# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.153758        0.00253263    
     0.460000          0.700000          0.144034        0.00216709    
     0.700000           1.00000          0.125226        0.00239625    
      1.00000           1.54000          0.119985        0.00229696    
      1.54000           2.40000          0.108002        0.00294490    
      2.40000           4.80000         0.0949651        0.00361658    
      4.80000           10.0000         0.0804997        0.00472776