# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.113076         0.0104514    
     0.460000          0.700000          0.122124         0.0113389    
     0.700000           1.00000          0.108485         0.0122007    
      1.00000           1.54000          0.135301         0.0146098    
      1.54000           2.40000          0.147843         0.0196574    
      2.40000           4.80000          0.178159         0.0393260    
      4.80000           10.0000          0.124238         0.0873458