Time series of the RVs (left column) of TOI-4342 and the corresponding periodograms in red (right column) for different residual data sets. From top to bottom: observed RVs; RVs after subtraction of the GP model (2 p); RVs after subtraction of the full 2 p+ GP model; RVs after subtraction of the GP model (3 p); and RVs after subtraction of the full 3 p+GP model. The vertical brown lines indicate the stellar rotation period at ∼14 days (dashed line) and its first harmonic at ∼7 days (dotted line). The orange and green vertical dashed lines mark the expected orbital periods of planets b and c, respectively. The 10%, 1%, and 0.1% False Alarm Probability (FAP) levels are shown as gray horizontal dashed, dash-dotted, and dotted lines, respectively.