Simulation of the detection and retrieval of PSF parameters FWHM and β, and determination of the accuracy of the model fits for the total flux of a source. The blue points show the individual simulation results, and the red points show the median values, binned in A/rN. The upper and lower parts of the red region indicate the 86th and 16th percentile, respectively. Top row, first panel: delta [O III] flux. Top row, second panel: delta M₅₀₀₇. Top row, third panel: delta FWHM. Top row, fourth panel: delta β. Top row, fifth panel: delta radial velocity derived from wavelength position. Top row, sixth panel: delta velocity dispersion of the [O III] emission lines.