A. Ecuvillon (1), G. Israelian (1), N. C. Santos (2,3), M. Mayor (3), V. Villar (4), G. Bihain (1) ((1)Instituto de Astrofisica de Canarias, Spain, (2) Observatorio Astronomico de Lisboa, Portugal, (3) Observatoire de Geneve, Switzerland, (4) Universidad Complutense de Madrid, Spain)
