Stellar mass and dust attenuation plane showing the HELM sources and the HELM selection criterion (solid red line). For the stellar mass and dust attenuation, we show the median value of the median outputs of each SED set-up. The HELM selection was performed on the multi-parameter probability distribution and not on the point estimates of the physical properties, so the median value shown here can be slightly out of the selection if one of the SED runs has a median output distant from the HELM selection. The two side panels show the number density of the HELM samples before and after the selections of Table 1.