1. Inter-University Centre for Astronomy and Astrophysics, Ganeshkhind, Post Bag 4, Pune 411007, India
2. Tata Institute of Fundamental Research, Mumbai 400005, India
3. Raman Research Institute, Bangalore 560080, India
4. Institut d’Astrophysique de Paris (UMR 7095: CNRS & UPMC – Sorbonne Universités), 98 bis bd Arago, F-75014 Paris, France
5. Department of Physics and Astronomy, The Johns Hopkins University Homewood Campus, Baltimore, MD 21218, USA
6. BIPAC, Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK