Maximum likelihood periodograms of the RVs (left) and the residuals (right) after subtracting the best Keplerian model. As the SONG RVs are known to show spurious RV periodicity at a one-year period (Heeren et al. 2023), we plot the MLPs of the residual RVs excluding the SONG data in blue, while the periodograms including the SONG data are shown in orange. The FAPs of 5% (dashed), 1% (dash-dotted), and 0.1% (dotted) are plotted as gray horizontal lines. The identifiers of the two planet hosts, HIP 75458 and HIP 88048, are marked in red. Significant periodicity remains close to the strongest RV period after removing the best fit for many of the stars.