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Zang, W. Zhu, Y.-H. Ryu, Y. K. Jung, Y. Lee, Y. Shvartzvald","submitted_at":"2018-06-21T23:26:57Z","abstract_excerpt":"We present the analysis of the binary-lens microlensing event OGLE-2017-BLG-0537. The light curve of the event exhibits two strong caustic-crossing spikes among which the second caustic crossing was resolved by high-cadence surveys. It is found that the lens components with a mass ratio $\\sim 0.5$ are separated in projection by $\\sim 1.3\\thetae$, where $\\thetae$ is the angular Einstein radius. Analysis of the caustic-crossing part yields $\\thetae=1.77\\pm 0.16$~mas and a lens-source relative proper motion of $\\mu =12.4\\pm 1.1~{\\rm mas}~{\\rm yr}^{-1}$. 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Gould, A. Udalski, B.-G. Park, C. Han, C.-U. Lee, D.-J. Kim, D.-J. Lee, H.-W. Kim, I.-G. Shin, I. Soszy\\'nski, J. C. Yee, J. Skowron, K.-H. Hwang, K. Ulaczyk, M. D. Albrow, M. K. Szyma\\'nski, M. Pawlak, P. Mr\\'oz, P. Pietrukowicz, R. Poleski, R. W. Pogge, S.-J. Chung, S. Koz{\\l}owski, S.-L. Kim, S.-M. Cha, W.-T. Kim, W. Zang, W. Zhu, Y.-H. Ryu, Y. K. Jung, Y. Lee, Y. Shvartzvald","submitted_at":"2018-06-21T23:26:57Z","abstract_excerpt":"We present the analysis of the binary-lens microlensing event OGLE-2017-BLG-0537. The light curve of the event exhibits two strong caustic-crossing spikes among which the second caustic crossing was resolved by high-cadence surveys. It is found that the lens components with a mass ratio $\\sim 0.5$ are separated in projection by $\\sim 1.3\\thetae$, where $\\thetae$ is the angular Einstein radius. 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