Fig. 1. Mosaic of six images of the Orion bar area (shown in detector coordinates, a clockwise rotation of 10.4^o is needed to display the real sky orientation; see Fig. 2 for the equatorial coordinates). Top row: (left) an image at 5.01 µm ,  Ori A is visible in the middle left of the image; (centre) the Orion bar at the AIB wavelength of 6.2 µm ; (right) image at 9.5 µm (the wavelength of one of the silicate features), note that  Ori A is again visible. Bottom row: (left) image at the AIB wavelength of 11.3 µm  and (centre) image at 12.7 µm  (ISOCAM's CVF resolution blends [Ne II ] and the 12.7 µm  AIB feature); image at 15.6 µm (right) , wavelength of the [Ne III ] forbidden line.