[daip] AIPS. VTESS: mem mapping

[Alexey Nikonov]

Hello,

I`m writing to ask help in mem VTESS mapping. Can I?

I`ve self-calibrated and restored image of an extended source 1308+326 with
CLEAN in DIFMAP. So I know the estimate of noise level from this map.

Loaded to AIPS calibrated UV-file just to do VTESS mem deconvolution. Done
IMAGR with 0 iterations to obtain beam and dirty map.
As I know in CLEAN image results I`ve pick the same cellsize as in DIFMAP
and twice image size compared to source area, that can be seen in CLEAN
image.

After that VTESS couldn`t find a solution. Instead of extended structure I
can see only one Gaussian peak and noise.

I couldn`t find many recommendation to VTESS. Documentation says that noise
is crucial parameter, so I played with it, but nothing changed. Also played
with FLUX parameter and number of iterations.

Can you please help :)

-- 
Sincerely yours,
Aleksei Nikonov
AstroSpace Center,
Lebedev Physical Institute,
Moscow, Russia
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