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Figure 1:
HARPS spectra of the Ca II H
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Figure 2: Upper panel: phased radial velocities for Gl 581. Lower panel: residuals around the fitted solution versus time. |
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Figure 3: Bissectors of the HARPS correlation profiles for Gl 581. The shape of the bissector curve is independent of its position, eliminating the possibility that stellar spot cause the radial-velocity variations. |
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