Parameter gain

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5.3.3 Parameter gain

The gain parameter sets the fraction of the flux density in the residual image that is removed and placed into the clean model at each minor cycle iteration. The default value is gain = 0.1 and is suitable for a wide-range of imaging problems. Setting it to a smaller gain per cycle, such as gain = 0.05, can sometimes help when cleaning images with lots of diffuse emission. Larger values, up to gain=1, are probably too aggressive and are not recommended.

Figure 5.1: Close-up of the top of the interactive clean window. Note the boxes at the left (where the iterations, cycles, and threshold can be changed), the buttons that control add/erase, the application of mask to channels, and whether to stop, complete, or continue cleaning, and the row of Mouse-button tool assignment icons.

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