Observed SEDs of the five ALMA detections. In all the panels, the open triangles and squares represent the APEX/LABOCA and ALMA fluxes, respectively, while the asterisks represent the APEX/SABOCA data. Left and middle panels: we show the complete SEDs of LB14 and LB19. The red circles represent optical to mid-IR data from all our catalogues whenever available (see Sect. 2.3). The purple crosses in the LB19 panel represent IRAS data. Right panel: three ALMA detections with no infrared counterparts: LB08, LB10 and LB31. The APEX/LABOCA and ALMA detections are color-coded for each source. We have included the limiting magnitudes (black diamonds) of our infrared data.