# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0550572        0.00233853    
     0.460000          0.700000         0.0492408        0.00223589    
     0.700000           1.00000         0.0418015        0.00252243    
      1.00000           1.54000         0.0427740        0.00255295    
      1.54000           2.40000         0.0399451        0.00288871    
      2.40000           4.80000         0.0435696        0.00318652    
      4.80000           10.0000         0.0279746        0.00600696