# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0738670        0.00603418    
     0.460000          0.700000         0.0690444        0.00641354    
     0.700000           1.00000         0.0700420        0.00922763    
      1.00000           1.54000          0.101574         0.0110045    
      1.54000           2.40000          0.105724         0.0131836    
      2.40000           4.80000         0.0918688         0.0135724    
      4.80000           10.0000          0.110234         0.0205476