# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0521872        0.00336839    
     0.460000          0.700000         0.0374625        0.00345911    
     0.700000           1.00000         0.0414726        0.00314269    
      1.00000           1.54000         0.0316122        0.00359869    
      1.54000           2.40000         0.0455713        0.00506032    
      2.40000           4.80000         0.0640456        0.00532503    
      4.80000           10.0000         0.0169747        0.00929774