Top panels: Spitzer/MIPS 24- and 70-μm images of the I05399/SMM 1-system. The images are shown with linear scaling, and the colour bars indicate the surface-brightness scale in MJy sr^-1. The images are overlaid with contours of SABOCA 350-μm dust continuum emission as in Fig. 1. In the left panel, the yellow arrow starts from the base of the HH 92 jet driven by I05399 (Bally et al. 2002). Bottom panel: Spitzer/IRAC three-colour composite image showing the I05399/SMM 1-system in the centre and part of the outflow features associated with the HH 92 jet. The 3.6, 4.5, and 8.0 μm emission is coded in blue, green, and red, respectively, and the colours are shown in logarithmic scales. The contours show the 350-μm emission as in the top panels. A scale bar indicating the 0.5 pc projected length is indicated. Note that the total length of the outflow, 34′, corresponds to 4.45 pc at 450 pc.