# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0142423        0.00749737    
     0.460000          0.700000        0.00882850        0.00816469    
     0.700000           1.00000         0.0120850        0.00627009    
      1.00000           1.54000         0.0179643        0.00534402    
      1.54000           2.40000         0.0110689         0.0101271    
      2.40000           4.80000         0.0141234         0.0107828    
      4.80000           10.0000         0.0285870         0.0104515