1. Observatório Nacional, Rua Gal. José Cristino 77, 20921-400, Rio de Janeiro, Brazil
2. Instituto de Astrofísica de Canarias (IAC), C/Vía Láctea s/n, E-38205, La Laguna, Spain
3. Departamento de Astrofísica, Universidad de La Laguna, E-38206, La Laguna, Spain
4. Astronomical Institute of the Romanian Academy, 5 Cuţitul de Argint, 040557 Bucharest, Romania
5. Fundación Galileo Galilei - INAF, Rambla José Ana Fernández Pérez 7, E-38712 Breña Baja, Tenerife, Spain
6. Florida Space Institute, 12354 Research Parkway Partnership 1 Building, Suite 214 Orlando, FL 32826-0650, USA