# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.148942        0.00472526    
     0.460000          0.700000          0.169803        0.00407491    
     0.700000           1.00000          0.194058        0.00497838    
      1.00000           1.54000          0.225532        0.00583544    
      1.54000           2.40000          0.258034        0.00796661    
      2.40000           4.80000          0.245444        0.00941772    
      4.80000           10.0000          0.270153         0.0151921