Up: Description of Associated Tasks
UV_REF_POINT does a Phase and/or Amplitude Referencing of a UV ta-
ble, using another one representing a point source observed quasi-simul-
taneously. In details:
- UV_REF_POINT self-calibrates first the observed visibilities of the
Gaussian source used as reference, based on the knowledge of the
geometry and flux of this source. The self-calibration is baseline
based (i.e. it does not take into account closure relationships).
- UV_REF_POINT then applies the gains derived in previous
self-calibration to the visibilities of the source to be calibrated.
It is STRONGLY ADVISED to self-calibrate the phase first, then the am-
plitude using a longer smoothing time. Moreover UV_REF_POINT enables to
subtract (part of) the input reference source, typically to provide con-
tinuum-free spectral line maps.
See also UV_REF_GAUSS or UV_REF_MODEL, which does the same thing, but
using a Gaussian or modeled source as input.