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

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dc.contributor.authorWang T
dc.contributor.authorNovati SC
dc.contributor.authorUdalski A
dc.contributor.authorGould A
dc.contributor.authorMao S
dc.contributor.authorZang W
dc.contributor.authorBeichman C
dc.contributor.authorBryden G
dc.contributor.authorCarey S
dc.contributor.authorGaudi BS
dc.contributor.authorHenderson CB
dc.contributor.authorShvartzvald Y
dc.contributor.authorYee JC
dc.contributor.authorMroz P
dc.contributor.authorPoleski R
dc.contributor.authorSkowron J
dc.contributor.authorSzymanski MK
dc.contributor.authorSoszynski I
dc.contributor.authorKozlowski S
dc.contributor.authorPietrukowicz P
dc.contributor.authorUlaczyk K
dc.contributor.authorPawlak M
dc.contributor.authorAlbrow MD
dc.contributor.authorChung S-J
dc.contributor.authorHan C
dc.contributor.authorHwang K-H
dc.contributor.authorJung YK
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 RW
dc.date.accessioned2018-04-23T02:23:33Z
dc.date.available2018-04-23T02:23:33Z
dc.date.issued2018en
dc.date.updated2018-04-05T23:36:51Z
dc.description.abstractWe 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 only detected 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.en
dc.identifier.urihttp://hdl.handle.net/10092/15189
dc.language.isoen
dc.subjectastro-ph.EPen
dc.subjectastro-ph.SRen
dc.subject.anzsrcField of Research::02 - Physical Sciences::0201 - Astronomical and Space Sciences::020102 - Astronomical and Space Instrumentationen
dc.subject.anzsrcField of Research::02 - Physical Sciences::0201 - Astronomical and Space Sciencesen
dc.titleOGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected From Spitzer Onlyen
dc.typeJournal Articleen
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