This SAOimage display shows only the test image, but you can still identify stars in the image, since it has a world coordinate system. immatch can be run to list matches between USNO-SA2.0 stars and sources found in the image. The command used to display the image, before the [ and ] keys turned off the catalog plotting, was
saousa2 test.ftswhere saousa2 is
saoimage -reg `imusa2 -r 10 $1` -wcscom susa2_-ha_%s $*Clicking the w key on the star closest to the center returns the following:
susa2 2.5, 8 December 1998, Doug Mink SAO Find closest star USNO SA2 number RAJ2000 DecJ2000 MagB MagR Plate Arcsec 1575.00498740 09:55:20.637 +69:00:16.81 19.0 18.2 38 1.65