Ellipses where the emission has been averaged for the 1.2 mm and 2 mm maps superimposed on the 1.2 mm continuum map of L1544. Only the colored region is included in the average. The resolution is 19′′ (HPBW shown by the black circle in the bottom right corner). For Herschel/SPIRE the distance between concentric ellipses is larger, due to a larger pixel size and resolution. For both NIKA and SPIRE, the distance between ellipses is chosen to be ~1.8 pixels, averaging in a 1 pixel wide ring.