In recognition of the firm evidence provided by the 1998 and 2001 experiments "for neutrino oscillation", Takaaki Kajita from the Super-Kamiokande Observatory and Arthur McDonald from the Sudbury Neutrino Observatory (SNO) were awarded the 2015 Nobel Prize for Physics. The Nobel Committee for Physics, however, erred in mentioning neutrino oscillations in regard to the SNO-Experiment: for the high-energy solar neutrinos observed in that experiment, it is not neutrino oscillations, but the Mikheyev–Smirnov–Wolfenstein effect. Bruno Pontecorvo was not included in these Nobel prizes since he died in 1993.