# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0911117         0.0290661    
     0.460000          0.700000         0.0350088         0.0349104    
     0.700000           1.00000         0.0786392         0.0103951    
      1.00000           1.54000          0.111275        0.00399691    
      1.54000           2.40000          0.133991        0.00308566    
      2.40000           4.80000          0.147600        0.00330058    
      4.80000           10.0000          0.139678        0.00506791