# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.473132         0.0160522    
     0.460000          0.700000          0.517459         0.0151860    
     0.700000           1.00000          0.608303         0.0277165    
      1.00000           1.54000          0.699831         0.0529579    
      1.54000           2.40000          0.788567         0.0634522    
      2.40000           4.80000          0.534417         0.0705487    
      4.80000           10.0000          0.513782          0.150755