** Next:** UV_FITC
** Up:** Description of Associated Tasks
** Previous:** UV_DFT
** Contents**
** Index**

##

UV_FIT

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, in such cases, sizes and
FWHMs are in arc seconds and position angles are in degrees, counting
from the North towards the East. Currently supported distributions 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
E_EXPO Elliptic exponential : FWHM Axes (Major and Minor), Pos Ang
POWER-2 B = 1/r^2 : FWHM Axis
POWER-3 B = 1/r^3 : FWHM Axis
U_RING Unresolved Annulus : Radius
E_RING Inclined Annulus : Inner, Outer, Pos Ang, Ratio
SPERGEL Spergel brightness profile : FWHM Axis, nu
E_SPERGEL Elliptic Spergel profile : FWHM Axes (Maj. and Min.), Pos Ang, n

Gildas manager
2020-04-01