# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0198148        0.00208447    
     0.460000          0.700000        0.00595306        0.00211568    
     0.700000           1.00000         0.0101333        0.00228777    
      1.00000           1.54000        0.00287779        0.00285623    
      1.54000           2.40000        0.00859768        0.00314972    
      2.40000           4.80000         0.0199708        0.00374442    
      4.80000           10.0000         0.0111643        0.00677336