Fig. 1
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Light curve, GLS and L1 periodograms for the K2 data. Top: K2 light curve of CI Tau. Middle: GLS periodogram of the K2 light curve, showing three peaks at 6.6, 9.0, and 24.2 d indicated with blue dashed lines. Bottom: L1 periodogram, showing the same periods as found in the GLS periodogram, with an additional significant peak at 47.2 d.
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