Upper panels: continuum emission toward AzTEC-lup1-2, AzTEC-lup3-5 (ASTE, 1.1 mm), IRAS 15398-3359 and IRAS 16059-3857 (ALMA, 0.8 mm). Contours: 4, 10, 20 and 30 σ. Middle row panels: spectral energy distribution. A black-body could be fitted considering only the FIR and mm emission (black dashed line). The open blue dots corresponding to emission detected in the high resolution mm images are not included in the fit. The dust temperature derived from the fitting is shown in the top right corner. Bottom panels: line emission detected toward the sources at the position of the protostar.