiment. The Kr^(2+) 3d^(-1) 4p^(-1) states are also observed and resolved directly for the first time.