# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.391847        0.00333051    
     0.460000          0.700000          0.399273        0.00323781    
     0.700000           1.00000          0.336037        0.00413736    
      1.00000           1.54000          0.279086        0.00551781    
      1.54000           2.40000          0.320034        0.00682078    
      2.40000           4.80000          0.258854        0.00727290    
      4.80000           10.0000          0.160057        0.00884899