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Fig. 3

image

Comparison between the results of GASPHOT and GALFIT surface photometry for 1684 galaxies randomly extracted from the WINGS V-band catalogs. The comparison is made for apparent total magnitude, effective radius in arcseconds, effective average surface brightness, Sersic index, and axis ratio. The parameters in abscissa are averaged between the tools under comparison, while the differences between the values found by the tools are reported for each parameter on the ordinate, binned over the whole set of parameters. As in Fig. 2, the error bars represent the uncertainties of the median values of the differences in each bin, while the shaded bands give the semi-interquartile ranges of the deviation distributions.

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