# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.161065        0.00281130    
     0.460000          0.700000          0.173428        0.00288650    
     0.700000           1.00000          0.178674        0.00383873    
      1.00000           1.54000          0.177579        0.00457654    
      1.54000           2.40000          0.175304        0.00698977    
      2.40000           4.80000          0.159663         0.0102177    
      4.80000           10.0000          0.127445         0.0202947