# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.114053        0.00131674    
     0.460000          0.700000          0.123651        0.00133081    
     0.700000           1.00000          0.133483        0.00164505    
      1.00000           1.54000          0.149474        0.00198807    
      1.54000           2.40000          0.156113        0.00276659    
      2.40000           4.80000          0.154350        0.00428085    
      4.80000           10.0000          0.169997        0.00672020