E.R.Carrasco (Gemini Observatory, Southern Operations Center, Chile),
  E.S.Cypriano (Univesity College London, UK), G.B.Lima Neto (IAG/USP, Brazil),
  H. Cuevas (Facultad de Ciencias, ULS, Chile), L. Sodre Jr. (IAG/USP, Brazil),
  C. Mendes de Oliveira (IAG/USP, Brazil) and A. Ramirez (Facultad de Ciencias,
  ULS, Chile)