# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.199993        0.00481004    
     0.460000          0.700000          0.210520        0.00471753    
     0.700000           1.00000          0.223614        0.00585445    
      1.00000           1.54000          0.366160         0.0109531    
      1.54000           2.40000          0.383766         0.0181033    
      2.40000           4.80000          0.331513         0.0288622    
      4.80000           10.0000          0.373177         0.0760008