2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44657We calculate limits on the properties of neutrinos using data from gamma-ray detectors on the Pioneer Venus Orbiter and Solar Max Mission satellites. A massive neutrino decaying in flight from the supernova would produce gamma rays detectable by these instruments. The lack of such a signal allows us to constrain the mass, radiative lifetime, and branching ratio to photons of a massive neutrino species produced in the supernova. Presented at Beyond The Standard Model III, June, 1992.5 Pages, 2 Figures (avalable on request). LaTeX, WorldSci.styHigh Energy Physics - PhenomenologyAstrophysicstext