Is the LMA solar-neutrino solution ruled out by SN1987A data?

The development of new supernova neutrino detectors relies on the expected hard energy spectrum of the vc, and v, emitted in the supernova. We show th at SN1987A was sensitive to the large mixing angle (LMA) and "just so" solu tion to the solar neutrino problem. We review the previous analysis of the SN1987A data and propose a new analysis. The results of this analysis stron gly disfavor the LMA solution, provided the v(mu) and v(tau) are hard as pr edicted.