20.13 UV_CIRCLE

[ADVANCED\]UV_CIRCLE [x0 y0 Rota Incli] [/SAMPLING QSTEP [Unit [QMIN QMAX]]] [/ZERO [Flux]]

Compute a UV table containing the radial distribution of the azimutal average of the visibilities after deprojection for inclination and orientation (Incli, Rota, in Degrees) around a specified center (x0,y0 in Radians). All arguments default to 0. ROTA is here the position angle of axis of (assumed) rotational invariance of the object. Thus, when using results from UV_FIT one should use ROTA = PA-90, where PA is the Position Angle of the Major axis.

The resulting UV table have visibilities only with V values equal to 0, so that the U values contain the radial distance in the UV plane. This is convenient to display the azimutal average of the visibilities as a function of UV distance, but cannot be used for further imaging.

See UV_RADIAL if you want to image the circular average of the brightness distribution.