1. Institute of Astrophysics, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
2. Núcleo de Astronomía de la Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
3. School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
4. International Centre for Radio Astronomy Research, The University of Western Australia, 35 Stirling Hw, 6009 Crawley, WA, Australia
5. European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile
6. European Southern Observatory, Karl-Schwarzchild-str., 2, D-85748 Garching b. Munchen, Germany
7. Instituto de Física y Astronomía, Universidad de Valparaíso, Gran Bretana 1111, Valparaíso, Chile
8. Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de Sáo Paulo (USP), R. do Matão 1226, 05508-090 São Paulo, Brazil
9. Observatorio de Valongo, Universidade Federal do Rio de Janeiro, Ladeira do Pedro Antonio, 43, Centro, Rio de Janeiro - RJ 20080-090, Brazil
10. Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre 91501-970, RS, Brazil
11. Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, E-28850 Madrid, Spain
12. Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea