Phase-folded radial velocity signal of LHS 1140 b (left panels) and LHS 1140 c (right panels). For each planet, upper panel: radial velocity data (color-coded as in the legend), binned radial velocities (open black symbols) with a bin size corresponding to 15% of the phase, the median model for each planet obtained from the joint fit analysis (see Sect. 6) as the solid black line, and the 68.7 and 95% confidence intervals as shaded dark and light gray regions. Bottom panels: residuals of the median model.