PACS blue channel (70 μm) combined map of the undetected Class II objects. The map is 30″ in size along each axis. The beam size is represented by the yellow circle in the bottom, right-hand corner and the black star marks the peak position in the map. Contour levels are plotted at 4, 5 and 6σ. The scale bar shows the intensity of the map in mJy/pixel.