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Albrow, M. Donachie, M. K. Szyma\\'nski, M. Nagakane, M. Pawlak, N. Koshimoto, N. Rattenbury, P. Evans, P. J. Tristram, P. Mr\\'oz, P. Pietrukowicz, R. Barry, R. Poleski, R. W. Pogge, S.-J. Chung, S. Koz{\\l}owski, S.-L. Kim, S.-M. Cha, S. Miyazaki, T. Saito, T. Sumi, T. Yamada, V. Bozza, Y. Hirao, Y.-H. Ryu, Y. Itow, Y. K. Jung, Y. Lee, Y. Matsubara, Y. Muraki, Y. Shvartzvald","submitted_at":"2018-09-28T02:43:14Z","abstract_excerpt":"We present the analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with an event time scale $t_{\\rm E}\\sim 130$ days, the microlens parallax is precisely measured despite its small value of $\\pie\\sim 0.06$. The analysis of the well-resolved caustic crossings during both the source star's entrance and exit of the caustic yields the angular Einstein radius $\\thetae\\sim 0.6$~mas. 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Bhattacharya, A. Fukui, A. Gould, A. Sharan, A. Udalski, A. Yonehara, B.-G. Park, C. Han, C. H. Ling, C. Ranc, C.-U. Lee, D.-J. Kim, D.-J. Lee, D. J. Sullivan, D. Kim, D. P. Bennett, D. Suzuki, F. Abe, H. Munakata, H.-W. Kim, I. Bond, I.-G. Shin, I. Soszy\\'nski, J. C. Yee, J. Skowron, K.-H. Hwang, K. Kawasaki, K. Ohnishi, K. Ulaczyk, M. C. A. Li, M. D. Albrow, M. Donachie, M. K. Szyma\\'nski, M. Nagakane, M. Pawlak, N. Koshimoto, N. Rattenbury, P. Evans, P. J. Tristram, P. Mr\\'oz, P. Pietrukowicz, R. Barry, R. Poleski, R. W. Pogge, S.-J. Chung, S. Koz{\\l}owski, S.-L. Kim, S.-M. Cha, S. Miyazaki, T. Saito, T. Sumi, T. Yamada, V. Bozza, Y. Hirao, Y.-H. Ryu, Y. Itow, Y. K. Jung, Y. Lee, Y. Matsubara, Y. Muraki, Y. Shvartzvald","submitted_at":"2018-09-28T02:43:14Z","abstract_excerpt":"We present the analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. 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