# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0491230        0.00691221    
     0.460000          0.700000         0.0644793        0.00643841    
     0.700000           1.00000         0.0543226        0.00677898    
      1.00000           1.54000         0.0696062        0.00809942    
      1.54000           2.40000         0.0646632         0.0103547    
      2.40000           4.80000         0.0741136         0.0158868    
      4.80000           10.0000         0.0844467         0.0279818