Results 41 to 50 of about 142 (95)

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
doaj   +1 more source

A novel algorithm for analysing gravitational microlensing events [PDF]

, 2012
Includes abstract.Includes bibliographical references.This dissertation presents a new algorithm that was developed to perform autonomous fitting of gravitational microlensing lightcurves. The algorithm combines features of extant evolutionary algorithms
Rajpaul, Vinesh
core  

OGLE-2017-BLG-0537: A Microlensing Event with a Resolvable Lens in ≲5 years from High-resolution Follow-up Observations [PDF]

, 2018
© 2018. The American Astronomical Society. All rights reserved. We present an analysis of the binary-lens microlensing event OGLE-2017-BLG-0537. The light curve of the event exhibits two strong caustic-crossing spikes among which the second caustic ...
Cha SM, Mróz P, Albrow MD, Kozłowski S, Lee CU, Ryu YH, Hwang KH, Pogge RW, Chung SJ, Kim HW, Lee DJ, Kim WT, Yee JC, Szymański MK, Kim SL, Pietrukowicz P, Gould A, Kim DJ, Udalski A, Zang W, Soszyński I, Park BG, Poleski R, Ulaczyk K, Shin IG, Shvartzvald Y, Skowron J, Pawlak M, Zhu W, Lee Y, Han C, Jung YK   +31 more
core   +3 more sources

microJAX: A Differentiable Framework for Microlensing Modeling with GPU-accelerated Image-centered Ray Shooting

The Astrophysical Journal
We introduce microJAX , the first fully differentiable implementation of the image-centered ray shooting algorithm for gravitational microlensing. Built on JAX and its XLA just-in-time compiler, microJAX exploits GPU parallelism while providing exact ...
Shota Miyazaki, Hajime Kawahara
doaj   +1 more source

MOA-2010-BLG-328: Keck and HST Expose the Limits of Occams Razor in Microlensing

The Astronomical Journal
We present high-resolution follow-up data of the microlensing event MOA-2010-BLG-328, using Keck and the Hubble Space Telescope. Keck data, taken 8 yr after the event, reveal a strong lens detection enabling measurement of lens flux and source-lens ...
Aikaterini Vandorou, David P. Bennett, Jean-Philippe Beaulieu, Aparna Bhattacharya, Joshua W. Blackman, Ian A. Bond, Andrew A. Cole, Naoki Koshimoto, Clément Ranc, Natalia E. Rektsini, Sean K. Terry   +10 more
doaj   +1 more source

The binary gravitational lens and its extreme cases [PDF]

, 1999
The transition of the binary gravitational lens from the equal mass case to small (planetary) mass ratios q is studied. It is shown how the Limit of a (pure shear) Chang-Refsdal lens is approached, under what conditions the Chang-Refsdal approximation is
Dominik, M
core   +2 more sources

Ambiguities in fits of binary lens galactic microlensing events

, 1997
36 pages in LaTeX2e format including 30 PostScript figures, final version accepted for publication in A& ...
openaire   +2 more sources

TESS’s First Bound Microlensing Planet—A Binary Microlensing Event Revealing a Planetary Companion toward the Galactic Plane

The Astrophysical Journal Letters
We report the discovery of Gaia23bra b, the first gravitationally bound microlensing planet detected by the Transiting Exoplanet Survey Satellite (TESS).
Mallory Harris, Diana Dragomir, Etienne Bachelet, Michael Fausnaugh, Samson Johnson   +4 more
doaj   +1 more source

Revisiting a Quasar Microlensing Event Towards AGN J1249+3449

Universe
The gravitational wave event GW190521 seems to be the only BH merger event possibly correlated with an electromagnetic counterpart, which appeared about 34 days after the GW event.
Mario Cazzolla, Francesco De Paolis, Antonio Franco, Achille Nucita   +3 more
doaj   +1 more source

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
doaj   +1 more source