Heat map of simulated maximum (disk is seen face on by observer) flare intensity (ΔI) for parameters of BeXRBs of Table 1 (see text for details), with a temperature profile of Eq. 3 and inner disk radius equal to the Be star radius. White contours indicate the observed ΔI (Table 2), while black contour are corrected assuming the disk is seen by some moderate inclination (i.e. 60°). Minimum R_out is the Be disk size and maximum should be ∼0.8R_sep which is roughly the Roche-lobe.