  CPT-Violating photons are well-known to have problems with energy positivity
in certain cases and therefore have not been convincingly quantized to date. We
find that by adding a small mass term, consistent with experimental bounds, the
theory can be regulated and allows for a consistent covariant quantization
procedure. This new framework is applied to a consistent quantum calculation of
vacuum Cherenkov radiation rates. These rates turn out to be largely
independent of the mass of the photon regulator used. In the physical regime,
accessible by ultra high energy cosmic rays, the behavior of the rate is
proportional to the square of the CPT-violating parameter and is not
realistically observable.
