Left: 3 mm continuum emission map of the IRAS4A region (grey scale and black contours). The contour levels of emission are traced at 5 and 8σ levels and increase in steps of 10σ, where σ = 2 mJy beam^-1. The positions of the continuum sources at 1.3 mm are marked in green. The PdBI synthesised beam (HPBW) of the continuum map is shown. Right: 1.3 mm continuum map of IRAS4A. Contour levels and labels are the same as in the left panel. The rms noise is σ = 8 mJy beam^-1.