# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0429860         0.0108400    
     0.460000          0.700000         0.0708813        0.00765205    
     0.700000           1.00000         0.0518426        0.00690689    
      1.00000           1.54000          0.160767        0.00540968    
      1.54000           2.40000          0.231554        0.00485334    
      2.40000           4.80000          0.196058        0.00307432    
      4.80000           10.0000          0.164702        0.00337622