# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.311283        0.00547899    
     0.460000          0.700000          0.313223        0.00431252    
     0.700000           1.00000          0.333379        0.00456302    
      1.00000           1.54000          0.321158        0.00379669    
      1.54000           2.40000          0.304501        0.00484029    
      2.40000           4.80000          0.211606        0.00489246    
      4.80000           10.0000          0.113301        0.00510780