1. Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81, Manauli 140306, Punjab, India
2. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
3. Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada
4. University of Crete, Department of Physics, GR-71003 Heraklion, Greece
5. Foundation for Research and Technology – Hellas (FORTH), Heraklion 71003, Greece
6. Inter-University Centre for Astronomy, Astrophysics, Ganeshkhind, Pune 411 007, India