TESS Sector 6 (top), Sector 33 (middle) and Sector 87 (bottom) power spectra. The 3.941-hour period (P_PSH) is indicated in the Sector 6 plot together with the first harmonic (2P_PSH). The Sector 33 plot indicates the low frequency signal at ∼32 hours, with an inset plot showing the phase-folded light curve on this period. The dashed line indicates the spectroscopic period of 3.645 hours associated with the orbital period.