{"paper":{"title":"OGLE-2017-BLG-0039: Microlensing Event with Light from the Lens Identified from Mass Measurement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Bhattacharya, A. Fukui, A. Gould, A. Sharan, A. Udalski, A. Yonehara, B.-G. Park, C. Han, C. H. Ling, C. Ranc, C.-U. Lee, D.-J. Kim, D.-J. Lee, D. J. Sullivan, D. Kim, D. P. Bennett, D. Suzuki, F. Abe, H. Munakata, H.-W. Kim, I. Bond, I.-G. Shin, I. Soszy\\'nski, J. C. Yee, J. Skowron, K.-H. Hwang, K. Kawasaki, K. Ohnishi, K. Ulaczyk, M. C. A. Li, M. D. Albrow, M. Donachie, M. K. Szyma\\'nski, M. Nagakane, M. Pawlak, N. Koshimoto, N. Rattenbury, P. Evans, P. J. Tristram, P. Mr\\'oz, P. Pietrukowicz, R. Barry, R. Poleski, R. W. Pogge, S.-J. Chung, S. Koz{\\l}owski, S.-L. Kim, S.-M. Cha, S. Miyazaki, T. Saito, T. Sumi, T. Yamada, V. Bozza, Y. Hirao, Y.-H. Ryu, Y. Itow, Y. K. Jung, Y. Lee, Y. Matsubara, Y. Muraki, Y. Shvartzvald","submitted_at":"2018-09-28T02:43:14Z","abstract_excerpt":"We present the analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with an event time scale $t_{\\rm E}\\sim 130$ days, the microlens parallax is precisely measured despite its small value of $\\pie\\sim 0.06$. The analysis of the well-resolved caustic crossings during both the source star's entrance and exit of the caustic yields the angular Einstein radius $\\thetae\\sim 0.6$~mas. The measured $\\pie$ and $\\thetae$ indicate that the lens is a binary composed of two stars with masses $\\sim 1.0~M_\\odot$ and $\\sim 0.15~M_\\odot$,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.10831","kind":"arxiv","version":1},"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"}