1. Faculty of Exact and Natural Sciences, Institute of Physics, Sun, Earth and Planetary Physics Group, University of Antioquia, 05001000 Medellín, Antioquia, Colombia
2. Observatorio ‘Galileo Galilei’, X31 Oro Verde, Av. Sarmiento s/n, 1425 CABA, Argentina
3. Observatorio ‘Costa Teguise’, E-Z39 Lanzarote, Canary Islands, España