# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0173936         0.0130646    
     0.460000          0.700000         0.0340847         0.0102262    
     0.700000           1.00000         0.0522601         0.0127127    
      1.00000           1.54000         0.0414102         0.0116874    
      1.54000           2.40000         0.0840764         0.0107003    
      2.40000           4.80000         0.0935906        0.00885329    
      4.80000           10.0000         0.0754384        0.00980205