# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0657824        0.00880178    
     0.460000          0.700000         0.0785407        0.00673194    
     0.700000           1.00000         0.0740938         0.0114667    
      1.00000           1.54000         0.0796927        0.00986788    
      1.54000           2.40000         0.0626295         0.0158209    
      2.40000           4.80000         0.0686969         0.0207042    
      4.80000           10.0000         0.0775673         0.0417059