# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0852850        0.00195831    
     0.460000          0.700000         0.0991414        0.00174300    
     0.700000           1.00000          0.100200        0.00218798    
      1.00000           1.54000          0.104997        0.00180370    
      1.54000           2.40000          0.104138        0.00210429    
      2.40000           4.80000         0.0901610        0.00235505    
      4.80000           10.0000         0.0882048        0.00348466