# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.518604        0.00398077    
     0.460000          0.700000          0.518563        0.00298109    
     0.700000           1.00000          0.494051        0.00351568    
      1.00000           1.54000          0.495634        0.00288012    
      1.54000           2.40000          0.464523        0.00292371    
      2.40000           4.80000          0.353859        0.00278951    
      4.80000           10.0000          0.212519        0.00317545