1. Departamento de Física, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria , 97105-900, Santa Maria, RS, Brazil
2. Instituto de Física, Universidade Federal do Rio Grande do Sul , Av. Bento Gonçalves 9500, 91501-970 Porto Alegre, RS, Brazil
3. Department of Physics & Astronomy, Johns Hopkins University, Bloomberg Center , 3400 N. Charles St, Baltimore, MD 21218, USA
4. Institute for Advanced Study , Einstein Dr, Princeton, NJ 08540, USA
5. Departamento de Física, Universidade Federal de Santa Catarina , P.O. Box 476, 88040-900, Florianópolis, SC, Brazil
6. Department of Physics and Astronomy, Georgia State University , 25 Park Place, Suite 605, Atlanta, GA 30303, USA
7. Leiden Observatory , PO Box 9513, NL-2300 RA, Leiden, The Netherlands
8. Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, China
9. Instituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain
10. Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, Spain
11. Max-Planck-Institut für Extraterrestrische Physik , Postfach 1312, D-85741, Garching, Germany
12. AURA for ESA, Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
13. School of Mathematics, Statistics and Physics, Newcastle University , NE1 7RU, UK
14. European Southern Observatory , Karl-Schwarzschild-Strasse 2, Garching bei München, D-85748, Germany
15. Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
16. Laboratório Nacional de Astrofísica, Rua dos Estados Unidos , 154, 37504-364 Itajubá, MG, Brazil
17. Instituto Nacional de Pesquisas Espaciais , Av. dos Astronautas, 1758 - Jardim da Granja São José dos Campos/SP - 12227-010, Brazil
18. Instituto Federal de Educação, Ciência e Tecnologia Farroupilha , BR287, km 360, Estrada do Chapadão, 97760-000, Jaguari - RS, Brazil