Read a ds9 marker file made for some FITS image. Center the apertures using Peak Finding algorithm and write a new marker file using the revised centers.
% xyds9pf.sh ast1.fits t1.reg any any % xymake_circles.py xyreg_for_py > new.regIn this example, the original region file was "t1.reg". We used any type and color marker from this file. The computed sets of new centers were written to the file "new.reg". We use the python code xymake_circles.py to create the final file.