Top two panels. Log-L periodograms for up to 2 signals in the S-index. The most likely periods of the proposed planet candidates are marked as vertical lines. Bottom two panels. Log-L periodograms for up to 2 signals in the FWHM. Given the proximity of these two signals, it is possible that both of them originate from the same feature (active region corotating with the star) that is slowly evolving with time.