Lomb–Scargle power distribution as a function of period (represented by the Lomb–Scargle frequency on the x-axis) and radio frequency (y-axis), based on the Stokes V dynamic spectra at the highest time-frequency resolution (8 s × 195 kHz). Orange dashed lines mark periods of scientific interest: the stellar rotation period, the orbital period of the planet, and the synodic period and the harmonic period between the two. The peaks near 1 cycle/day are likely caused by observational windowing. Only peaks with a low false alarm probability (FAP < 0.01) are considered significant.