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Fig. 5

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Representative wind profiles from IUE spectra showing the typical variation over a 12-day cycle, which is very similar to the type of variation observed in other magnetic B stars but unlike the variations observed in O stars. Top: C iv. Middle: Si iv. Bottom: N v. The two doublet rest wavelengths are indicated by vertical dashed lines. Top scales: Wavelength. Bottom scales: velocity relative to the stellar rest frame. In each panel the lower part displays the significance of the variability, as the ratio of the measured to the expected variances.

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