# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.160204        0.00356546    
     0.460000          0.700000          0.181440        0.00373564    
     0.700000           1.00000          0.238435        0.00457060    
      1.00000           1.54000          0.264226        0.00453050    
      1.54000           2.40000          0.257048        0.00515766    
      2.40000           4.80000          0.232410        0.00696190    
      4.80000           10.0000          0.197802         0.0104967