# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0906745       0.000991963    
     0.460000          0.700000          0.106408       0.000959560    
     0.700000           1.00000          0.112941        0.00108354    
      1.00000           1.54000          0.119494        0.00142581    
      1.54000           2.40000          0.110257        0.00190734    
      2.40000           4.80000          0.130928        0.00264767    
      4.80000           10.0000          0.101425        0.00436300