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Fig. 9

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Observed minus calculated mid-transit times for K2-138c. The measurements of this work are plotted in black and the literature value of T0 of Lopez et al. (2019) in red. The literature ephemerides of Christiansen et al. (2018) and Lopez et al. (2019) are presented in green and blue, respectively. The dashed line presents the timing prediction, and the dotted lines present the 1 σ uncertainty ranges.

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