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Street, R. A.; Bachelet, E.; Tsapras, Y.; Hundertmark, M. P. G.; Bozza, V.; Dominik, M.; Bramich, D. M.; Cassan, A.; Horne, K.; Mao, S.; Saha, A.; Wambsganss, J.; Zang, Weicheng; Jørgensen, U. G.; Longa-Peña, P.; Peixinho, N.; Sajadian, S.; Burgdorf, M. J.; Campbell-White, J.; Dib, S.; Evans, D. F.; Fujii, Y. I.; Hinse, T. C.; Khalouei, E.; Lowry, S.; Rahvar, S.; Rabus, M.; Skottfelt, J.; Snodgrass, C.; Southworth, J. and Tregloan-Reed, J.
(2019).
DOI: https://doi.org/10.3847/1538-3881/ab1538
Abstract
We report observations of the binary microlensing event OGLE-2018-BLG-0022, provided by the Robotic Observations of Microlensing Events (ROME)/Reactive Event Assessment (REA) Survey, which indicate that the lens is a low-mass binary star consisting of M3 (0.375 ± 0.020 M⊙) and M7 (0.098 ± 0.005 M⊙) components. The lens is unusually close, at 0.998 ± 0.047 kpc, compared with the majority of microlensing events, and despite its intrinsically low luminosity, it is likely that adaptive optics observations in the near future will be able to provide an independent confirmation of the lens masses.
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About
- Item ORO ID
- 61398
- Item Type
- Journal Item
- ISSN
- 1538-3881
- Keywords
- general binaries; micro gravitational lensing; photometric techniques
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Research Group
-
Centre for Electronic Imaging (CEI)
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- © 2019 The American Astronomical Society
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- ORO Import