# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0751037        0.00303150    
     0.460000          0.700000         0.0809716        0.00283647    
     0.700000           1.00000         0.0750019        0.00309906    
      1.00000           1.54000         0.0677407        0.00288830    
      1.54000           2.40000         0.0622204        0.00333275    
      2.40000           4.80000         0.0612361        0.00440698    
      4.80000           10.0000         0.0413347        0.00624218