# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0859248        0.00213169    
     0.460000          0.700000         0.0944020        0.00220298    
     0.700000           1.00000         0.0930716        0.00295486    
      1.00000           1.54000         0.0969376        0.00339479    
      1.54000           2.40000         0.0928200        0.00590519    
      2.40000           4.80000         0.0900670         0.0102500    
      4.80000           10.0000          0.114187         0.0201330