*imcnts* - Find background subtracted counts for a point source

input file: xdata$rp110590.qp

output file: rp90_cnt.tab

  xi> xspatial                                         # Load the spatial package
  xs> imcnts                                      # Run the task to count photons
  source image file:  xdata$rp110590.qp       # Input file, use complete filename
  source region descriptor:  c 6930 9390 240                # Circle at 6930 9390
                                                      # with radius of 240 pixels
  background image file or cts/pixel: xdata$rp110590.qp      # From the same file
  bkgd region descripton: a 6930 9390 300 1500
                                           # Annulus  of 300 to 1500 pixel radii,
                                          # centered at the point source position
  root name for output file [root_cnt.tab]: rp90                   # output table
                                                                   # rp90_cnt.tab