# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0296009        0.00864376    
     0.460000          0.700000         0.0475052        0.00741659    
     0.700000           1.00000         0.0258886         0.0117925    
      1.00000           1.54000         0.0688314        0.00796504    
      1.54000           2.40000         0.0498115         0.0131871    
      2.40000           10.0000         0.0548531         0.0179889