# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0960767        0.00326657    
     0.460000          0.700000         0.0911549        0.00391226    
     0.700000           1.00000         0.0973383        0.00482089    
      1.00000           1.54000         0.0973564        0.00643807    
      1.54000           2.40000         0.0767340         0.0114026    
      2.40000           4.80000         0.0794156         0.0251773    
      4.80000           10.0000         0.0736518         0.0680466