Affiliation: | Observatório do Valongo, Universidade Federal do Rio de Janeiro, Lad. Pedro Antônio 43, RJ, 20080-090, Brazil;PETROBRAS, REDUC/OT, Rod. Washington Luiz km 113,7, Duque de Caxias, RJ, 25225-010, Brazil;Department of Astronomy &Space Physics, Uppsala Astronomical Observatory, Box 515, 751 20, Sweden |