Various Wilson–Devinney fits to the J-band light curveof S106IR. Top panel: the solid line indicates the best fit model with the parameters given in Table 1. The dashed line indicates the same as the best-fit model but with an inclination i = 30°, closer to a pole-on view of the orbit. The dotted line is same as the best-fit model but with an inclination i = 90°, corresponding to an edge-on view of the orbit in which the two components periodically eclipse each other. Thedot-dashed line indicates the same as the best-fit model with an argument of the periastron of 90°. Bottom panel: the solid line indicates the best-fit model. The dashed line is the same as the best-fit model but with a secondary of M_bol = −1. The dotted line indicates the best-fit model with eccentricity e = 0.1. the dot-dashed line indicates the same as best-fit model but with a secondary with T_eff = 20 000 K.