Rapid analysis of binary lens gravitational microlensing light curves [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 A new algorithm for the autonomous fitting of light curves of gravitational microlensing by binary lenses is presented here. The algorithm relies on the combination of artificial neural networks with a conventional amoeba (downhill simplex) method to achieve a success rate of 68 per cent using strict success criteria, in an average fitting time of 48 s
P. Vermaak
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Distribution of caustic-crossing intervals for Galactic binary-lens microlensing events [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 Detection of caustic crossings of binary-lens gravitational microlensing events is important because by detecting them one can obtain useful information both about the lens and source star. In this paper, we compute the distribution of the intervals between two successive caustic crossings, $f(t_{\rm cc})$, for Galactic bulge binary-lens events to ...
Cheongho Han, S.-H. Park, Y.-S. Lee
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A Bayesian algorithm for model selection applied to caustic-crossing binary-lens microlensing events [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We present a full Bayesian algorithm designed to perform automated searches of the parameter space of caustic-crossing binary-lens microlensing events. This builds on previous work implementing priors derived from Galactic models and geometrical considerations.
N. Kains +4 more
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Kepler Rotation Effects on the Binary-Lens Microlensing Events [PDF]
Progress of Theoretical Physics, 1999 24 pages, 8 figures, accepted in Progress of Theoretical Physics Vol ...
K. Ioka, R. Nishi, Y. Kan-ya
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OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected through the Channel of a Gravitational Binary-lens Event [PDF]
The Astrophysical Journal, 2017 Abstract Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object.
Cheongho Han +17 more
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Three binary-source binary-lens microlensing events from the 2024 microlensing campaign [PDF]
Publications of the Astronomical Society of the PacificAbstract We investigated microlensing events detected by the Optical Gravitational Lensing Experiment (OGLE) and Korea Microlensing Telescope Network surveys during the 2024 observing season, focusing on those that exhibit very complex anomaly features.
Cheongho Han +29 more
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Effect of a Wide Binary Companion to the Lens on the Astrometric Behavior of Gravitational Microlensing Events [PDF]
The Astrophysical Journal, 2002 In this paper, we investigate the effect of a wide binary companion of the lens on the astrometric behavior of Galactic gravitational microlensing events and compare it to the effect on the photometric behavior. We find that the wide binary companion of the lens can affect the centroid motion of images substantially even if the corresponding light ...
J. An, Cheongho Han
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Ambiguities in fits of binary lens galactic microlensing events [PDF]
, 1997 36 pages in LaTeX2e format including 30 PostScript figures, final version accepted for publication in A& ...
M. Dominik
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First Resolution of Microlensed Images of a Binary-lens Event
The Astrophysical JournalWe resolve the multiple images of the binary-lens microlensing event ASASSN-22av using the GRAVITY instrument of the Very Large Telescope Interferometer (VLTI).
Zexuan Wu +75 more
doaj +8 more sources
TWO STARS TWO WAYS: CONFIRMING A MICROLENSING BINARY LENS SOLUTION WITH A SPECTROSCOPIC MEASUREMENT OF THE ORBIT [PDF]
The Astrophysical Journal, 2016 ABSTRACT Light curves of microlensing events involving stellar binaries and planetary systems can provide information about the orbital elements of the system due to orbital modulations of the caustic structure. Accurately measuring the orbit in either the stellar or planetary case requires detailed modeling of subtle deviations in the ...
Jennifer C. Yee +7 more
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