# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.191051        0.00202215    
     0.460000          0.700000          0.187168        0.00209494    
     0.700000           1.00000          0.182049        0.00275845    
      1.00000           1.54000          0.171117        0.00314195    
      1.54000           2.40000          0.157763        0.00504061    
      2.40000           4.80000          0.138013        0.00764559    
      4.80000           10.0000          0.136739         0.0133249