Surface-brightness profiles in the UVOT W2, M2 and W1 bands (left) and SDSS, u, g, r, i, and z (right). All the profiles include NGC 3447A, extending from 80′′ to 140′′, as emphasised (bold) in the figure. The Sérsic fit of all the profiles provides n = 1.4. The model has been subtracted from the original profile and the residuals are shown in the bottom panels. The spike arising at 18′′, from r- to z-bands, corresponds to the bright Hα region North of the bar. Profiles are not corrected for galactic extinction and truncated when the error bars exceed 0.5 mag.
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