Orbital solution for the MACHO*05:34:41.3–69:31:39 O3 If* +O6:V eclipsing binary system in the Large Magellanic Cloud

ABSTRA C T An orbital solution for the MACHO*05:34:41.3‐69:31:39 eclipsing binary system is presented, based on the published light curve and spectral data obtained with the 2.15-m telescope at CASLEO. Based on these spectroscopic observations, the binary components of this system were classified as O3 If* and O6:V respectively. The radial velocity data along with the published light curve were analysed with the Wilson‐Devinney code to derive the following masses and radii for the components of this system: M1a 41 ^ 1: 2M (; R1a 9:6 ^ 0:02 R(; M2a 27 ^ 1: 2M ( and R2a 8:0 ^ 0:05 R(: The solution shows that the system is in overcontact, as one would expect from the derived masses and the very short orbital period (,1.4 d).