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Fig. 1

image

Top panel: Johnson V photometry of Gl 411 from the 2012 observing season, acquired with the TSU T3 0.40 m APT at Fairborn Observatory. Middle panel: frequency spectrum of the 2012 V observations of Gl 411. The best frequency occurs at 0.01683 ± 0.00019 cycles day−1, corresponding to a best period of 59.42 ± 0.67 days. Bottom panel: 2012 V observationsphased with the best period of 59.42 days. The phase curve shows coherent variability with a peak-to-peak amplitude of 0.0075 mag, which we take to be rotational modulation of photospheric spots. Seven of the eight observing seasons exhibit similar modulation (see Table B.1).

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