  We consider sterile neutrinos with rest masses ~0.2 GeV. Such sterile
neutrinos could augment core collapse supernova shock energies by enhancing
energy transport from the core to the vicinity of the shock front. The decay of
these neutrinos could produce a flux of very energetic active neutrinos,
detectable by future neutrino observations from a galactic supernova. The
relevant range of sterile neutrino masses and mixing angles can be probed in
future laboratory experiments.
