# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0424791        0.00578598    
     0.460000          0.700000         0.0360680        0.00531063    
     0.700000           1.00000         0.0297107        0.00686501    
      1.00000           1.54000         0.0134632        0.00587566    
      1.54000           2.40000         0.0367048        0.00673419    
      2.40000           10.0000         0.0318881        0.00678803