Fit of the vertical surface-brightness (SB) profile of one radial bin of the galaxy Au5. Each small gray circle is the measurement for one Voronoi bin, while larger magenta circles correspond to the median profile of the gray points. The magenta shading indicates the 1σ dispersion of the gray points. Dashed blue and orange lines correspond respectively to the thin- and thick-disk fits, and the solid red line is a combination of the two.