[daip] clean component filtering

[Amy Mioduszewski]

Hi Andy,

What are your inputs for CCEDT?

Also, I have used IMAGRPRM(8,9), and it worked, so maybe you didn't do something 
quite right there, although it is hard to tell from you description.

Amy

Andy Biggs wrote:
> Hi there. I'm having a difficult time at the moment with some map 
> making. I have a lot of maps to make and I want to do it in as 
> *automated* a fashion as possible. I am doing a wide-field deep clean at 
> 21cm and am using a fly's-eye faceting approach. The problem is that 
> some of the facets do not contain any sources which results in them 
> ending up with lots of weak, spurious clean components which I want to 
> exclude from CALIB (this is before each epoch is combined together with 
> STUFFR).
> 
> My favoured way of dealing with this would be to run CCEDT. However, it 
> seems that in those fields where all the clean components would be 
> (correctly) rejected, CCEDT doesn't do what I would like it to, and 
> which I think it should, which is to write out a new *empty* CC table.
> 
> I've tried various other approaches, such as flagging the entries using 
> TAFLG, but that caused CALIB to do some very strange things, mainly only 
> using a small and somewhat random number of the many fields. I've tried 
> running IMAGR with the filtering option (IMAGRPRM(8,9)) but this didn't 
> seem to do anything at all i.e. IMAGR didn't even begin (nothing 
> appeared in the MSGSRV and no activity was reported by 'top'). One thing 
> that sort of worked was to set field cards as 'F -1 -1 0 0' in BOXFILE 
> which prevented IMAGR placing a box in that field. However, you then 
> need to tell IMAGR the size of the field through IMSIZE and you can only 
> do this once i.e. if you have different sized fields (which I do) you 
> can't really do this. Also, you need to know in advance which fields 
> aren't going to have any sources.
> 
> Anyway, I was wondering if you agree that CCEDT should write out an 
> empty CC table if no components are selected? I think that that would 
> help me a lot.
> 
> Thanks,
> 
> Andy
> 
> p.s. I'm running a very recently midnight-jobbed version of 31DEC08 on a 
> MacBook Pro.
>