# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.198803        0.00686947    
     0.460000          0.700000          0.183362        0.00614428    
     0.700000           1.00000          0.164522        0.00743954    
      1.00000           1.54000          0.174523        0.00677010    
      1.54000           2.40000          0.181750        0.00688860    
      2.40000           4.80000          0.170105        0.00719485    
      4.80000           10.0000          0.139736        0.00791581