{"paper":{"title":"OGLE-2017-BLG-0173Lb: Low Mass-Ratio Planet in a \"Hollywood\" Microlensing Event","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Gould, A. Udalski, B.-G. Park, B. S. Gaudi, C. Beichman, C. B. Henderson, C. Han, C.-U. Lee, D.-J. Kim, D.-J. Lee, G. Bryden, H.-W. Kim, I.-G. Shin, I. Soszynski, J. C. Yee, J. Skowron, K.-H. Hwang, K. Ulaczyk, M. D. Albrow, M. K. Szymanski, M. Pawlak, M. T. Penny, P. Mroz, P. Pietrukowicz, R. Poleski, R. W. Pogge, S. Calchi Novati, S. Jacklin, S.-J. Chung, S. Kozlowski, S.-L. Kim, S.-M. Cha, W. Zhu, Y.-H. Ryu, Y. K. Jung, Y. Lee, Y. Shvartzvald","submitted_at":"2017-09-25T13:21:17Z","abstract_excerpt":"We present microlensing planet OGLE-2017-BLG-0173Lb, with planet-host mass ratio either $q\\simeq 2.5\\times 10^{-5}$ or $q\\simeq 6.5\\times 10^{-5}$, the lowest or among the lowest ever detected. The planetary perturbation is strongly detected, $\\Delta\\chi^2\\sim 10,000$, because it arises from a bright (therefore, large) source passing over and enveloping the planetary caustic: a so-called \"Hollywood\" event. The factor $\\sim 2.5$ offset in $q$ arises because of a previously unrecognized discrete degeneracy between Hollywood events in which the caustic is fully enveloped and those in which only o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.08476","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}