{"paper":{"title":"One Planet or Two Planets? The Ultra-sensitive Extreme-magnification Microlensing Event KMT-2019-BLG-1953","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Akihiko Fukui, Andrew Gould, Aparna Bhattacharya, Atsunori Yonehara, Byeong-Gon Park, Cheongho Han, Chung-Uk Lee, Cl\\'ement Ranc, Daisuke Suzuki, David P. Bennett, Doeon Kim, Dong-Jin Kim, Dong-Joo Lee, Fumio Abe, Haruno Suematsu, Hikaru Shoji, Hirosane Fujii, Hyoun-Woo Kim, Ian A. Bond, In-Gu Shin, Iona Kondo, Jennifer C. Yee, Kyu-Ha Hwang, Man Cheung Alex Li, Martin Donachie, Masayuki Nagakane, Michael D. Albrow, Naoki Koshimoto, Nicholas J. Rattenbury, Paul J. Tristram, Richard Barry, Richard W. Pogge, Rintaro Kirikawa, Sang-Mok Cha, Seung-Lee Kim, Shota Miyazaki, Sun-Ju Chung, Takahiro Sumi, Tsubasa Yamawaki, Weicheng Zang, Woong-Tae Kim, Yasushi Muraki, Yongseok Lee, Yoon-Hyun Ryu, Yoshitaka Itow, Yossi Shvartzvald, Youn Kil Jung, Yuki Hirao, Yuki Satoh, Yutaka Matsubara, Yuzuru Tanaka","submitted_at":"2020-02-13T02:18:35Z","abstract_excerpt":"We present the analysis of a very high-magnification ($A\\sim 900$) microlensing event KMT-2019-BLG-1953. A single-lens single-source (1L1S) model appears to approximately delineate the observed light curve, but the residuals from the model exhibit small but obvious deviations in the peak region. A binary lens (2L1S) model with a mass ratio $q\\sim 2\\times 10^{-3}$ improves the fits by $\\Delta\\chi^2=181.8$, indicating that the lens possesses a planetary companion. From additional modeling by introducing an extra planetary lens component (3L1S model) and an extra source companion (2L2S model), it"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.05310","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.05310/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}