[daip] A&P selfcal

[Farhad Zadeh]

Hi Eric,
Thanks. I have been using VBGLU. It is slow as I need to use only four 
IFs at a time but it worked adding 61 IFs.

I imaged the P selcalled  data and found the  peak flux. I fed the peak 
flux of the source  and then ampl self called.
At the end all IFs were A and P selfcalibrated showing the flux 
increasing with increasing IFs.
I then used IMFImager in Obit to make maps of individual IFs.
It was tedious but looks like it worked.
Thanks,
Farhad


the P selfcal data sets

On 4/27/16 4:04 PM, Eric Greisen wrote:
> On 04/21/2016 09:24 AM, Farhad Zadeh wrote:
>> Hi Eric,
>> I am back doing things in aips. A simple question. Is there a way to
>> make a cube of a bunch of UV data sets corresponding to
>> different IFs? I am doing things the hard way, self cali in amp for
>> indivifdual IFs and then need to put together to make images adding in
>> the spectral index in the imager. I appreciae. There should be something
>> like UVcube like MCUBE.
>
> To put IFs back together as IFs use VBGLU
>
> You need to use models that have appropriate fluxes at each IF - if 
> you use only one model the spectral index will be removed (at least at 
> the central channel of each IF).  IMAGR can do spectral index 2 ways - 
> the easy way is to set IMAGRPRM(2) to an average spectral index of the 
> whole field which corrects the data as they are written to the work 
> file.  The harder/slower way is to make images of spectral index with 
> SPIXR (using your best images at each IF) and to specify IN3NAME to 
> point at the spectral index image plus IMAGRP(17).
>
> Eric Greisen
>