Modern Techniques in Galaxy Kinematics: CDI and the Planetary Nebula   Spectrograph
  We report here the successful commissioning of the PN.Spectrograph, the first special-purpose instrument for the measurement of galaxy kinematics through the PN population 
N.G. Douglas, K. Kuijken, A.J. Romanowsky, M.R. Merrifield, M.   Arnaboldi, K. Freeman, K. Taylor