Top: Orbital solution for CU Cnc, shown as a function of the orbital phase. Circles mark the individual radial velocities obtained from the LSD profiles in this work (see Table A.1), and triangles and diamonds correspond to the measurements taken from W17 and D99 respectively. Dashed lines show the best-fit orbital solution. The blue and red colours refer to the primary and secondary components, respectively. Bottom: Residuals between the individual radial velocity measurements and the orbital solution for the primary (upper panel) and secondary (lower panel) component.