The asymptotics of stationary electro-vacuum metrics in odd space-time   dimensions
  We show that stationary, asymptotically flat solutions of the electro-vacuum Einstein equations are analytic at $i^0$, for a large family of gauges, in odd space-time dimensions higher than seven. The same is true in space-time dimension five for static vacuum solutions with non-vanishing mass. 
Robert Beig, Piotr T. Chru\'sciel