# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.158079        0.00692765    
     0.460000          0.700000          0.170594        0.00710330    
     0.700000           1.00000         0.0973189        0.00860660    
      1.00000           1.54000          0.126503         0.0103496    
      1.54000           2.40000          0.218479         0.0144250    
      2.40000           4.80000          0.268764         0.0129067    
      4.80000           10.0000          0.203116         0.0156892