# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0389817        0.00635567    
     0.460000          0.700000         0.0716323        0.00634367    
     0.700000           1.00000         0.0982131        0.00949151    
      1.00000           1.54000          0.132455         0.0147113    
      1.54000           2.40000          0.183130         0.0220019    
      2.40000           4.80000          0.233316         0.0437881    
      4.80000           10.0000          0.399328         0.0880468