Institution: | 1. Department of Physics, Hojai College, Hojai, India;2. Department of Physics, Tezpur University, Tezpur 784 028, India;3. Tata Institute of Fundamental Research, Homi Bhabha Road, Coalaba, Mumbai 400 005, India;4. Indian Institute of Astrophysics, Koramangala, Bangalore 560 034, India |