# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0508796         0.0124267    
     0.460000          0.700000         0.0503444        0.00753193    
     0.700000           1.00000         0.0562462        0.00592864    
      1.00000           1.54000         0.0592565        0.00433696    
      1.54000           2.40000         0.0564749        0.00388699    
      2.40000           4.80000         0.0524255        0.00464506    
      4.80000           10.0000         0.0514320        0.00586358