Ellipticity and position angle as a function of distance from the galaxy center along the major axis, from XVISTA surface photometry. Red open squares are from the analysis of the r image, blue open triangles are from the g image. Each plotted point is the mean of the considered quantities over a radial range of  ±10 px  ≃  ± 2.2″ around the position of the point, the errorbars are the associated standard deviations (as in Federici et al. 2007). In the lower panel we plotted only points having uncertainties in PA lower than 30°. Continuous horizontal lines mark the average levels of the parameters considered in each panel; the corresponding values are also reported.