Example of selected Mg_UV-selected galaxies at three different redshifts. For each galaxy the black line shows the observed spectrum, the red line the best fit from SPARTAN. We show with a light yellow strip the location of the Mg_UV index. When available, we also indicate the position of the D₄₀₀₀ break with a blue vertical strip. The two bottom plots contain galaxies with an assigned redshift quality flag of 1 and would have therefore been missed if low-redshift flag galaxies had been taken out of the selection from the beginning.