Refined System Ephemeris for Five Contact Binaries: GW Psc, NS Com, NW Aqr, V0492 Lac, V1355 Tau

JOURNAL OF OCCULTATION AND ECLIPSE (JOE); ISSN 2522-7955; No. 8, 2021

Atila Poro¹, Elnaz Bozorgzadeh², Negar Sadat Mahdavi³, Ahmad Sarostad⁴, Sobhan Sarmad², Elnaz Abdolrahimi Niari², Masoud Rahimpour Vayani²

¹The International Occultation Timing Association Middle East section, info@iota-me.com
²Ayaz Astronomical Society, Tabriz, Iran, ayazastro@gmail.com
³BiKaran Observatory, Kerman, Iran
⁴Desert Night Sky Astronomical Society of Yazd, Yazd, Iran

Abstract
We study five W UMa contact binary systems. These binary systems have short periods. We have selected them on the basis that they are less studied. Accordingly, we collected all their times of minima. These times of minima were chosen based on CCD observation and a valid timing method. So we present a new ephemeris for each of them.

Keyword: Star, Contact Binary, W UMa-type, Ephemeris