RACE-OC project: rotation and variability in the open cluster NGC 2099 (M 37) S. Messina, E. Distefano, P. Parihar, Y. B. Kang, S.-L. Kim, S.-C. Rey and C.-U. Lee A&A, 483 1 (2008) 253-262 Published online: 19 March 2008 DOI: 10.1051/0004-6361:20079216