Median system mass with 1σ uncertainty ranges derived when applying an artificial shift to the ESO-R measurement. The shifts were applied in both coordinates by uσ_cat toward (u >  0) or away from (u <  0) the model-predicted position, and the parameters K_ESO-R = 0.57 (open square boxes) or K_ESO-R = 1 (open circles) were used. The adopted value of M_tot given in Table 5 is shown as a filled square. For comparison, the 1σ uncertainty range (gray area) and the median value (solid horizontal line) computed without the ESO-R measurements are shown.