# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.159064        0.00293372    
     0.460000          0.700000          0.155577        0.00244813    
     0.700000           1.00000          0.142217        0.00265247    
      1.00000           1.54000          0.123960        0.00195538    
      1.54000           2.40000          0.103378        0.00223404    
      2.40000           4.80000         0.0845327        0.00250728    
      4.80000           10.0000         0.0738008        0.00314641