# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0218861         0.0112269    
     0.460000          0.700000         0.0277301        0.00928999    
     0.700000           1.00000         0.0495091         0.0109684    
      1.00000           1.54000         0.0645300        0.00667258    
      1.54000           2.40000         0.0636828        0.00496824    
      2.40000           4.80000         0.0688928        0.00437345    
      4.80000           10.0000         0.0587074        0.00492999