Fig. 6
Chromospheric emission of the Ca ii H line measured at different epochs with NARVAL for HD 52265. Grey points are the individual measurements, while the red ones correspond to the daily averages. The starting date of the time series coincides with the beginning of CoRoT observations, i.e. November 13, 2008. The end of CoRoT observations is delineated with a vertical dashed line.
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