Michael Andrew Dopita Australian National University Piero Benvenuti INAF - Osservatorio Astronomico di Roma Sandro D'Odorico European Southern Observatory - Germany John I. Danziger INAF - Osservatorio Astronomico di Trieste Donald Mathewson Australian National University Francesca Matteucci INAF - Osservatorio Astronomico di Trieste Ian Tuohy British Aerospace Australia