# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0281692         0.0189108    
     0.460000          0.700000         0.0201550         0.0139643    
     0.700000           1.00000         0.0135541         0.0153151    
      1.00000           1.54000         0.0263487        0.00831241    
      1.54000           2.40000         0.0274131         0.0102973    
      2.40000           10.0000         0.0358947        0.00752135