Christopher deleted file Start of Casa settings validation.tex  about 10 years ago

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\section{Casa settings}  To ensure that our analysis is valid, we must first ensure that the settings used by CASA are correct. The two contentious settings are the Number of iterations of cleaning we go through and the threshold at which cleaning can end prematurely.  \subsection{Cleaning Iterations}  This setting is called 'niter' in CASA and 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 is kept at 0, the dirty image is output. We tested values between 1000 and 20000 and show additional iterations beyond 10 000 have little effect on the quality of the data.  The following graphs show results obtained with the same CASA configuration apart from the number of cleaning iterations.