The Rosette sub-field (9′  ×  9′) is shown as as the observed images ℐ_λO at 70, 160, 250, 350, 500 μm (left to right, top to bottom) with the extraction ellipses (FWHM) of only measurable sources (F_iλ   P > σ_iλ   P and F_iλ   T > σ_iλ   T) overlaid, as well as the composite 3-color RGB image (500, 250, 70 μm) created using the images ℐ_λM of the deblending shapes of each extracted source (lower-right). The default condition, that a tentatve source must be detected in at least two bands, was used. Most of the compact sources visible at 70 μm are unresolved protostars; several groups of them, discussed in Sect. 3.2, are labeled A–F. For better visibility, the values displayed in the panels are somewhat limited in range; the color coding in the lower-right panel is linear, in the other panels it is a function of the square root of intensity in MJy/sr.