Fig. 6
Median-subtracted pEWs of the CaII K line (grey dots) folded in phase with the period of 90.72 days. The red line depicts the sinusoidal fit to the folded data (amplitude of 1.5 Å), and the blue dots correspond to the data points averaged with their 21 neighbours. Flares and strongly deviant data points are not included in the diagram.
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