# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.222511        0.00528535    
     0.460000          0.700000          0.229469        0.00513787    
     0.700000           1.00000          0.240160        0.00588023    
      1.00000           1.54000          0.270690        0.00804761    
      1.54000           2.40000          0.265069         0.0130535    
      2.40000           4.80000          0.266319         0.0210221    
      4.80000           10.0000          0.213211         0.0520198