1. Department of Physics, Cotton University , Guwahati 781001, Assam, India
2. Space and Astronomy Research Center, Cotton University , Guwahati 781001, Assam, India
3. Department of Physics, State University of New York , Oswego, NY 23126, USA
4. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences , Eötvös Loránd Research Network (ELKH), Konkoly-Thege Miklós út 15-17, H-1121 Budapest, Hungary
5. INAF–Osservatorio Astronomico di Capodimonte , Via Moiariello 16, I-801301 Napoli, Italy