HD 113337 spectroscopic data. On all Lomb–Scargle periodograms, the 1% false-alarm probability (FAP) is plotted in red. On all periodograms, the periods of planet b and/or candidate planet c are plotted in blue. Top row, from left to right: RV time series, Lomb–Scargle RV periodogram, CLEAN RV periodogram, and observational window function. Overplotted on the RV is the two-planet Keplerian fit (red curve) and the Keplerian fit of the second candidate planet only (blue curve). Second and third rows: BIS and FWHM time series, corresponding Lomb–Scargle and CLEAN periodograms, and correlations with the RV data. Fourth row: RV residuals from planet b, corresponding Lomb–Scargle and CLEAN periodograms, and correlation with the BIS. The Keplerian fit of the candidate second planet is overplotted on the RV residuals (red curve). Fifth row: same, for the RV residuals of the two-planet Keplerian fit.