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Fig. 11

image

Gaussian-process model for each nightly binned photometric data set of HD 238090. From top to bottom: NSVS, MEarth 2009 to 2010, MEarth 2010 to 2014, SNO V, SNO R, and TJO. For each instrument, we fit individual GP hyperparameters for the amplitudes and Γi, but we used global GP hyperparameters for the timescale of the amplitude modulation and the rotation period.

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