Fig. 3
Upper panel: lomb-Scargle periodogram of the timing deviation from the linear ephemeris (O–C) when excluding the partial transits (black). A marginal signal can be seen at a frequency of ~0.0019 day-1. In comparison, the periodogram without the transit of March 19, 2012 (epoch = −8) is also shown (red). Lower panel: window function of the data set.
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