# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0138400         0.0138127    
     0.460000          0.700000        0.00984739         0.0171400    
     0.700000           1.00000         0.0172581         0.0230098    
      1.00000           1.54000         0.0522139         0.0179712    
      1.54000           2.40000         0.0232814         0.0335987    
      2.40000           10.0000         0.0325231         0.0226257