Temporal evolution of the stellar activity. From top to bottom: RV data, FWHM, the Area of the Gaussian fit to the CCF, Bisector, $\log R_{\mathrm{H}\mathrm{K}}^{\mathrm{\prime }}$ Hα lines, and linear trend. From left to right: Time series, GLSP for first campaign, second campaign and both campaigns. In all time series, we have eliminated long-term variation by a two-degree polynomial fit. The large red, green and blue vertical lines indicate the stellar rotation period (and half its period), the orbital period of the transiting planet (b), and the orbital period of the candidate planet (c), respectively.