Poorly Studied Eclipsing Binaries in the Field of DO Dra: V0455 Dra and V0454 Dra

TL;DR

This study analyzes two poorly understood eclipsing binary systems, V0455 Dra and V0454 Dra, correcting their periods, characterizing their light curves, and modeling their overcontact binary nature using new algorithms and software.

Contribution

The paper introduces new software and algorithms for analyzing eclipsing binaries, providing corrected periods, detailed light curve characterization, and modeling of overcontact systems.

Findings

Both systems are overcontact binaries of EW type.

Dark spots are present on both systems.

Significant corrections to periods and epochs were made.

Abstract

We report an analysis of two poorly studied systems GSC 04396-00605 and GSC 04395-00485, which were recently named as V0455 Dra and V0454 Dra, respectively. For two eclipsing stars, the periods and epochs were significantly corrected using our extensive data. The phenomenological characteristics of the mean light curves were determined using the "New Algol Variable" (NAV) algorithm. The individual times of Maxima/Minima (ToM) were determined using the newly developed software MAVKA, which outputs the accurate parameters using the "asymptotic parabola" approximations. The light curves were approximated using the Wilson-Devinney model, the best fit parameters are listed. For both systems, the presence of the dark spot is justified, the parameters are estimated. Both systems classified to be overcontact binaries of EW type. The observations were obtained using the 1-m Korean telescope of the LOAO while monitoring the cataclysmic variable DO Dra within the "Inter-Longitude Astronomy" (ILA) project.