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\subsection{Cleaning Iterations}  This setting is called 'niter' The number of cleaning iterations ('\href{http://casa.nrao.edu/docs/UserMan/UserMansu297.html}{niter}') parameter  in CASA and simanalyze  defaults to 0. The definition can be found \href{http://casa.nrao.edu/docs/UserMan/UserMansu297.html}{in the CASA manual}. CASA will run the clean function on the image for at most niter minor cycles, so if niter If this  is kept at 0, simanalyze just returns  the dirty image is output. We tested values between 1000 and 20000 image. However, it can be increased,  and show additional iterations beyond 10 000 have little effect on represents  the quality maximum number  of cleaning cycles that  the data. image will be run through.  The following graphs show results obtained with graph shows  the same CASA configuration apart from effect of increasing  the number of cleaning iterations. cycles from 1000 to 20 000.