1. Department of Theoretical Sciences, S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Saltlake, Kolkata 700106, West Bengal, India
2. Inter-University Centre for Astronomy & Astrophysics (IUCAA), Pune 411007, India
3. Department of Physics, West Bengal State University, Barasat, Kolkata 700126, India
4. Department of Physics, Kandi Raj College, Kandi, Murshidabad 742137, India