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Fig. 2


Evolution of the Hα profile from 1994 to present. The x-axis shows heliocentric velocities (in km s-1) and the y-axis shows observation dates (HJD-2 400 000). The intensity scale is shown below. The spectra were linearly interpolated onto a regular time grid to produce this image. The black dashes along the right axis show the actual observation dates.

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