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Fig. 3.

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RVs of HD 189733b retrieved from the CCF header for the white light. The error bars are not visible since they are smaller than the dimension of the markers. In the same column, the associated S/N near 580 nm and the airmass is a function of the number of days since the first epoch. The average signal-to-noise is 178, 102, and 116, respectively.

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