Affiliation: | (1) Instituto de Astrofísica de Canarias (IAC), C. Via Lactea s/n, 38200 La Laguna (Tenerife), Spain;(2) Max-Planck Institute für Aeronomie, Max-Planck-Str. 2, D-37191 Katlenburg-Lindau, Germany;(3) Observatorio Nacional, Rua General José Cristino 77, 20921 Rio de Janeiro, Brazil |