Upakul Mahanta (1,2), Drisya Karinkuzhi (3), Aruna Goswami (3), Kalpana Duorah (2) ((1). Department of Physics, Bajali College, Pathsala, Assam, 781325, India, (2). Department of Physics, Gauhati University, Guwahati 781014, Assam, India, (3). Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India)
