Fig. 5
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Cleaning of stellar activity signals from the K2 light curve. Top panel: quasi-periodic GP model fit (in red) with two periodic components of 6.6 and 9.0 d. The shaded region in the top panel shows 1, 2, and 3σ from the mean model. The bottom panel shows the L1 periodogram of the residual light curve after removing the modulation due to stellar spots.
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