Emission brightness profiles of the first cut (see Table 2) at 70 μm a); 160 μm b); 250 μm c); 350 μm d); and 500 μm e); and extinction profile calculated from the 2MASS data with R_V = 3.1 f). The same for the second cut g)–l); the third cut m)–r); and the fourth cut s)–x). The red lines show the second order polynomials fitted to remove the relatively diffuse envelope from the densest filament.