Citation:
Skowron J, Udalski A, Gould A, Dong S, Monard L A G, Han C, Nelson C R, McCormick J, Moorhouse D, Thornley G, et al. Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions. \apj. 2011;738 (1) :87.