  We have recently proposed an explanation for the birth velocities of pulsars
based on neutrino oscillations (hep-ph/9606428). One of the quantities, dN/dT,
was evaluated in the approximation of constant chemical potential for the
electrons. An alternative approximation based on the assumption Ye=const, used
by Qian (astro-ph/9705055), yields a somewhat higher prediction for the
magnetic field inside a neutron star. If the same input parameters are used,
the two approximations are in reasonable agreement, given the uncertainty in
the geometry of the magnetic field and the simplified picture of neutrino
emission that comes with the notion of a neutrinosphere.
