| Institution: | 1. Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt;2. Department of Astronomy and Meteorology, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt;3. Kottamia Center of Scientific Excellency of Astronomy and Space Sciences, (KCScE), Egypt\n;1. Early Universe Cosmology and Strings Group, Center for Astrophysics, Space Physics, and Engineering Research, Baylor University, One Bear Place, Waco, TX 76706, US;2. Department of Physics, Baylor University, One Bear Place, Waco, TX 76706, US;1. Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;2. Physics and Space Science College, China West Normal University, Nanchong 637002, China;1. Department of Physics, Shumen University, 9700 Shumen, Bulgaria;2. IRIDA Observatory, 67 Cherkovna Str., Sofia, Bulgaria;3. Institute of Astronomy and NAO, Bulgarian Academy of Sciences, 72 Tsarigradsko shossee blvd., 1784 Sofia, Bulgaria |
