Procedure to fit the obtained uv-data with the Fourier Transform
of the following functions (see Fig. ): a point, a
circular Gaussian, an elliptical Gaussian, a circular disk, an
elliptical disk, a circular or elliptical ring, an exponential
brightness distribution, a distribution proportional to radius
,
and a distribution proportional to radius
. Some parameters can
be fixed by defining them in the option Parameters. They are
the offset R.A., offset Dec and flux for a point function, offset
R.A., offset Dec, flux and diameter for c_gauss, offset R.A.,
offset Dec, flux, major and minor diameter and position angle for
e_gauss, offset R.A., offset Dec, flux and diameter for c_disk,
offset R.A., offset Dec, flux, major and minor diameter and position
angle for e_disk, offset R.A., offset Dec, flux, inner diameter and
outer diameter for a ring, offset R.A., offset Dec, flux and diameter
for the functions called expo, power-2 and power-3.
The fitted function can be subtracted in a residual table (of
extension uvfit) that later can be plotted with UVSHOW (Sect. ).
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