CCF vrad vs. wavelength range. Top left: red vs. green linear regression for our six targets (see text): the regression slope is plotted vs. the regression zero-point with green diamonds for HERMES targets and green dots for FEROS targets. Top middle: histogram of red vs. blue vrad slope for our UVES targets. Top right: same, but for the vrad zero-point. Bottom left: amplitude of variation over P of the CCF BIS, plotted for our red range vs. our blue or green range, for the same targets as above (left). Bottom middle: distribution of the red vs. blue vrad slope with P for our UVES targets. Bottom right: same as middle, but for the vrad regression zero-point.
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