Proper motions of the optically visible open clusters based on the UCAC4 catalog W. S. Dias, H. Monteiro, T. C. Caetano, J. R. D. Lépine, M. Assafin and A. F. Oliveira A&A, 564 (2014) A79 Published online: 10 April 2014 DOI: 10.1051/0004-6361/201323226