Model RV curves (blue lines) and measurements (red points) of the eclipsing pair ASAS-052 A. Open symbols and the solid line refer to the primary, and solid symbols and the dashed line to the secondary. The dotted horizontal line marks the systemic velocity of the primary. Residuals (all in km s⁻¹) are shown below. Symbols used for each of the instruments are labelled. The phase zero is set to the pericentre time T_P. Phases of primary (P) and secondary (S) eclipses are marked with vertical dotted lines and labelled.