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Fig. 4

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Top panel: HARPS radial velocities of Gl 676A as a function of orbital phase, after subtraction of adjusted linear drift and overlaid with the adjusted Keplerian orbit. Middle panel: residual of the HARPS radial from the adjusted orbit and linear drift, as a function of time. Bottom Panel: Lomb-Scargle periodogram of the residuals The horizontal lines mark false alarm probabilities equivalent to 1 and 2 sigmas significance levels for Gaussian noise.

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