Photometric analysis of four W Ursae Majoris variables

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Neal, Alexander J.
Berrington, Robert C.
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This study presents a comprehensive photometric analysis of fourWUrsae Majoris eclips- ing binary stars from the Northern Sky Variability Survey (NSVS): NSVS 3792718, NSVS 2854398, NSVS 4633952, and NSVS 5214334. All observations were taken through the John- son B, Johnson V, and Cousins R bandpasses. The 20-inch telescope at Ball State University, the 1-meter Jacobus Kapteyn at the Roche de los Muchachos Observatory, and the 0.9-meter telescope at Kitt Peak National Observatory were used. The latter two were made available via the Southeastern Astronomical Research Association (SARA) consortium. The photo- metric analysis of these systems includes: times of minimum light analysis (observed minus calculated), orbital period determination using the PERANSO software, surface temperature, light curve classi cation, O'Connell e ect quantifying, and Wilson-Devinny modeling us- ing the PHOEBE software. Possible period/epoch shifts for these systems were speculated, if not observed. Radial velocity data is required to ascertain and/or constrain important parameters of these systems.