# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0439705        0.00761627    
     0.460000          0.700000         0.0540257        0.00660643    
     0.700000           1.00000         0.0421287         0.0108662    
      1.00000           1.54000         0.0581224        0.00904598    
      1.54000           2.40000         0.0729310         0.0116483    
      2.40000           4.80000         0.0724532         0.0157349    
      4.80000           10.0000         0.0180391         0.0469824