# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0227788        0.00275438    
     0.460000          0.700000         0.0261783        0.00231236    
     0.700000           1.00000         0.0173091        0.00286132    
      1.00000           1.54000         0.0121877        0.00362482    
      1.54000           2.40000         0.0225008        0.00341892    
      2.40000           4.80000        0.00473102        0.00989713    
      4.80000           10.0000         0.0179620        0.00863350