1. Aryabhatta Research Institute of Observational Sciences , Manora Peak, Nainital 263001, Uttarakhand, India
2. Graduate Institute of Astronomy, National Central University , 300 Zhongda Road, Zhongli 32001 Taoyuan, Taiwan
3. Department of Physics, National Central University , 300 Zhongda Road, Zhongli 32001 Taoyuan, Taiwan
4. Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences , Tashkent, Republic of Uzbekistan
5. S. N. Bose National Centre for Basic Sciences , Kolkata 700106, India
6. Indian Institute of Astrophysics , Koramangala, Bangalore-560034, India