1. Department of Mathematics Barasat Government College North 24 Parganas Kolkata 700124 West Bengal India
2. Centre for Cosmology Astrophysics and Space Science (CCASS) GLA University Mathura 281406 Uttar Pradesh India
3. Virtual Institute of Astroparticle physics Paris 75018 France
4. Center for Cosmoparticle Physics Cosmion National Research Nuclear University “MEPHI” Moscow 115409 Russia
5. Institute of Physics Southern Federal University Stachki 194 Rostov on Don 344090 Russia
6. Department of Physics Government College of Engineering and Ceramic Technology Kolkata 700010 West Bengal India