# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.124079        0.00651844    
     0.460000          0.700000          0.125445        0.00506946    
     0.700000           1.00000          0.118621        0.00401216    
      1.00000           1.54000          0.122778        0.00298994    
      1.54000           2.40000          0.115807        0.00299036    
      2.40000           4.80000         0.0967690        0.00323644    
      4.80000           10.0000         0.0681403        0.00432593