# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0333558        0.00584059    
     0.460000          0.700000         0.0419101        0.00534986    
     0.700000           1.00000         0.0748581        0.00660587    
      1.00000           1.54000         0.0645233        0.00630556    
      1.54000           2.40000         0.0746228        0.00873031    
      2.40000           4.80000          0.111371         0.0115731    
      4.80000           10.0000          0.113311         0.0197179