SIMBAD references

This paper presents complete uvby light curves for the recently discovered eclipsing binary system V2154 Cyg. Additional Crawford H_β data were also obtained. Three times of primary minima and two secondary minima are determined. An improved orbital period is found to be 2.6306312d. A detailed photometric analysis is made using the EBOP code. This eclipsing binary is probably one of the components of a much wider double star, forming altogether a triple system. The results show that the eclipsing pair is a detached system with two late-type stars very different in size. Masses of about M₁=1.4M_☉ and M₂=0.8M_☉ are inferred for the components by using stellar evolution models. The total mass of the probable triple system is estimated to be of about 3.5M_☉, leading to a minimum orbital period of about 140yr for the visual pair.