# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0707182        0.00385081    
     0.460000          0.700000         0.0704709        0.00465769    
     0.700000           1.00000         0.0785410        0.00537282    
      1.00000           1.54000          0.108486        0.00629139    
      1.54000           2.40000          0.122325        0.00946974    
      2.40000           4.80000          0.121995         0.0138300    
      4.80000           10.0000          0.153949         0.0227220