Fig. 7. Map of the intensity of the broad 9.7 µm  band of amorphous silicates (contours) superimposed on the 15.5 µm  continuum map (grey scale). Note the bright silicate emission around  Ori A (cross). The contours correspond to integrated band intensities from 0.25 to 0.7 erg s^{- 1} cm^-2 sr^-1 by steps of 0.05; the gray image spans from 1 to 80 Jy/pixel.