[daip] clean component tables

[Eric Greisen]

Andy Biggs writes:
 > Hello there.
 > 	I've been experiencing a few problems with CC tables, specifically
 > those read into AIPS from difmap. Some tasks appear to have great
 > difficulty in using them e.g. FRING which complains that not all the clean
 > components are the same size. Using UVSUB I was able to get it to work by
 > setting cmethod='DFT'. Leaving it blank caused the same problem as in
 > FRING. However, setting cmethod='DFT' in FRING did not solve the problem.
 > 	I then wrote out the difmap CC table to file using TBOUT and
 > edited this file in emacs, removing columns 4 to 7 which specify the
 > ellipticity, orientation etc of the components. Reading this back into
 > AIPS with TBIN and running FRING works fine. So there would appear to be
 > some problem with AIPS reading difmap CC tables, possibly related to the
 > additional columns, although the problem is not consistent within AIPS.

Martin has provided the necessary information your message did not.
AIPS does support Gaussians in the Clean Components files, but can
support them with gridded model subtraction only if all Gaussians are
of the same size and shape.

This means that FRING should have been able to do DFT modeling -
please provide the messages.

AIPS uses Gaussians (circular) to do multi-resolution Clean in IMAGR
and all modeling therefrom.

Eric Greisen