Results 21 to 30 of about 130 (112)

Gaia20fnr: A binary-lens microlensing event with full orbital motion revealed by four space telescopes

Astronomy & Astrophysics
The microlensing event Gaia20fnr is a long-duration, non-caustic-crossing binary-lens event located at a high Galactic latitude. Triggered by a photometric rise detected by the Gaia space mission, the event was followed up with observations from multiple
Wicker M., Wyrzykowski Ł., Hundertmark M., Rybicki K. A., Zieliński P., Stonkutė E., Gromadzki M., Maskoliūnas M., Ihanec N., Ratajczak M., Bachelet E., Kruszyńska K., Dominik M., Buckley D. A. H., Gezer I., Chené A.-N., Mikołajczyk P., Kotysz K., Majumdar J., Pakštiene E., Zdanavičius J., Čepas V., Jonauskaitė U., Bozza V., Cassan A., Figuera Jaimes R., Rabus M., Rota P., Street R. A., Tsapras Y., Wambsganss J., Awiphan S., Brincat S. M., Budzik Z., Davidson J. W., Dymock R., Galdies C., Godunova V., Hambsch F.-J., Jablonska M., Kowalik P., Kvernadze T., Larma M., Makowska M., Markus Y., Merc J., Michniewicz O., Motylinski M., Popowicz A., Radziwonowicz M., Reichart D., Romanov F. D., Simon A. O., Trzcionkowski P., Wróbel E., Zejmo M., Zola S.   +56 more
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Modeling Binary Lenses and Sources with the BAGLE Python Package

The Astrophysical Journal
Gravitational microlensing is a powerful tool that can be used to find and measure the mass of isolated and dark compact objects. In many microlensing events, the lens, the source, or both may be binary systems.
T. Dex Bhadra, J. R. Lu, Natasha S. Abrams, Andrew Scharf, Edward Broadberry, Casey Lam, Macy J. Huston   +6 more
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Casting Light on Degeneracies: A Comprehensive Study of Lightcurve Variations in Microlensing Events OGLE-2017-BLG-0103 and OGLE-2017-BLG-0192

The Astronomical Journal
This study investigates orbital parallax in gravitational microlensing events, focusing on OGLE-2017-BLG-0103 and OGLE-2017-BLG-0192. For events with timescales ≤60 days, a Jerk-Parallax degeneracy arises due to high Jerk velocity ( $\tilde{{v}_{j ...
Sarang Shah
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Investigating the Binary Source Degeneracy for Wide-orbit Planets

The Astronomical Journal
Wide-orbit planets are particularly sensitive to detection by the Roman Galactic Bulge Time Domain Survey (GBTDS). This study investigates the degeneracy of these events with binary sources, focusing on how observation cadence affects the resolution of ...
Parisa Sangtarash, Jennifer C. Yee
doaj   +1 more source

A Differentiable Binary Microlensing Model Using Adaptive Contour Integration Method

The Astronomical Journal
We present microlux , which is a Jax -based code that can compute the binary microlensing light curve and its derivatives both efficiently and accurately.
Haibin Ren, Wei Zhu
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The BAGLE Python Package for Bayesian Analysis of Gravitational Lensing Events

The Astronomical Journal
We present the open-source Python package, Bayesian Analysis of Gravitational Lensing Events (BAGLE), which enables modeling and joint fitting of photometric and astrometric data sets. We describe the model parameterizations and present the equations for
J. R. Lu, Michael Medford, Casey Y. Lam, T. Dex Bhadra, Macy J. Huston, Natasha S. Abrams, Edward Broadberry, Jeff Chen, Sean K. Terry, Nijaid Arredondo, Andrew Scharf, Raphael A. P. Oliveira   +11 more
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Twinkle: A GPU-based Binary-lens Microlensing Code with the Contour Integration Method

The Astrophysical Journal Supplement Series
With the rapidly increasing rate of microlensing planet detections, microlensing modeling software faces significant challenges in computation efficiency.
Suwei Wang, Lile Wang, Subo Dong
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A Close Binary Lens Revealed by the Microlensing Event Gaia20bof

The Astronomical Journal
During the last 25 yr, hundreds of binary stars and planets have been discovered toward the Galactic bulge by microlensing surveys. Thanks to a new generation of large-sky surveys, it is now possible to regularly detect microlensing events across the ...
E. Bachelet, P. Rota, V. Bozza, P. Zieliński, Y. Tsapras, M. Hundertmark, J. Wambsganss, Ł. Wyrzykowski, P. J. Mikołajczyk, R. A. Street, R. Figuera Jaimes, A. Cassan, M. Dominik, D. A. H. Buckley, S. Awiphan, N. Nakhaharutai, S. Zola, K. A. Rybicki, M. Gromadzki, K. Howil, N. Ihanec, M. Jabłońska, K. Kruszyńska, K. Kruszyńska, U. Pylypenko, M. Ratajczak, M. Sitek, M. Rabus   +27 more
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Where are the binary source galactic microlensing events?

, 1998
Though there have been some galactic microlensing events which show a clear signature of a binary lens, no event has yet been claimed as due to lensing of a binary source. Here I argue that this may be due to the fact that most of the binary source events show light curves which can be fitted with the simpler model of a blended single source.
openaire   +2 more sources

OGLE-2017-BLG-0448Lb: A Low Mass–Ratio Wide-orbit Microlensing Planet?

The Astronomical Journal
The gravitational microlensing technique is most sensitive to planets in a Jupiter-like orbit and has detected more than 200 planets. However, only a few wide-orbit ( s > 2) microlensing planets have been discovered, where s is the planet-to-host ...
Ruocheng Zhai, Radosław Poleski, Weicheng Zang, Youn Kil Jung, Andrzej Udalski, Renkun Kuang, Leading Authors, Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Cheongho Han, Kyu-Ha Hwang, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Hongjing Yang, Jennifer C. Yee, Sang-Mok Cha, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, The KMTNet Collaboration, Jan Skowron, Michał K. Szymański, Igor Soszyński, Krzysztof Ulaczyk, Paweł Pietrukowicz, Szymon Kozłowski, Przemek Mróz, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, Mariusz Gromadzki, The OGLE Collaboration, Hanyue Wang, Shude Mao, Jiyuan Zhang, Qiyue Qian, Wei Zhu, The MAP Collaboration   +44 more
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