Companion detection limit plots for WR 18. The first plot shows a randomly created dense grid about 200 mas in radius around the central primary star that was used to inject a second point source and calculate the flux ratio needed for a 3σ detection. The scale for flux ratio is given in magnitude with reference to the primary. The second plot shows a histogram of limiting magnitudes over all the grid points. Lastly, the third plot shows detection limit as a function of radial distance, along with a rolling average in red.