Fig. 3.
Left column: UCD 1D profiles of the mean isophotal intensity versus radius in the g-band (first row) and z-band (second row) filter. The data is shown with the black dotted line, the King model fit in red, and the Sérsic model fit in blue. The two-component fits are shown in cyan (King + Exponential) and magenta (King + Sérsic). Right column: Relative residual profiles for the four different models. Above ≳5″ the flux drops to the background level, creating noisy radial residuals.
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