1. Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile
2. Facultad de Ingeniería, Núcleo de Astroquímica & Astrofísica, Universidad Autónoma de Chile,Av. Pedro de Valdivia 425, Providencia, Santiago, Chile
3. Departamento de Ingeniería Informática, Universidad de Santiago de Chile, Av. Ecuador, 3659, Santiago, Chile
4. Department of Physics and Astronomy, School of Natural Sciences, Jodrell Bank Centre for Astrophysics, Alan Turing Building, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
5. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
6. Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Canary Islands, Spain
7. Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Tenerife, Spain
8. Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St George Street, Toronto, ON, M5S 3H8, Canada
9. Sub-department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
10. Cahill Centre for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
11. Max-Planck-Institut für Radioastronomie, Postfach 2024, D-53010 Bonn, Germany