[daip] JMFIT

[Leonia Kogan]

Hi Andy,

I think that the fact that the deconvolved sizes are very, very small is
the demonstration of right job of JMFIT when the bandwidth is small in 
comparison with the center frequency.

If the component is actual point source it is seen as the Clean beam and 
being deconvolved with the clean beam JMFIT returns the zero width.

Using BWSMEAR.NE.0 JMFIT carries out the deconvolution using something 
different (not Clean beam) and this can lead to some difference.

Leonia

Andy Biggs wrote:
> Hi there. I have a question regarding JMFIT. If I fit a point source using 
> GWIDTH=0 and DOWIDTH=-1, the deconvolved size is (correctly) reported as 
> 0.0. If I repeat the fit exactly as before, but this time with BWSMEAR set 
> to a non-zero value, the deconvolved sizes are no longer exactly equal to 
> zero. They are very, very small, but not zero. I was wondering if this was 
> the expected behaviour.
> 
> Andy
> 
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