Brightness temperature ratio () vs the equilibrium temperature (T_eq,0) of all of the available planets with secondary eclipses measured with Spitzer/IRAC. The blue line shows an ODR fit to the data with a slope significance of 3.1σ. Several functions were tested (see Sect. 4.2) and the model with the lowest BIC is plotted as a straight line. The orange shaded area shows the span of the ScCHIMERA model grid described in Sect. 3.4. The color scale is the effective temperature of the star.