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V1135 Herculis: a double-lined eclipsing binary with an Anomalous Cepheid
E. Sipahi, C. Ibanoglu, O. Cakirli +2
BVR light curves and radial velocities for the double-lined eclipsing binary V1135\,Her were obtained. The brighter component of V1135\,Her is a Cepheid variable with a pulsation p…
Brightness variations in totally-eclipsing binary GSC4589-2999
E. Sipahi, H. A. Dal, O. Özdarcan
We present multi-colour CCD photometry of GSC4589-2999 obtained in 2008 and 2009. The observations indicate that the system is an active Algol binary. Based on the new data, the me…
An Eccentric Eclipsing Binary: CGAur
Esin Sipahi, Hasan Ali Dal
In this study, we present CG Aur's photometric observations obtained in the observing seasons 2011 and 2012, the first available multi-colour light curves. Their shape indicates th…
BD+36 3317: An algol type eclipsing binary in Delta Lyrae cluster
O. Özdarcan, E. Sipahi, H. A. Dal
In this paper, we present standard Johnson UBV photometry of the eclipsing binary BD+36 3317 which is known as a member of Delta Lyrae (Stephenson 1) cluster. We determined colors…