# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.164531        0.00141329    
     0.460000          0.700000          0.170550        0.00142830    
     0.700000           1.00000          0.158540        0.00172507    
      1.00000           1.54000          0.151900        0.00190046    
      1.54000           2.40000          0.144139        0.00285155    
      2.40000           4.80000          0.142609        0.00381091    
      4.80000           10.0000          0.137161        0.00583764