"Cyg X-2"
  E(keV)    dE(keV)   F(ph/(cm^2.s.keV))   Error(1 sigma)
   31.50      4.75        8.64e-05        6.78e-06
   42.75      6.50        5.33e-06        3.56e-06
   57.75      8.50        2.94e-17        5.41e-06