Power spectra of the DM residuals left by the EW (left panel), DMX (central panel), and DM GP (right panel) methods. We also show the WN level (black) and the power spectra for different RN amplitudes: A_RN = −14.6 (orange with vertical dashes); A_RN = −13.6 (green with dots); and A_RN = −12.6 (blue with oblique dashes). With DM GP, we modeled the noise up to a Fourier-frequency of 30/T_span ~ 1.15 × 10⁻⁷ Hz, the same as the injected signal. That is why in the right-hand panel there is a drop at that specific frequency in the power spectrum of the DM GP residuals.