Upper left panel: SFR ratio, defined as in Fig. 7, estimated with LSST observations alone (red) and with LSST+IRAC observations (blue). The two samples disagree at low redshift, but the comparison improves at high redshift, highlighting the redshift dependence of the results. With the addition of MIR observations, the LSST-only estimates are consistent with the UV-IR estimates. Upper right panel: same comparison, but adding FIR SPIRE observations. In this case we did not fully remove the overestimation, which highlights that the problem lies in the lack of rest-frame MIR data. Lower left panel: same as in the other panels, but adding GALEX observations. We obtain a slight decrease in the overestimation. For this comparison we considered the ∼3000 objects that have a counterpart in the GALEX database. Lower right panel: M_star ratio evaluated with LSST observations alone (red) and with LSST+SPIRE observations (blue). The results are consistent with the ‘real’ ratio with a very low scatter.