National Radio
Astronomy Observatory

5.3.7 Parameter minpb

The minpb parameter sets the level down to which the primary beam (or more correctly the voltage patterns in the array) can go and have a given pixel included in the image. This is important as it defines where the edge of the visible image or mosaic is. The default is 0.1 or equivalent to the 10% response level. If there is a lot of emission near the edge, then set this lower if you want to be able to clean it out.

NOTE: The minpb parameter is the level in the “primary beam” (PB) at which the cut is made. If you are using ftmachine=’mosaic’ (§ 5.3.4.3), this will show up in the .flux.pbcoverage image (new in version 2.4.0). See the discussion of threshold (§ 5.3.4.6) for related issues.

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