strange results with high-DR oversampled source

[o-smirnov]

Trying to get a better model for 3C147 here... got some JVLA-A data -- the DR is about 10^5 so I tried to derive a highly oversampled model. Getting better results with CLEAN, and the MORESANE model looks strange -- why is it so bounded?

PyMORESANE command:

wsclean -niter 3 -scale 1.38888888889e-05 -name reduction-13Aug15/plots-3C147-LA-spw0/3C147-LA-spw0-s1-wsclean -weight briggs 0.00 -channelrange 0 43 -datacolumn CORRECTED_DATA -field 0 -pol I -gain 0.1 -threshold 0.001 -size 1024 1024 --moresane-ext ~/PyMORESANE/pymoresane/bin/runsane --moresane-arg '-sl 3 -sbr 128 -sps 100 -aog -nc' 3C147-LA.MS

CLEAN command:

wsclean -niter 20000 -scale 1.38888888889e-05 -name reduction-13Aug15/plots-3C147-LA-spw0/3C147-LA-spw0-s1-wsclean -weight briggs 0.00 -channelrange 0 43 -datacolumn CORRECTED_DATA -field 0 -pol I -gain 0.1 -threshold 0.001 -size 1024 1024 3C147-LA.MS

MS is /net/aretha/home/oms/VLA-3C147/3C147-LA.MS.

[JSKenyon]

I must be honest; I haven't the faintest idea why it fails so spectacularly in this case. Perhaps because 3C147 is so bright that any errors completely scupper the algorithm.