Abstract
New BVRI light curves of the W UMa type eclipsing binary of multiple system 1SWASP J093010.78+533859.5 (GSC 0380-00759) have been constructed based on CCD observations obtained using 1.88 m reflector telescope of KAO, (Kottamia Astronomical Observatory), Egypt on March, 20th in 2013. New times of minima and new ephemeris have been determined from these light curves. Using the Binary Maker 3.0 (BM3) and PHOEBE program, the geometric and photometric element parameters of this system have been derived. Light curve analysis results indicate that J093010B is an overcontact binary with third body shared with 0.056 ± 0.006 of its total luminosity. The filling factor of the system is approximately equal to 17%. According to all available eclipse timings, the preliminary rate of period change has been determined to be -6.35 x 10-5 day/yr. The semi-major axis has been determined as 1.6 ± 0.1 R ⊙.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
