S-index (upper panel), bisector velocity span (middle panel) and FWHM of the CCF (lower panel) versus the measured RV (left-hand panel) and versus the residual RV for HD 47536, after fitting the one-planet solution. Only the values for the activity indices laying 2.5σ from the mean value of the distribution were considered. The correlation coefficients for the plots in the left-hand panels are r = −0.3, 0.3 and −0.02, and for the right-hand panels are r = −0.2, 0.24 and −0.23 for the S-index, BVS and FWHM versus the residual velocity, respectively. Horizontal dashed lines correspond to the mean of the distribution for each plot.