Publications of the Astronomical Society of Australia Publications of the Astronomical Society of Australia, Cambridge University Press (CUP), 2018, 35, ⟨10.1017/pasa.2018.15⟩ Publications of the Astronomical Society of Australia, 35:e030. Cambridge University Press Publications of the Astronomical Society of Australia, 2018, 35, ⟨10.1017/pasa.2018.15⟩