The analysis of the energies and times of arrival of neutrino events in the Kamioka and Irvine-Michigan-Brookhaven detectors yields two mass groupings at ∼22 eV and the other at ∼4 eV, if all neutrinos were released rapidly at the supernova. A preliminary assignment of flavors to the neutrinos producing these events is attempted; this is beset with problems unless there is mixing and ${\nu }_{\tau }$ are emitted more copiously than ${\nu }_e$. Large statistical and systematic uncertainties necessitate caution in assessing this interpretation.

• Received 26 March 1987

DOI:https://doi.org/10.1103/PhysRevD.37.1685