# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.143740        0.00872798    
     0.460000          0.700000          0.146197        0.00955306    
     0.700000           1.00000          0.151878         0.0130240    
      1.00000           1.54000          0.167567         0.0196116    
      1.54000           2.40000          0.165074         0.0207253    
      2.40000           10.0000          0.170486         0.0234809