  During Supernova explosions two signals, Gravitational burst wave and
Neutrino Burst, of different nature, originated within 0.1 s from thesuper nova
explosion will be radiated in the outer space. If the neutrinos (as well as the
gravitons) are massless particles, than the original interval (if any) between
the two signals will be freezed forever. On the contrary, if the neutrinos have
a tiny mass, the time delay will increase during the propagation because of the
slower velocity of the neutrinos with respect to the massless gravitons.
Therefore, two signals, of different nature, originated within 0.1 s from the
super nova explosion will be radiated in the outer space. If the neutrinos (as
well as the gravitons) are massless particles, than the original interval (if
any) between the two signals will be freezed forever. If the neutrino has a
mass the time delay will increase during the propagation because of the slower
velocity of the neutrinos with respect to the massless gravitons: the time
delay detection may measure the neutrino mass or its absence may inferr a
severe neutrino mass bound.
