Contour map of the emission of L1544 observed with NIKA at 1.25 mm (in blue) and 2 mm (in green) by Chacón-Tanarro et al. (2017), together with that observed with AzTEC at 1.1 mm (in red) and MUSTANG-2 at 3.3 mm (in black). The corresponding solid lines follow each 3σ contour, while the dashed lines follow the negative bowls formed due to filtering, indicating a −10% of the peak emission of each map. The HPBWs are on the bottom left corner of the figure.