Plotting the USNO-A2.0 Catalog
Using SAOimage and imua2

[HST GSC] [USNO-A2.0] [2MASS PSC] [USNO-SA1.0] [USNO-SA2.0] [labelled] [unlabelled] [no stars]

image with no USNO-A2.0 stars

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-A2.0 stars and sources found in the image. The command used to display the image, before the [ and ] keys turned off the catalog plotting, was 

saoua2 test.fts -zoom 0.5 -histeq
where saoua2 is 
saoimage -reg `imua2 -r 10 $1` -wcscom sua2_-ha_%s $*
Clicking the w key on the star closest to the center returns the following: 
sua2 2.5, 8 December 1998, Doug Mink SAO  Find closest star
USNO A2 number  RAJ2000       DecJ2000   MagB  MagR Plate  Arcsec
1575.03025735 09:55:23.431 +69:00:49.26  16.4  16.9   38      2.00

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