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OGLE-2017-BLG-0039: Microlensing Event with Light from a Lens Identified from Mass Measurement

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dc.abstract.enWe present an analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with a time scale t <SUB>E</SUB> ˜ 130 days, the microlens parallax is measured precisely despite its low value of {π }<SUB>{{E</SUB>}}˜ 0.06. Analysis of the well-resolved caustic crossings during the source star’s entrance and exit of the caustic yields an angular Einstein radius of {θ }<SUB>{{E</SUB>}}˜ 0.6 mas. The measured {π }<SUB>{{E</SUB>}} and {θ }<SUB>{{E</SUB>}} indicate that the lens is a binary composed of two stars with masses ˜ 1.0 {M}<SUB>⊙ </SUB> and ˜0.15 M <SUB>⊙</SUB>, and is located at a distance of ˜6 kpc. From the color and brightness of the lens estimated from its determined mass and distance, it is expected that ˜2/3 of the I-band blended flux comes from the lens. Therefore, the event is a rare case of a bright lens event for which high-resolution follow-up observations can confirm its nature.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSzymański, Michał
dc.contributor.authorSkowron, Jan
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorHan, C.
dc.contributor.authorJung, Y. K.
dc.contributor.authorBond, I.
dc.contributor.authorBozza, V.
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S. -J.
dc.contributor.authorGould, A.
dc.contributor.authorHwang, K. -H.
dc.contributor.authorKim, D.
dc.contributor.authorLee, C. -U.
dc.contributor.authorKim, H. -W.
dc.contributor.authorRyu, Y. -H.
dc.contributor.authorShin, I. -G.
dc.contributor.authorYee, J. C.
dc.contributor.authorShvartzvald, Y.
dc.contributor.authorCha, S. -M.
dc.contributor.authorKim, S. -L.
dc.contributor.authorKim, D. -J.
dc.contributor.authorLee, D. -J.
dc.contributor.authorLee, Y.
dc.contributor.authorPark, B. -G.
dc.contributor.authorPogge, R. W.
dc.contributor.authorMróz, Przemysław
dc.contributor.authorPoleski, Radosław
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPawlak, Michał
dc.contributor.authorAbe, F.
dc.contributor.authorBarry, R.
dc.contributor.authorBennett, D. P.
dc.contributor.authorBhattacharya, A.
dc.contributor.authorDonachie, M.
dc.contributor.authorEvans, P.
dc.contributor.authorFukui, A.
dc.contributor.authorHirao, Y.
dc.contributor.authorItow, Y.
dc.contributor.authorKawasaki, K.
dc.contributor.authorKoshimoto, N.
dc.contributor.authorLi, M. C. A.
dc.contributor.authorLing, C. H.
dc.contributor.authorMatsubara, Y.
dc.contributor.authorMiyazaki, S.
dc.contributor.authorMunakata, H.
dc.contributor.authorMuraki, Y.
dc.contributor.authorNagakane, M.
dc.contributor.authorOhnishi, K.
dc.contributor.authorRanc, C.
dc.contributor.authorRattenbury, N.
dc.contributor.authorSaito, T.
dc.contributor.authorSharan, A.
dc.contributor.authorSullivan, D. J.
dc.contributor.authorSumi, T.
dc.contributor.authorSuzuki, D.
dc.contributor.authorTristram, P. J.
dc.contributor.authorYamada, T.
dc.contributor.authorYonehara, A.
dc.date.accessioned2024-01-25T15:40:55Z
dc.date.available2024-01-25T15:40:55Z
dc.date.copyright2018-09-28
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume867
dc.identifier.doi10.3847/1538-4357/AAE536
dc.identifier.issn0004-637X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114508
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018ApJ...867..136H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal
dc.relation.pages136
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2017-BLG-0039: Microlensing Event with Light from a Lens Identified from Mass Measurement
dc.typeJournalArticle
dspace.entity.typePublication