A search for planets in the old open cluster NGC 6791 H. Bruntt, F. Grundahl, B. Tingley, S. Frandsen, P. B. Stetson and B. Thomsen A&A, 410 1 (2003) 323-335 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20031198