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Szyma\\'nski, Patryk Iwanek, Pawe{\\l} Pietrukowicz, Przemek Mr\\'oz, Radek Poleski, Richard W. Pogge, Sang-Mok Cha, Seung-Lee Kim, Sun-Ju Chung, Szymon Koz{\\l}owski, Weicheng Zang, Yongseok Lee, Yoon-Hyun Ryu, Youn Kil Jung, Yun-Hak Kim","submitted_at":"2021-02-23T02:45:00Z","abstract_excerpt":"We present the analysis of the microlensing event OGLE-2018-BLG-1428, which has a short-duration ($\\sim 1$ day) caustic-crossing anomaly. The event was caused by a planetary lens system with planet/host mass ratio $q=1.7\\times10^{-3}$. Thanks to the detection of the caustic-crossing anomaly, the finite source effect was well measured, but the microlens parallax was not constrained due to the relatively short timescale ($t_{\\rm E}=24$ days). 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