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Tools used in this document

The data reduction categories covered in this document are those for continuum data, continuum polarimetry and spectral-line data. Individual steps in each data reduction sequence are illustrated using Glish scripts. The reduction sequences given in this document use the following AIPS++ tools:

vlafiller

is used to load VLA archive uv data into an AIPS++ format called a Measurement Set (MS). The MS is stored on disk as a directory with a ``table'' name specified by the user, e.g. 3C273.ms.

ms

is used to access uv-data in a Measurement Set, and to list and summarize visibility data.

flagger

is used to select and flag uv-data in a Measurement Set.

msplot

is used for plotting and interactively editing visibility data. It is also useful to investigate and edit the data between calibration cycles.

calibrater

is used to solve for uv-plane calibration effects, apply calibration corrections to the observed data, and plot calibration solutions.

imager

is used to image (e.g. Fourier transform, deconvolve, restore) the data in the Measurement Set.

image

is used for image analysis, e.g. fitting 1-D profiles or 2-D models to images, creating moment maps, regridding images.

viewer

is used to display images and create publication quality postscript renderings of them. In addition, image tool statistics are available from within the viewer. The viewer is also used to create CLEAN deconvolution regions or masks.