# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0748085        0.00302029    
     0.460000          0.700000         0.0805726        0.00308834    
     0.700000           1.00000         0.0763035        0.00426606    
      1.00000           1.54000         0.0933710        0.00507500    
      1.54000           2.40000         0.0912680        0.00850737    
      2.40000           4.80000         0.0766386         0.0153270    
      4.80000           10.0000          0.127139         0.0318489