RVs of C0121-Bb as measured by the SOPHIE (black circles) and HARPS (red boxes) spectrographs. SOPHIE RVs were derived with TODMOR, while HARPS RVs were derived by fitting a sum of two Gaussians to the CCF. The solid line is the Keplerian model produced from the orbital parameters in Table 3 and the dashed line is the center-of-mass velocity. The residuals are plotted at the bottom.