[vsnet-chat 7698] VSX J052807.9+725606

[Ivan Andronov]

Photometric Study of the Unusual Binary System VSX J052807.9+725606

http://adsabs.harvard.edu/abs/2011arXiv1106.0845V

The results of three-color BVR photometric study of a recently discovered unusual binary system VSX J052807.9+725606 = USNO-B1.0 1629-0064825 are presented. This system is very similar to V361 Lyr, which was assumed to be unique. We confirmed a strong asymmetry of the phase curve and found the wavelength dependence of the amplitude. This is interpreted by a "direct impact" model with a "hot spot" in the atmosphere of the accreting component. Color temperatures are determined. Characteristics of the "hot spot" are estimated. We also calculated the new ephemeris for VSX J052807.9+725606:
Min.I. HJD = 2455550.0374  + 0.4116986 E ,
                  ±0.0005   ±0.0000024


Our previous studies of the object:
http://astro.sci.muni.cz/variables/oejv/issues/oejv0127.pdf
http://astro.sci.muni.cz/variables/oejv/issues/oejv0139.pdf (page 20)

Virnina, N. A.; Andronov, I. L.; Antoniuk, K. A.

(1) Department “High and Applied Mathematics”, Odessa National Maritime University, Odessa, Ukraine; e-mail: virnina at gmail.com, tt_ari at ukr.net  
(2) Crimean Astrophysical Observatory, Crimea, Ukraine; e-mail:  antoniuk at crao.crimea.ua