X-ray luminosity as a function of emission-measure-weighted thermal energy kТ_av (left panel) and the two temperatures and emission measures (right panel). The EMDs used for generating these grids are composed of time-averaged COs covering from 10 to 100% of the total corona and FLs of Class С and Class M, time-averaged over their evolution and varying from 0 to 15% of the area of the COs. The Class M flares were also observed with Yohkoh with a pair of soft filters in addition to the pair of hard filters (used for the analysis of the Class С flare). The coding of the plots follows Fig. 3.