# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.304697        0.00483144    
     0.460000          0.700000          0.308672        0.00506885    
     0.700000           1.00000          0.351308        0.00607394    
      1.00000           1.54000          0.323884        0.00737321    
      1.54000           2.40000          0.287417        0.00701799    
      2.40000           4.80000          0.218816        0.00768425    
      4.80000           10.0000          0.171929         0.0108050