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KMT-2016-BLG-0212: First KMTNet-Only Discovery of a Substellar Companion

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arxiv 1802.10246 v1 pith:G2QLG27J submitted 2018-02-28 astro-ph.EP

KMT-2016-BLG-0212: First KMTNet-Only Discovery of a Substellar Companion

K.-H. Hwang , H.-W. Kim , D.-J. Kim , A. Gould , M. D. Albrow , S.-J. Chung , C. Han , Y. K. Jung
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Y.-H. Ryu I.-G. Shin Y. Shvartzvald J. C. Yee W. Zang W. Zhu S.-M. Cha S.-L. Kim C.-U. Lee D.-J. Lee Y. Lee B.-G. Park R. W. Pogge
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keywords microlensinganomalydataeventkmt-2016-blg-0212respectivelysolutionsanalysis
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We present the analysis of KMT-2016-BLG-0212, a low flux-variation $(I_{\rm flux-var}\sim 20$) microlensing event, which is well-covered by high-cadence data from the three Korea Microlensing Telescope Network (KMTNet) telescopes. The event shows a short anomaly that is incompletely covered due to the brief visibility intervals that characterize the early microlensing season when the anomaly occurred. We show that the data are consistent with two classes of solutions, characterized respectively by low-mass brown-dwarf $(q=0.037)$ and sub-Neptune $(q<10^{-4})$ companions, respectively. Future high-resolution imaging should easily distinguish between these solutions.

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