FIT FixedValues
Keywords: imager

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FIT FixedValues

            Clean beam parameters can also be specified by the users, by loading
        the BEAM_SIZE array with values other than its default  values  (0,0,0).
        In this case, no automatic fit will be performed.

        In general, we discourage this usage, as it may result in a very improp-
        er flux scaling if the beam size is inappropriate. This mode  should  be
        reserved  to  special cases where the beam cannot be properly fitted, or
        to have a circular beam by taking as beam size the geometrical  mean  of
        the fitted major and minor sizes.

        Fixing  the  beam  size  should be associated to the FIT /JVM command to
        minimize (but not suppress !...) errors in total flux scaling.