# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0670091        0.00476126    
     0.460000          0.700000         0.0687487        0.00399100    
     0.700000           1.00000         0.0603887        0.00520381    
      1.00000           1.54000         0.0569706        0.00630483    
      1.54000           2.40000         0.0888157        0.00764485    
      2.40000           4.80000         0.0532002         0.0102130    
      4.80000           10.0000         0.0964177         0.0154594