Best fitting model to star CS22942–019. Points with error bars: observed abundances, in black the elements used to determine the best fit and in grey the other elements. Red solid line: the best-fitting model, found with model set B and M_1,i = 1.8 M_⊙, M_2,i = 0.54 M_⊙ and M_PMZ = 2 × 10^-4M_⊙. Blue dashed line: alternative fit with model set B and M_1,i = 1.3 M_⊙, M_2,i = 0.61 M_⊙ and M_PMZ = 2 × 10^-3M_⊙ (see text). Green dotted line: best fit adopting model set A. Lower panel: the residuals of the three models are shown as red plus signs with error bars, blue triangles, and green dots, respectively.