[daip] 3C138 in aipsletter

[Crystal Brogan]

Ok, thats what I thought too, but wanted to double check.

thanks,
Crystal

Eric Greisen wrote:
> Crystal Brogan wrote:
>> Hi Eric,
>>
>> I noticed an entry under "uv-data matters" in the most recent AIPS 
>> note regarding a 0.25" position error for the 3C138 model image. I 
>> wondered if you could clarify a couple of things:
>>
>> (1) has the model image always had this offset since its original 
>> creation?
>>
>> (2) if you only used 3C138 for flux calibration (with this position 
>> error) in place, what is the likely magnitude of affect on data?
>>
>> Best,
>> Crystal
> 
> Amy can answer better than I - if I get this wrong.
> 
> I think the error has been there a long time - perhaps forever in the X 
> band model only.
> 
> But, if you used it for flux only, there should be essentially no error
> in the calibration.
> 
> Eric