Properties of the best-fit models (assuming no surface spots) of the lightcurves for option I (spacecraft-orbit-averaged BRITE photometry, upper left quadrant), option II (binned BRITE lightcurve, upper right quadrant), and option III (binned SMEI lightcurve, lower left quadrant). For each option, the panels illustrate the fit quality, the astrometry-based luminosity ABL (see text), and the total mass of the system as a function of the secondary filling factor. The blue hatched area in the ABL panels indicates the value of ABL_DR2 and its associated uncertainty. The lower right panel of each quadrant compares the lightcurve with the fit with the lowest χ² that also agrees with the value of ABL_DR2 (see Table 2).