Fig. 5.
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Time plot of radial velocities. Top panel: RV of the He I shell lines. Bottom panel: RV measured on the steep wings of the Hα emission. Data from individual instruments are shown by different symbols: the circles are the same as in Fig. 2, and black crosses plot data from Ballereau & Chauville (1989). The ranges on the two axes in the two plots are different.
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