Deviation of the 4.5 μm eclipse depth from the 3.6 μm blackbody propagated to 4.5 μm vs. equilibrium temperature (computed with zero albedo and full redistribution). Several functions were tested (see Sect. 4.3) and the model with the lowest BIC is plotted as a bilinear with a knee. The color bar presents the stellar effective temperature. The dashed horizontal line indicates a zero deviation, meaning that the eclipses are consistent with a blackbody. The orange shaded area represents the span of the fiducial forward ScCHIMERA models described in Sect. 3.4.