To convert from pixels to RA and Dec. first view image with SAOimage . Set cursor on object of interest. Read pixel coord from SAOimage \ (coord must be on). Run skypix in separate window. Type pixel coords in skypix.
xr> xspatial
xs> skypix.oformat = ``hours'' # to reset the default which is ``degrees''.
xs> skypix
input coordinate system (J2000): xdata$rh110267_img # the image file name
output coordinate system (J2000): image # to use coord conversion
# in image file header
or B1950 or J2000 # epoch of output can be specified
input file list (STDIN): <cr>
...conversion explained, note epoch of output...
145 276<cr> # pixels read from SAOimage
22:08:41.6 45:44:38.0 # RA and dec.
256 265<cr>
22:07:16.8 45:42:00.0
ctrl d # to quit