Neutrino burst from supernovae and the implications for neutrino oscillation parameters

It was shown that neutrinos have finite masses and convert each other from the solar and atmospheric neutrino observations. The time profile and energy spectrum of neutrino burst from supernovae should be greatly modified by this effect. We review how this conversion happens in a supernova mantle and how the burst will be detected by SK (Super-Kamiokande) and SNO (Sudbury Neutrino Observatory). We show that implications for neutrino parameters (mass hierarchy and the mixing, angle between mass eigenstate nu(1), nu(3)), are obtained if a supernova appears at Galactic Center. We also discuss effects of neutrino oscillation on the supernova relic neutrino observations.