Kinematics of the old stellar population at the Galactic centre S. Trippe, S. Gillessen, O. E. Gerhard, H. Bartko, T. K. Fritz, H. L. Maness, F. Eisenhauer, F. Martins, T. Ott, K. Dodds-Eden and R. Genzel A&A, 492 2 (2008) 419-439 Published online: 27 October 2008 DOI: 10.1051/0004-6361:200810191