# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.121338        0.00425995    
     0.460000          0.700000          0.113965        0.00447434    
     0.700000           1.00000          0.106417        0.00570623    
      1.00000           1.54000          0.110693        0.00570439    
      1.54000           2.40000          0.102010        0.00812687    
      2.40000           10.0000         0.0786230         0.0113110