# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.157691        0.00247207    
     0.460000          0.700000          0.153082        0.00193446    
     0.700000           1.00000          0.134806        0.00240062    
      1.00000           1.54000          0.127850        0.00180289    
      1.54000           2.40000          0.120819        0.00176335    
      2.40000           4.80000          0.111038        0.00192541    
      4.80000           10.0000         0.0884585        0.00248060