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Pogge, Rintaro Kirikawa, Samson Johnson, Sang-Mok Cha, Sean Carey, Sebastiano Calchi Novati, Seung-Lee Kim, Shota Miyazaki, Shude Mao, Stela Ishitani Silva, Sun-Ju Chung, Szymon Koz{\\l}owski, Takahiro Sumi, Tianshu Wang, Tsubasa Yamawaki, Weicheng Zang, Wei Zhu, Xiangyu Zhang, Yasushi Muraki, Yongseok Lee, Yoon-Hyun Ryu, Yoshitaka Itow, Yossi Shvartzvald, Youn Kil Jung, Yuki Hirao, Yuki Satoh, Yutaka Matsubara, Yuzuru Tanaka","submitted_at":"2021-03-22T14:16:21Z","abstract_excerpt":"In order to exhume the buried signatures of \"missing planetary caustics\" in the KMTNet data, we conducted a systematic anomaly search to the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search reveals the lowest mass-ratio planetary caustic to date in the microlensing event OGLE-2019-BLG-1053, for which the planetary signal had not been noticed before. 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