Plotting the Guide Star Catalog Using SAOimage and imgsc
This SAOimage display shows the alignment of HST Guide Stars with a test image with a world coordinate system. immatch can be run to list matches between HST Guide stars and sources found in the image.
![[WCSTools programs]](../wcspicon.gif)
![[Telescope Data Center]](http://tdc-www.harvard.edu/images/tdci.gif)
![[immatch Example]](../immatch/wcsimmatch.gif)