  According to recent studies, the collective flavor evolution of neutrinos in
core-collapse supernovae depends strongly on the flavor-dependent angular
distribution of the local neutrino radiation field, notably on the angular
intensity of the electron-lepton number carried by neutrinos. To facilitate
further investigations of this subject, we study the energy and angle
distributions of the neutrino radiation field computed with the Vertex
neutrino-transport code for several spherically symmetric (1D) supernova
simulations (of progenitor masses 11.2, 15 and 25 M_sun) and explain how to
extract this information from additional models of the Garching group.
Beginning in the decoupling region ("neutrino sphere"), the distributions are
more and more forward peaked in the radial direction with an angular spread
that is largest for $\nu_e$, smaller for $\bar\nu_e$, and smallest for $\nu_x$,
where $x=\mu$ or $\tau$. While the energy-integrated $\nu_e$ minus $\bar\nu_e$
angle distribution has a dip in the forward direction, it does not turn
negative in any of our investigated cases.
