2015AJ....149..111L

The star 1SWASP J022727.03+115641.7 was reported as a contact binary with a period shorter than the empirical limit of such systems. Our study shows the star not to be variable. Instead, it is the nearby star, 2MASS 02272637+1156494, that exhibits variability. The BRI CCD light curves of 2MASS 02272637+1156494 show the system to be a moderate mass ratio (2.154_–0.074^+0.008), and shallow contact (10.4_–1.9^+1.4%) W-type contact binary. The masses, radii, and luminosities of the binary components are, respectively, M₁ = 0.25_–0.01^+0.05M_☉, M₂ = 0.54_–0.04^+0.11M_☉, R₁ = 0.45_–0.01^+0.02R_☉, R₂ = 0.63_–0.02^+0.04_☉, L₁ = 0.038_–0.005^+0.018L_☉, and L₂ = 0.071_–0.010^+0.037L_☉, with an estimated distance 326_–46⁺¹²⁷ pc. These uncertainties mainly come from the errors of the colors used to estimate the temperature of the primary star. A dark spot was introduced on the massive component in the final solution.