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OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected from Spitzer Only

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dc.abstract.enWe analyze the binary gravitational microlensing event OGLE-2017-BLG-1130 (mass ratio q ˜ 0.45), the first published case in which the binary anomaly was detected only by the Spitzer Space Telescope. This event provides strong evidence that some binary signals can be missed by observations from the ground alone but detected by Spitzer. We therefore invert the normal procedure, first finding the lens parameters by fitting the space-based data and then measuring the microlensing parallax using ground-based observations. We also show that the normal four-fold space-based degeneracy in the single-lens case can become a weak eight-fold degeneracy in binary-lens events. Although this degeneracy is resolved in event OGLE-2017-BLG-1130, it might persist in other events.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorWang, Tianshu
dc.contributor.authorNovati, S. Calchi
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorGould, A.
dc.contributor.authorMao, Shude
dc.contributor.authorZang, W.
dc.contributor.authorBeichman, C.
dc.contributor.authorBryden, G.
dc.contributor.authorCarey, S.
dc.contributor.authorGaudi, B. S.
dc.contributor.authorHenderson, C. B.
dc.contributor.authorShvartzvald, Y.
dc.contributor.authorYee, J. C.
dc.contributor.authorMróz, Przemysław
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorSzymański, Michał
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPawlak, Michał
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S. -J.
dc.contributor.authorHan, C.
dc.contributor.authorHwang, K. -H.
dc.contributor.authorJung, Y. K.
dc.contributor.authorRyu, Y. -H.
dc.contributor.authorShin, I. -G.
dc.contributor.authorZhu, W.
dc.contributor.authorCha, S. -M.
dc.contributor.authorKim, D. -J.
dc.contributor.authorKim, H. -W.
dc.contributor.authorKim, S. -L.
dc.contributor.authorLee, C. -U.
dc.contributor.authorLee, D. -J.
dc.contributor.authorLee, Y.
dc.contributor.authorPark, B. -G.
dc.contributor.authorPogge, R. W.
dc.date.accessioned2024-01-25T15:41:39Z
dc.date.available2024-01-25T15:41:39Z
dc.date.copyright2018-02-25
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume860
dc.identifier.doi10.3847/1538-4357/AABCD2
dc.identifier.issn0004-637X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114517
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018ApJ...860...25W
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal
dc.relation.pages25
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected from Spitzer Only
dc.typeJournalArticle
dspace.entity.typePublication