Sukanta Deb1, Harinder P. Singh1, T.R. Seshadri1 and
Ranjan Gupta2
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 δ
Scuti database of All Sky Automated Survey (ASAS) (Pojmanski 2002). Our
analysis reveals that the star is not a δ 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 photometry alone, as the observed light curve can be
fitted for both A- and W-type solutions. The exact classification of this binary
needs to be determined from high resolution spectroscopy.
Keywords: binaries: close - stars: individual ASAS 134738+0410.1 - stars:
magnetic fields
1 Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India,
2Inter-University Centre for Astronomy and Astrophysics (IUCAA), Post Bag 4,
Ganeshkhind, Pune 411007, India