Fig. 6
Upper plot: GLS periodogram of the HARPS pre-2016 RV data. The vertical red dashed line marks P = 215 days, the period found by AE16 in their likelihood-ratio periodogram, for which they could not give a physical interpretation. The p-value levels have been derived through a bootstrap analysis. Lower plot: GLS periodogram of the complete RV datates residuals after subtracting the GP plus one-planet model. The inset plot shows the same periodogram around P = 215 days, for more clarity.
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