Examples of modified blackbody fits: the observed points are the red crosses whereas the modelled points are the filled blue circles. Upper limits are indicated with red diamonds. The bottom panel of each plot indicates the residuals from the fit. Top: fit for Haro 3, the observed 70 μm point which is not considered at first in our fitting procedure, is above the modelled one. Centre: fit for Mrk 209. Here the observed 70 μm point is below the modelled one, and the fit should be redone, giving us: Bottom: fit for Mrk 209 using the 70 μm point. Note how the shape of the modified blackbody varies between the two: for example, the dust temperature for Mrk 209 goes from 56 K (without 70 μm) to 33 K (with 70 μm).