National Radio
Astronomy Observatory

5.3.10 Parameter pbcor

The pbcor parameter controls whether the final .image is scaled to correct for the Primary Beam of the array or not.

If pbcor=False (the default), then no such scaling is done and the image is in whatever “raw” scaling used by the imagermode algorithm underneath. For single-field cleaning with imagermode=’’ or ’csclean’, this is the standard constant-noise image. If imagermode=’mosaic’, then this is the ’SAULT’ scaled image (regardless of what scaletype is set to).

If pbcor=True, the at the end of deconvolution and imaging the “raw” image is rescaled by dividing by the noise and PB correction image. This is what is output by clean as the .flux image.

Note that regardless of what you set pbcor to, you can recover the other option using immath (§ 6.5) to either multiply or divide by the .flux image.

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