Spectral Extraction of Point Sources

input file: xdata$rp110590.00.qp

output files: rp90_obs.tab, rp90_soh.tab, rp90_boh.tab

  cl> xray
  xr> xspectral
  xs> qpspec
  source qpoe file:  xdata$rp110590                  # No *.qp extension is needed
  source region descriptor:  c 6930 9390 240           # A 240 pixel radius circle
                                                           # centered at 6930,9390
  background qpoe file: xdata$rp110590                   # From the same QPOE file
  bkgd region descriptor:  a 6930 9390 300 600  # an annulus centered at 6930,9390
                                   # with inner and outer radii 300 and 600 pixels
  root name for output file [root_obs.tab]:  rp90    # rp90_obs.tab, rp90_soh.tab,
                                                                    # rp90_boh.tab

If the user wants to specify a different normalization for background subtraction, or a systematic error, it must be done when using qpspec (see the qpspec help file).