  We used archival International Ultraviolet Explorer (IUE) high-dispersion,
short wavelength spectra data to search for evidence of the spectra of hot
subdwarf companions of six rapidly rotating Be stars in binary systems. We
searched for the signature of a hot companion through an analysis of the
cross-correlation functions of observed and model spectra that were separated
into primary and secondary components using a Doppler tomography algorithm and
adopted spectroscopic orbital solutions. A positive detection of the flux from
a hot companion was made for the reconstructed secondary cross-correlation
function of just one target, 60 Cygni (B1 Ve). We estimate that the companion
of the Be star in 60 Cygni has $T_{\rm eff} = 42 \pm 4$ kK, mass ratio $M_2/M_1
= 0.15 \pm 0.02$, and monochromatic flux ratio ${f_2}/{f_1} = 0.034 \pm 0.002$
in the spectral region near 1525 \AA. If the companions of the other target Be
stars are also hot, then they must be faint and contribute less than $\approx
1\%$ of the UV flux ($<0.6 \%$ in the case of $\gamma$ Cas). We also discuss in
an appendix a shell episode of Pleione (28 Tau) recorded in the IUE spectra.
