[daip] shifts in point sources

[Amy Mioduszewski]

gcastell at iafe.uba.ar wrote:

> yes, the images are in the same epoch. I have not a satisfactory
> explanation to the differences in the positions of the point sources in
> the VLA image (compared to the ATCA image). I was thinking in a way to
> correct the position of thoses sources using a task in AIPS (if there is a
> task to do it). Perhaps some task used in the mosaicing technique ...
> 

O.K., but I don't understand why you want to correct the positions of the 
sources if you don't know why they are different.  Particularly since they are 
randomly different.  Maybe the ATNF positions are wrong.

Yes, you could split out the sources and shift the coordinates of the maps.

Cheers,

Amy