# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.104977        0.00143113    
     0.460000          0.700000          0.113242        0.00144497    
     0.700000           1.00000          0.119180        0.00175033    
      1.00000           1.54000          0.124429        0.00193128    
      1.54000           2.40000          0.122175        0.00294363    
      2.40000           4.80000          0.124466        0.00400971    
      4.80000           10.0000          0.120330        0.00653060