Fits file re-alignment I would like to re-align an image using a reference image (taken from GAIA). I am aware of the software Koords developed by the Karma team: https://www.atnf.csiro.au/computing/software/karma/

Unfortunately, the software crashes (with segmentation fault) everytime I try to add a source in either image. Is there a more up-to-date version of this tool? Or simply a different tool?

Update: Thank you for the responses! I will try to better explain exactly what I am trying to do :)

I have an X-ray image taken from Chandra and a GAIA-Aligned HST image. I know that the pointing for the X-ray image is off by ~.5 arcsec or so. I want  to re-align the X-ray image so that any X-ray point sources match their optical counter parts using the GAIA-Aligned HST image as my reference.  I hope this helps!
I ended up making my own small code that you can find here: 
     https://github.com/crhea93/AstronomyTools/blob/master/Astrometry/Correction.py

Essentially, after inputting at least 3 matching target (found by eye in DS9 for example), the program will calculate the mean offset and apply it to the target image. The output is a new fits file of the target image with the proper correction.