# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.147001        0.00449076    
     0.460000          0.700000          0.149059        0.00414959    
     0.700000           1.00000          0.124337        0.00447261    
      1.00000           1.54000          0.106439        0.00412349    
      1.54000           2.40000          0.104473        0.00535390    
      2.40000           4.80000          0.102066        0.00749552    
      4.80000           10.0000          0.100548         0.0121046