# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0537332        0.00759621    
     0.460000          0.700000         0.0543351        0.00770072    
     0.700000           1.00000         0.0611831        0.00874612    
      1.00000           1.54000         0.0801991        0.00880088    
      1.54000           2.40000          0.104678         0.0102363    
      2.40000           4.80000          0.125062         0.0150450    
      4.80000           10.0000          0.128129         0.0233495