# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0530430        0.00577083    
     0.460000          0.700000         0.0595547        0.00519954    
     0.700000           1.00000         0.0576682        0.00730836    
      1.00000           1.54000         0.0765930        0.00714148    
      1.54000           2.40000         0.0835022        0.00966776    
      2.40000           4.80000         0.0832795         0.0143897    
      4.80000           10.0000         0.0863255         0.0322824