Cross-correlation functions between the two IUE observations of ν Pup and the 45 kK model template as described in Sect. 3.5. Because of different degrees of similarity to the spectrum of the Be primary, the cross-correlation functions for the 45 kK template are narrower than those with the 35 kK and 27.5 kK templates. The horizontal line indicates a signal-to-noise ratio level of 3.0 above which a companion with temperature ∼45 kK would be considered significant.