# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.416905        0.00754859    
     0.460000          0.700000          0.419906        0.00781894    
     0.700000           1.00000          0.498958        0.00962035    
      1.00000           1.54000          0.655717         0.0173823    
      1.54000           2.40000          0.605013         0.0238618    
      2.40000           4.80000          0.488837         0.0393351    
      4.80000           10.0000          0.307566         0.0904605