# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.240897        0.00318332    
     0.460000          0.700000          0.244301        0.00356702    
     0.700000           1.00000          0.286578        0.00452166    
      1.00000           1.54000          0.279641        0.00493526    
      1.54000           2.40000          0.250416        0.00562094    
      2.40000           4.80000          0.200657        0.00595788    
      4.80000           10.0000          0.163550        0.00707736