Affiliation: | 1.Department of Physics, Ultra College of Engineering and Technology for Women, Ultra, Nagar, India ;2.Department of Physics, Sethu Institute of Technology, Pulloor, Kariapatti, Viruthunagar, India ;3.Department of Physics, Arul Anandar College, Karumathur, Tamil Nadu, India ;4.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Jiangsu, China ;5.Astronomical Observatory of Jagiellonian University, Cracow, Poland ; |