Fig. 2
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Nightly zero points (NZPs) of CARMENES VIS. The RVs of all RV constant stars (small green points) are zero-centred. A mean (the NZP, solid black circles) is computed for each night, in which identified outliers (small red points) are omitted. NZPs with fewer than three RV standard observations (open magenta circles) are replaced by a local mean.
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