1. Departamento de Física, Universidade Federal de Santa Catarina, 88.040-908 Florianópolis, Brazil
2. Departamento de Ciencias Físicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. Fernandez Concha 700, 7550196, Las Condes, Santiago, Chile
3. Millennium Institute of Astrophysics, Av. Vicuna Mackenna 4860, 782-0436 Santiago, Chile
4. Vatican Observatory, I-00120 Vatican City State, Italy
5. Dipartimento di Fisica, Università degli Studi di Roma ‘La Sapienza’, P.le Aldo Moro, 2, I-00185 Rome, Italy
6. Instituto de Astrofisica, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, 8970117, Macul, Santiago, Chile
7. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
8. Centre for Astrophysics Research, School of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK