A study of a contact binary system NSVS 2983201

TL;DR

This paper presents the first light curve analysis of the short-period contact binary NSVS 2983201, revealing a shallow contact configuration, a large starspot, and providing initial physical parameters for future monitoring.

Contribution

It offers the first detailed light curve modeling and physical parameter estimation of NSVS 2983201, highlighting the presence of a starspot and shallow contact configuration.

Findings

Shallow (10%) contact binary with mass ratio q=0.36

Presence of a large circumpolar starspot causing the O'Connell effect

Physical parameters estimated with consistent but non-overlapping methods

Abstract

Here we present the observations and the first light curve analysis of the short-period variable star NSVS 2983201. Using the light curve numerical modeling we find the best fitting model to be of shallow (ff=10%) contact binary configuration of mass ratio q=0.36. The light curve of the system experiences the O'Connell effect, which led to identifying a large circumpolar starspot. With a careful multi-cases analysis we search for the physical parameters of the system. We find the results obtained with the different methods to be close, but not overlapping. This system will be scheduled for the further monitoring.