[daip] tvstat

[Andy Biggs]

Hi there. I've been measuring flux densities of extended sources in maps 
made by IMAGR using TVSTAT. It appears to be the case at the moment that 
TVSTAT will not report the total flux density within a shaded region if 
the NITER keyword in the header is equal to zero. The maps I'm working 
with at the moment are VLA wide-field maps, the primary beam being covered 
with a large number of smaller maps. Many of the maps furthest away from 
the pointing centre contain weak extended sources which do not get CLEANed 
and at the moment therefore it isn't possible to derive their flux 
densities easily.

I presume that I can change the NITER keyword and make TVSTAT do what I 
want it to do, but is the behaviour described in the paragraph above 
correct?

Cheers,

Andy