# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0367039         0.0183757    
     0.460000          0.700000         0.0169137         0.0177721    
     0.700000           1.00000         0.0202414         0.0125631    
      1.00000           1.54000         0.0109497         0.0238655    
      1.54000           2.40000         0.0178400         0.0324138    
      2.40000           4.80000          0.147497         0.0125395    
      4.80000           10.0000          0.108370        0.00814223