[daip] Running task VTESS

[Eric Greisen]

Sayali Avachat wrote:
> Hello Sir, 
> 
> I want to run task VTESS on my CLEANed map. Dr. Perlman suggested me to 
> run this task on my final images of all the bands to get a smoother 
> image than what I have right now ( to reduce sidelobes especially)
> I read through the explain file for VTESS and from what I understand, I 
> used my cleaned map in INNAME and correspoding beam map in IN2NAME (both 
> are the outputs of IMAGR). I have convolved both to the same resolution. 
> other inputs used were - 
> NITER=100;
> NOISE=1sigma on INNAME
> FLUX= I tried zero and maximum of INNAME, putting zero, task does not 
> converge and I am not sure if even the other value is working.
> Do you think I am doing this right? 
> Please give me any hints for running it successfully or if you think 
> this is not the correct task to use for my target of getting smoother 
> image and reducing sidelobes.
> Also let me know if you want to look at actual outputs of VTESS that I 
> obtained.

VTESS is a deconvolution task - it is used on dirty images which IMAGR 
makes when NITER=0.  It is not used on maps that have been cleaned.

Tasks such as CONVL may be used to smooth a Cleaned image.

ERic Greisen