The synthetic SED and the SEDs calculated from the fitted parameters. The synthetic SED is represented by the blue solid line, with blue dots showing fluxes sampled at the Herschel wavelengths. The red solid lines show the SEDs calculated based on parameters when fitting to fluxes at all five wavelengths (in lightest red), the longest four wavelengths and the longest three wavelengths (in darkest red). The fitted temperature and the spectral index $\beta$ are written in corresponding colors. Mean values of the temperatures and $\beta$s in the toy line of sight are written in blue.