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Fig. 11

image

Lomb–Scargle periodogram of the TTVs for 22 transits (black curve) and 54 transits (red curve), with dominant frequencies labelled (see text). Normalised power is plotted against frequency in units of the orbital frequency νb of planet b. Only the Nyquist window 0 ≤ ννb ≤ 1∕2 is shown; higher frequencies are aliases of these values.

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