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        This task allows you to fit models directly through the uv visibili-
    ties. The models are either simple functions or linear  combinations  of
    simple  functions.   The results of the fitting process are the position
    offsets in R.A. and Dec (in arc second) of the  model  source  from  the
    phase reference center, and its flux (Jansky).  Depending on the fitting
    functions additional fit results are possible. Currently supported  dis-
    tributions and additional fit parameters are:

    POINT     Point source              : None
    E_GAUSS   Elliptic Gaussian source  : FWHM Axes (Major and Minor), Pos Ang
    C_GAUSS   Circular Gaussian source  : FWHM Axis
    C_DISK    Circular Disk             : Diameter
    E_DISK    Elliptical (inclined) Disk: Axis (Major and Minor), Pos Ang
    RING      Annulus                   : Diameter (Inner and Outer)
    EXPO      Exponential brightness    : FWHM Axis
    POWER-2   B = 1/r^2                 : FWHM Axis
    POWER-3   B = 1/r^3                 : FWHM Axis
    E_RING    Inclined Annulus          : Inner, Outer, Pos Ang, Ratio

Gildas manager 2018-03-17