  The recorded activity of gamma Cas (B0.5 IVe) in the ultraviolet is important
to an understanding of the mechanism behind this prototypical Be star's high
energy activity, especially its hard X-ray emissions. Our analysis focuses
first on the phasing of ultraviolet and optical light curves from different
epochs. The rotational interpretation of the 1.22d optical signal is
justifiedin part on this phasing. Next we detail observations of "migrating
subfeatures," which traverse blue to red across line profiles in high quality
spectra. These are likely to be proxies for surface magnetic fields, which have
not been detected yet by spectropolarimetric means in rapid rotating Be stars
like gamma Cas. We also analyze the important responses of the semi-forbidden
resonance S IV line at \lambda1404.8 to simultaneous X-ray variations. These
results offer indirect support for the existence of small-scale magnetic fields
on this Be star.
