# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0398831        0.00544954    
     0.460000          0.700000         0.0914769        0.00444814    
     0.700000           1.00000         0.0210252        0.00604274    
      1.00000           1.54000         0.0668868        0.00456151    
      1.54000           2.40000         0.0540093        0.00343958    
      2.40000           4.80000         0.0945761        0.00388749    
      4.80000           10.0000         0.0401014        0.00439107