1. South African Astronomical Observatory (SAAO), South Africa
2. Brazilian Center for Physics Research (CBPF), Brazil
3. Institute of Astronomy of the Russian Academy of Sciences (INASAN) 119017, Russia
4. Space Research Institute of the Russian Academy of Sciences (IKI), Russia
5. Aryabhatta Research Institute of Observational Sciences (ARIES), India
6. Indian Institute of Astrophysics (IIA), India
7. National Astronomical Observatories, China
8. College of Astronomy and Space Sciences, China; Sydney Institute for Astronomy, Australia