# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.380271        0.00356833    
     0.460000          0.700000          0.374444        0.00324484    
     0.700000           1.00000          0.401804        0.00368887    
      1.00000           1.54000          0.342869        0.00281408    
      1.54000           2.40000          0.251377        0.00292527    
      2.40000           4.80000          0.144740        0.00300859    
      4.80000           10.0000         0.0898366        0.00360998