# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.232286        0.00747688    
     0.460000          0.700000          0.225618        0.00714992    
     0.700000           1.00000          0.208857        0.00749969    
      1.00000           1.54000          0.200704        0.00905239    
      1.54000           2.40000          0.172805         0.0124296    
      2.40000           4.80000          0.146505         0.0182545    
      4.80000           10.0000          0.154224         0.0327478