Glycolaldehyde emission lines (in T_B scale) observed in the 1.3 mm and 1.4 mm spectral windows towards NGC 1333-SVS13A and excluded from the LTE analysis because of severe blending with other emission lines. The horizontal green dotted lines show the 3σ level. In blue we mark the glycolaldehyde transitions. The red line shows the synthetic spectrum obtained with the GILDAS-Weeds package (Maret et al. 2011) and assuming the rotation diagram solutions (see Fig. 3).