COMMISSIONS G1 AND G4 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Volume 63 Number 6209 DOI: 10.22444/IBVS.6209 Konkoly Observatory Budapest 23 May 2017 HU ISSN 0374 – 0676 TIMES OF MINIMA OF SOME ECLIPSING BINARIES BAHAR, E. 1,2 ; Y ¨ OR ¨ UKO ˘ GLU, O. 1,2 ; ESMER, E.M. 1,2 ; KILIC¸O ˘ GLU, T. 1,2 ; ¨ OZT ¨ URK, D. 1,2 ; DO ˘ GRUEL, M.B. 1,2 ; ¨ OZUYAR, D. 1,2 ;G ¨ UM ¨ US¸, D. 1,2 ; ˙ IZC ˙ I, D.D. 1,2 ; KETEN, B. 1,2 ; TEZCAN, C.T. 1,2 ; S¸ENAVCI, H.V. 1,2 ; YILMAZ, M. 1,2 ; BAS¸T ¨ URK, ¨ O. 1,2 ; SELAM, S.O. 1,2 ; EKMEKC¸ ˙ I, F. 1,2 ; ALBAYRAK, B. 1,2 ;C¸ ALIS¸KAN, S¸. 1,2 ; AKC¸ AR, A.E. 1,2 1 Ankara University, Faculty of Science, Department of Astronomy and Space Sciences, TR-06100, Tando˘ gan, Ankara, Turkey; e-mail: enbahar@ankara.edu.tr 2 Ankara University Kreiken Observatory, TR-06873, Ahlatlıbel, Ankara, Turkey Observatory and telescope: 14” Schmidt-Cassegrain telescope of the Ankara University Kreiken Observatory Detector: Apogee ALTA U47+ CCD camera. 1024 x 1024 pixels. Method of data reduction: Reduction of the CCD frames and differential photometry were performed with the standard tasks of IRAF 1 package Method of minimum determination: The minima times of eclipsing binaries were calculated using Kwee & van Woerden’s (1956) method. † Based on the observations performed at Ankara University Kreiken Observatory 1 IRAF is distributed by the National Optical Astronomical Observatories, operated by the Association of the Universities for Research in Astronomy, inc., under cooperative agreement with the National Science Foundation