# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0202361        0.00453958    
     0.460000          0.700000         0.0186997        0.00438420    
     0.700000           1.00000         0.0405152        0.00524099    
      1.00000           1.54000         0.0400373        0.00535616    
      1.54000           2.40000         0.0479076        0.00765347    
      2.40000           4.80000         0.0802475        0.00918748    
      4.80000           10.0000         0.0617205         0.0146930