Galactic and extragalactic sources of high energy neutrinos

Possible sources of neutrinos with energies > 1 TeV, and fluxes which yield signals above atmospheric background at large neutrino detectors are identified and discussed. An interesting candidate for a Galactic source lies in the Cygnus-OB2 region of star formation, with neutrinos resulting from neutron decay following nuclear photodisintegration on the ambient photon sea. Possible extragalactic sources are Fanaroff-Riley I radio galaxies similar to Centaurus A, in which cumulative burst activity can be integrated over the Hubble sphere to provide a positive neutrino signal at IceCube.