# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0622681        0.00753209    
     0.460000          0.700000         0.0582541        0.00779033    
     0.700000           1.00000         0.0571388         0.0105988    
      1.00000           1.54000         0.0953527        0.00880377    
      1.54000           2.40000         0.0783718         0.0134762    
      2.40000           4.80000         0.0998524         0.0167972    
      4.80000           10.0000          0.124779         0.0245357