Based on O− C curves, we present detailed period investigations of two weak-contact
binaries CC Com and BV Dra. It is found that the periods of these two binaries have varied in …

We present a detailed period analysis of TY Bootis, based on all available light minimum
times covering about 80 years. We discovered that there exists a cyclic variation overlaying …

This paper presents the results of a combined spectroscopic and photometric study of 20
contact binary systems: HV Aqr, OO Aql, FI Boo, TX Cnc, OT Cnc, EE Cet, RW Com, KR …

We present new photometry for three short-period contact binaries, GN Boo, BL Leo, and
V1918 Cyg, observed from 2008 December to 2012 April using several small telescopes in …

Abstract Multi-color (B, V, R c, I c) CCD photometric light curves of the contact binary V502
Oph are analyzed using the Wilson–Devinney program. The solutions reveal that V502 Oph …

From new CCD observations, 11 light minimum times are presented in this paper. The
orbital period change of a W UMa-type eclipsing binary, BM Urase Majoris, was …

New CCD photometry for the eclipsing binary EH Cnc was made from 2009 to 2011, and five
new eclipsing times are presented. Through using the updated Wilson-Devinney code, we …

We present multicolor charge-coupled device (CCD) photometry for the eclipsing binary BS
Cassiopeiae, observed on four nights between 2007 December and 2008 January. Using …

A study of the orbital period variation of the W UMa system CK Bootis is made using an
extended observational time base. The biperiodicity of the orbital period modulation is …

The list of 240 eclipsing variables with the light equation (LITE effect) has been compiled.
Some characteristics of multiple systems have been determined assuming that those stars …