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Fig. 6


The top figure is the periodogram of the radial velocities residuals (once the 9.67-day-period planet has been subtracted) on the time interval 10 − 100 days. Some residual energy remains close to frequency (resp. period) ν = 0.027 day-1 (resp. P = 37 day). This energy peak is close to the 40-day-rotation period derived from the activity index, and is also present in the periodograms of the CCF FHWM (resp.  and bisector inverse slope) to state that the observed 37-day variability is activity induced.

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