Doug Geisler (Universidad de Concepcion, Concepcion, Chile), Verne V. Smith (University of Texas El Paso, El Paso, Texas, USA), George Wallerstein (University of Washington, Seattle, Washington, USA), Guillermo Gonzalez (Iowa State University, Ames, Iowa, USA), Corinne Charbonnel (Geneva Observatory, Sauverny, Switzerland, and Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrenees, Toulouse, France)
