SIMBAD references

begin{HTML}Photoelectric light curves of BH Vir in the <I>UBVRI</I> bands observed by Arevalo et al. in 1986 were analyzed by using the latest version of the Wilson-Devinney program and to investigate the photometric parameters and spot activity. Satisfactory fits were obtained by assuming a hot spot only on the secondary star. The results show that the temperature of the spotted region relative to the photosphere, T_s/ T_ph, is 1.13 ± 0.027. The active region tends to occur at low latitude (near 81°). The results also show that the mass ratio obtained from the photoelectric light curves is q = m₂/ m₁ = 0.971. It is close to the spectroscopic value of 0.968 obtained by Zhai et al. (1990). The photosphere temperature of the primary is T₁ = 5969 ± 11 K. After checking of the activity pattern from 1953 to 1991, the activity cycle is estimated to be about 10 yr.