A CCD photometric study of the newly discovered contact binary ASAS 134738+0410.1

TL;DR

This study uses CCD photometry to analyze the star ASAS 134738+0410.1, revealing it as a W UMa contact binary with a 0.2853-day period, but its exact subtype requires spectroscopic confirmation.

Contribution

First CCD photometric analysis of ASAS 134738+0410.1 identifying it as a W UMa contact binary and providing initial light curve modeling results.

Findings

Star is a W UMa type contact binary.

Orbital period is approximately 0.2853 days.

Photometry alone cannot determine the binary subtype.

Abstract

We present a CCD photometric study of the star with ASAS ID 134738 + 0410.1 using V band observations obtained from the $IUCAA$ Girawali Observatory (IGO) 2-metre telescope, India. The star was selected from the $\delta$ Scuti database of All Sky Automated Survey (ASAS) (Pojmanski 2002). Our analysis reveals that the star is not a $\delta$ Scuti variable but is in fact a W UMa type contact binary with an orbital period of 0.2853067 day. Two new times of primary and secondary minima were determined from the observed data. A preliminary solution obtained using the Wilson-Devinney light curve modelling technique indicates that the star is more likely a partially-eclipsing W UMa type contact binary. However, the determination of actual subtype of this binary is quite impossible from the photometry alone, as the observed light curve can fitted for both A- and W-type solutions. The exact classification of this binary needs to be determined from high resolution spectroscopy.