Histogram of the absolute night-to-night RV offsets measured on the 2008–2012 data of α Cen B. In green, we represent the night-to-night offsets as measured in the RVs from the HARPS DRS, and in red we show the same offsets obtained from the RVs derived using a unique wavelength solution. As we can see, the RV standard distribution of the red histogram is smaller, proving that the night-to-night offsets are reduced by our analysis.
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