# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0830779        0.00178356    
     0.460000          0.700000         0.0888942        0.00174860    
     0.700000           1.00000         0.0931597        0.00204239    
      1.00000           1.54000          0.102180        0.00261537    
      1.54000           2.40000          0.117185        0.00361551    
      2.40000           4.80000          0.122684        0.00499332    
      4.80000           10.0000          0.143197        0.00814577