Generalised Lomb-Scargle periodograms. From left to right are the GLS periodograms for TOI-1820, TOI-2025, and TOI-2158. In the top row, we show the GLS periodograms directly from the RVs, and in the bottom we have removed the orbit of the planet. The vertical dashed lines from left to right denote the 4.9 d, 8.9 d, and 8.6 d signals seen in the photometry for TOI-1820, TOI-2025, and TOI-2158, respectively. The solid lines are our baselines, i.e. 1/(t_{last RV} − t_{first rv}) with t_{first rv} and t_{last rv} being the times for the first and last acquired RVs. The horizontal solid, dot-dashed, and dashed lines show the 10, 1, and 0.1% false alarm probabilities, respectively.