# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0756203        0.00685084    
     0.460000          0.700000         0.0986372        0.00716198    
     0.700000           1.00000         0.0943674        0.00906171    
      1.00000           1.54000          0.134677         0.0126692    
      1.54000           2.40000          0.151080         0.0170358    
      2.40000           10.0000          0.108534         0.0403745