# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.218458        0.00220581    
     0.460000          0.700000          0.226681        0.00225916    
     0.700000           1.00000          0.215849        0.00275710    
      1.00000           1.54000          0.204291        0.00286420    
      1.54000           2.40000          0.193552        0.00348896    
      2.40000           4.80000          0.172317        0.00411661    
      4.80000           10.0000          0.143756        0.00594623