# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.320417        0.00471645    
     0.460000          0.700000          0.328572        0.00463736    
     0.700000           1.00000          0.386882        0.00572199    
      1.00000           1.54000          0.581429         0.0106258    
      1.54000           2.40000          0.618177         0.0168912    
      2.40000           4.80000          0.485162         0.0242842    
      4.80000           10.0000          0.343350         0.0519792