Fig. 5
Annual averaged radial velocities of the blue peak. The different symbols represent: stars – the Hβ data from Gaskell (1996), open squares – the Hβ measurements given in Veilleux & Zheng (1991), year-averaged to match other data, full circles – the Hα data from Eracleous et al. (1997), open and full triangles – our data for Hβ and Hα, respectively.
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