C1, C2, and C3 clumps in the field of G319.88+00.79. The underlying grey image is the column density map. The apertures used to integrate the column density and estimate the masses are indicated (red contours; these apertures follow the level at half peak-values, after correction for a background emission). The green contours correspond to column densities of 1, 2, 4, and 6 × 10²² cm^-2 (as in Fig. 7d).