SEDs of IC 2531 with the BARE-GR-S dust mixture based on the BVR fit (black solid line) and the BVRJHK3.6 fit (red dashed line). The coloured markers with error bars correspond to the flux densities listed in Table 3. The bottom panel below the SEDs shows the relative residuals between the observed SEDs and the models. The cyan spread corresponds to the BVR fit and the magenta spread relates to the BVRJHK3.6 fit. The spreads are plotted for the models within one error bar of the best oligochromatic fitting model parameters.