[3][4] Powerful bursts of electron neutrinos (νe) with typical energies of the order of 10 MeV and duration of the order of 10 seconds are produced in the core of a red giant star as it collapses on itself via the "neutronization" reaction, i.e. fusion of protons and electrons into neutrons and neutrinos: p + e− → n + νe.
[5] SNEWS is not able to give warning of a type Ia supernova, as they are not expected to produce significant numbers of neutrinos.
[6] There are currently seven neutrino detector members of SNEWS: Borexino, Daya Bay, KamLAND, HALO, IceCube, LVD, and Super-Kamiokande.
[7] SNEWS began operation prior to 2004, with three members (Super-Kamiokande, LVD, and SNO).
The Sudbury Neutrino Observatory is no longer active as it is being upgraded to its successor program SNO+.