[daip] A&P selfcal

[Amy Mioduszewski]

Hi Farhad,

Eric is on vacation.  I don't really understand what you want to do.  
There is NOIFS which converts all IFs to a single spectrum. Will that do 
what you want?

Amy

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.
> Cheers,
> Farhad
>
>
>
> On 1/21/16 2:19 PM, Eric Greisen wrote:
>> On 01/21/2016 12:22 PM, Farhad Zadeh wrote:
>>> Hi Eric,
>>> Can you please let me know the best way to do amplitude self-cal on a
>>> cube that has multiple IFs and the central source (Sgr A*) varies as a
>>> function of frequency.
>>> It is not clear what the spectrum is.
>>> Do I need to split the cube into individual IF data sets  and then
>>> self-cal one by one and then put them back together?
>>>    Any suggestions would be appreciated.
>>
>> AIPS does not really have a good method for this.  You can make 
>> images of the source and of the spectral index with SPIXR.  Then you 
>> can divide the model into the data and solve for gains with OOCAL (a 
>> procedure). This has not been a well-tested route however.  
>> Separating the data by spectral window (IF) and using separate models 
>> and separate self-cals is certain to work.  If the source varies by 
>> this much I am not sure that you can put the IFs back together - 
>> SPIXR might help represent the multiple IFs in only 2 images however.
>>
>> OBIT and CASA both have more elaborate methods to handle this issue.
>> Whether they work well I cannot say.
>>
>> Eric Greisen
>>
>>
>
> _______________________________________________
> Daip mailing list
> Daip at listmgr.nrao.edu
> https://listmgr.nrao.edu/mailman/listinfo/daip