1. Department of Astronomy and Space Sciences, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey
2. Department of Physics, Faculty of Science, Istanbul University, 34134 Vezneciler, Istanbul, Turkey
3. Feza Gürsey Center for Physics and Mathematics, Boğaziçi University, 34684 Çengelköy, Istanbul, Turkey