Contour plots of χ² of MIRO observations compared to models. The χ² for the SubMM data is shown in the left-hand figure; the χ² for the MM data is shown on the right. χ² values have been normalized to the minimum value found in the fit, and the contours are shown for 1.1, 1.25, 1.5, 2, 3, and 4 times this minimum value. The scale for thermal inertia is logarithmic, but labeled with the values of the grid parameters. The L_A/L_T ratio models for the grid were computed on a linear scale. A (+) symbol is plotted at the location of the minimum value of χ² derived from fitting the grid data near the minimum. The error ellipse, corresponding to an increase in χ² of 5% above the minimum is shown.