Checks to trace potential systematic errors in our method. Top left: f_dust ≈ L_IR/L_bol as derived from integrating the observed SED plotted against f_dust derived from our fitted model SEDs. Top right: f_dust as derived from the MAGPHYS fits with (ordinate) and without the NUV data point. Red circles indicate galaxies with no UV data after removing the NUV band. Bottom: results for ξ_UV (left) and A_FUV (right) of the same run without the NUV flux.