New Light Curve Analysis and Period Changes of the Over-contact Binary NX Boo

JOURNAL OF OCCULTATION AND ECLIPSE (JOE); ISSN 2522-7955; No. 2, 2015

F. Hosseini¹, H. Hekmatzadeh¹, S. Zandian¹

¹International Occultation Timing Association-Middle East Section (IOTA-ME), Iran; info@iota-me.com

Abstract

We present V, R and I light curves of the eclipsing binary system NX Boo (GSC 02565-00331) based on the CCD observation using Variable Star and Exoplanet Section of Czech Astronomical Society, B.R.N.O project data. Eleven new times of minima (8 primary and 3 secondary) have been derived from the presented photometry data, and an improved ephemeris has been determined. These new data were analyzed by using Binary Maker 3 program, which yielded the geometrical system parameters of both stars.

Keywords: Variable, Over-contact, NX Boo