Figure 2.

Power spectrum of an 18-day segment with dense coverage (JD 2450784–801). A single peak appears at P = 0.14921(9) d, with the surrounding small bumps arising merely from the windowing of the time series. Arrows point to null detections at the orbital period and the photometric period familiar from studies during 1962–1994. Inset is the mean waveform at the 0.14921 d period.

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