# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.170960        0.00520454    
     0.460000          0.700000          0.180785        0.00473114    
     0.700000           1.00000          0.206420        0.00566125    
      1.00000           1.54000          0.286498        0.00816038    
      1.54000           2.40000          0.294473         0.0129161    
      2.40000           4.80000          0.264452         0.0203023    
      4.80000           10.0000          0.261875         0.0470752