# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0162609         0.0110607    
     0.460000          0.700000         0.0407734        0.00784061    
     0.700000           1.00000         0.0519263         0.0115056    
      1.00000           1.54000         0.0574385        0.00840666    
      1.54000           2.40000         0.0690640        0.00761744    
      2.40000           4.80000         0.0564366        0.00604843    
      4.80000           10.0000         0.0526331        0.00700521