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Fig. 9.

image

Fourier transform of TESS light curve of L 19−2 calculated out to twice the Nyquist frequency. The single significant observed signal is reflected across the Nyquist frequency (red dashed line), with the incorrect sub-Nyquist alias marked with a red × and the signal at the intrinsic frequency marked with a green triangle. The blue dashed line indicates the 0.1% FAP level.

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