Microlensing towards M 31 with MDM data S. Calchi Novati, Ph. Jetzer, G. Scarpetta, Y. Giraud-Héraud, J. Kaplan, S. Paulin-Henriksson and A. Gould A&A, 405 3 (2003) 851-857 Published online: 30 June 2003 DOI: 10.1051/0004-6361:20030667