Flux bias corrections for the GAMA spectroscopic sample. The distribution of flux ratios $f_i^{\alpha }$ (model flux divided by observed flux) for the best-fitting spectral template at spectroscopic redshift. Each panel shows the $f_i^{\alpha }$ distribution for different passbands. The area under the histograms is normalised to unity. The blue-shaded region shows the flux bias before any corrections. The black line shows the flux bias $f_i^{\alpha }$ distribution after corrections. The flux bias correction is defined with Eqs. (18)–(20). See Sect. 4 for a detailed description of the flux and flux uncertainty corrections. As expected, the flux bias correction shifts the distribution median closer to unity (dashed vertical line). Table 1 shows the flux bias correction values for each passband.