BGLS periodograms of the HARPS-N observations, for the measured RVs and for several activity indicators. The vertical scale is given in units of the logarithm of the Bayesian probability of a signal with a given period, where the highest peak is normalized to log p = 0. The lowest panel shows the spectral window function of the sampled data. See also Figs. 10 and B.1 for zoomed-in views around the 1.07 days and 29.5 days periods of planet b and the candidate c, respectively.