# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0614402        0.00180518    
     0.460000          0.700000         0.0568165        0.00157692    
     0.700000           1.00000         0.0518791        0.00159524    
      1.00000           1.54000         0.0460994        0.00149876    
      1.54000           2.40000         0.0444574        0.00171445    
      2.40000           4.80000         0.0302700        0.00231302    
      4.80000           10.0000         0.0396313        0.00313364