Probing the kinematics of early - type galaxy halos using planetary nebu - lae

1 Max-Plank-Institut für Extraterrestrische Physik, Giessenbachstraβe, D-85741 Garching bei München, Germany 2 European Southern Observatory, Karl-Schwarzschild-Straβe 2, D-85748 Garching bei München, Germany 3 INAF, Osservatorio Astronomico di Pino Torinese, I-10025 Pino Torinese, Italy 4 Kapteyn Astronomical Institute, Postbus 800, 9700 AV Groningen, The Netherlands 5 Leiden Observatory, Leiden University, PO Box 9513, 2300RA Leiden, The Netherlands 6 School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK 7 INAF-Observatory of Capodimonte, Salita Moiariello, 16, 80131, Naples, Italy 8 UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA 9 Dipartimento di Scienze Fisiche, Universitá Federico II, Via Cinthia, 80126, Naples, Italy 10 INAF VSTceN, Salita Moiariello, 16, 80131, Naples, Italy 11 Research School of Astronomy & Astrophysics, ANU, Canberra, Australia