Observed and model radial brightness profiles of the dust shell of U Hya in N60, WIDE-S, WIDE-L, and N160 bands. Ordinate and abscissa are brightness in units of MJy sr^-1 and apparent distance from the center projected on the sky in arcseconds, respectively. In each panel, dots indicate observations extracted from the bottom row images of Fig. 2 with all corrections taken into account. Open diamonds show statistical error estimates. Red, cyan, and yellow open squares display the best-fit models given in Table 3 for the annular areas of 40″–160″, 50″–150″, and 60″–140″, respectively.