Residual periodogram for model that includes planets “b”+“c”+“d”. The signal “e” is located at ~36 d. The result with the original RV dataset is shown in red, whereas the blue curve was obtained after removing 10 measurements in the range MJD = 54 660–54 690. Removing only those 10 points, which seem to correlate with activity indicators, decreases the power of signal “e” by as much as 20%.