Discovery of two M 32 twins in Abell 1689 S. Mieske, L. Infante, M. Hilker, G. Hertling, J. P. Blakeslee, N. Benítez, H. Ford and K. Zekser A&A, 430 2 (2005) L25-L28 Published online: 20 January 2005 DOI: 10.1051/0004-6361:200400119