# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.131702         0.0165793    
     0.460000          0.700000          0.145782         0.0105495    
     0.700000           1.00000          0.156626        0.00643822    
      1.00000           1.54000          0.172006        0.00357553    
      1.54000           2.40000          0.172306        0.00330526    
      2.40000           4.80000          0.170989        0.00378846    
      4.80000           10.0000          0.160531        0.00454475