# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0625029        0.00924062    
     0.460000          0.700000         0.0724760        0.00671601    
     0.700000           1.00000         0.0587303        0.00632916    
      1.00000           1.54000         0.0584762        0.00519137    
      1.54000           2.40000         0.0665154        0.00607049    
      2.40000           4.80000         0.0614985        0.00711543    
      4.80000           10.0000         0.0377060        0.00999084