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We used archival International Ultraviolet Explorer (IUE) high-dispersion,short wavelength spectra data to search for evidence of the spectra of hotsubdwarf companions of six rapidly rotating Be stars in binary systems. Wesearched for the signature of a hot companion through an analysis of thecross-correlation functions of observed and model spectra that were separatedinto primary and secondary components using a Doppler tomography algorithm andadopted spectroscopic orbital solutions. A positive detection of the flux froma hot companion was made for the reconstructed secondary cross-correlationfunction of just one target, 60 Cygni (B1 Ve). We estimate that the companionof 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 Bestars are also hot, then they must be faint and contribute less than $\approx1\%$ of the UV flux ($<0.6 \%$ in the case of $\gamma$ Cas). We also discuss inan appendix a shell episode of Pleione (28 Tau) recorded in the IUE spectra.

Detection of the Ultraviolet Spectrum of the Hot Subdwarf Companion of 60 Cygni (B1 Ve) from a Survey of IUE Spectra of Be Stars