# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.100867        0.00372589    
     0.460000          0.700000         0.0938834        0.00340003    
     0.700000           1.00000         0.0914799        0.00343816    
      1.00000           1.54000         0.0812478        0.00276629    
      1.54000           2.40000         0.0603820        0.00326129    
      2.40000           4.80000         0.0420598        0.00402858    
      4.80000           10.0000         0.0391437        0.00584567