GLS periodograms of the HARPS-N RVs. The top panel shows periodograms of the original RVs, while subsequent panels show periodograms of the RVs after subtracting our median model fits for TOI-4010 e, d, c, and b, respectively. In each panel, the horizontal lines mark 1% (dotted line) and 0.1% (dashed–dotted line) false-alarm probability levels, while vertical lines mark the orbital periods of the four planets.