Imaging Tasks Overview

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The current imaging and deconvolution tasks are:

clean — calculate a deconvolved image with a selected clean algorithm, including mosaicing, or make a dirty image (§ 5.3),
feather — combine a single dish and synthesis image in the Fourier plane (§ 5.5),
deconvolve — image-plane only deconvolution based on the dirty image and beam, using one of several algorithms (§ 5.8).

There are also tasks that help you set up the imaging or interface imaging with calibration:

boxit - create “cleanbox” deconvolution regions automatically from an image (§ 5.6.1),
ft - add a source model to the MS (§ 5.7).

The full “tool kit” that allows expert-level imaging must still be used if you do not find enough functionality within the tasks above.

Information on other useful tasks and parameter setting can be found in:

listobs — list whats in a MS (§ 2.2.6),
split— Write out new MS containing calibrated data from a subset of the original MS (§ section:cal.split),
cvel — regrid a spectral MS onto a new frequency channel system (§ 4.7.6),
data selection — general data selection syntax (§ 2.3),
viewer — image display including region statistics and image cube slice and profile capabilities (§ 7).

More information about CASA may be found at the CASA web page