Related papers: OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth O…

OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star

Microlensing is the only known direct method to measure the masses of stars that lack visible companions. In terms of microlensing observables, the mass is given by M=(c^2/4G)\tilde r_E \theta_E and so requires the measurement of both the…

Astrophysics · Physics 2009-11-10 Guangfei Jiang , D. L. DePoy , A. Gal-Yam , B. S. Gaudi , A. Gould , C. Han , Y. Lipkin , D. Maoz , E. O. Ofek , B. -G. Park , R. W. Pogge , A. Udalski , M. Kubiak , M. K. Szymanski , O. Szewczyk , K. Zebrun , L. Wyrzykowski , I. Soszynski , G. Pietrzynski , M. D. Albrow , J. -P. Beaulieu , J. A. R. Caldwell , A. Cassan , C. Coutures , M. Dominik , J. Donatowicz , P. Fouque , J. Greenhill , K. Hill , K. Horne , S. F. Jorgensen , U. G. Jorgensen , S. Kane , D. Kubas , R. Martin , J. Menzies , K. R. Pollard , K. C. Sahu , J. Wambsganss , R. Watson , A. Williams

Two Jupiter-Mass Planets Discovered by the KMTNet Survey in 2017

We report two microlensing events, KMT-2017-BLG-1038 and KMT-2017-BLG-1146 that are caused by planetary systems. These events were discovered by KMTNet survey observations from the $2017$ bulge season. The discovered systems consist of a…

Earth and Planetary Astrophysics · Physics 2019-03-27 I. -G. Shin , Y. -H. Ryu , J. C. Yee , A. Gould , M. D. Albrow , S. -J. Chung , C. Han , K. -H. Hwang , Y. K. Jung , Y. Shvartzvald , W. Zang , C. -U. Lee , S. -M. Cha , D. -J. Kim , H. -W. Kim , S. -L. Kim , Y. Lee , D. -J. Lee , B. -G. Park , R. W. Pogge

Revisiting MOA 2013 BLG-220L: A Solar-type star with a Cold super-Jupiter Companion

We present the analysis of high-resolution images of MOA-2013-BLG-220, taken with the Keck adaptive optics system 6 years after the initial observation, identifying the lens as a solar-type star hosting a super-Jupiter mass planet. The…

Earth and Planetary Astrophysics · Physics 2020-08-20 Aikaterini Vandorou , David P. Bennett , Jean-Philippe Beaulieu , Christophe L. Alard , Joshua W. Blackman , Andrew A. Cole , Aparna Bhattacharya , Ian A. Bond , Naoki Koshimoto , Jean-Baptiste Marquette

MOA-2019-BLG-008Lb: a new microlensing detection of an object at the planet/brown dwarf boundary

We report on the observations, analysis and interpretation of the microlensing event MOA-2019- BLG-008. The observed anomaly in the photometric light curve is best described through a binary lens model. In this model, the source did not…

Earth and Planetary Astrophysics · Physics 2022-08-17 E. Bachelet , Y. Tsapras , Andrew Gould , R. A. Street , David P. Bennett , M. P. G. Hundertmark , V. Bozza , D. M. Bramich , A. Cassan , M. Dominik , K. Horne , S. Mao , A. Saha , J. Wambsganss , Weicheng Zang , Fumio Abe , Richard Barry , Aparna Bhattacharya , Ian A. Bond , Akihiko Fukui , Hirosane Fujii , Yuki Hirao , Yoshitaka Itow , Rintaro Kirikawa , Naoki Koshimoto , Yutaka Matsubara , Sho Matsumoto , Shota Miyazaki , Yasushi Muraki , Greg Olmschenk , Clément Ranc , Arisa Okamura , Nicholas J. Rattenbury , Yuki Satoh , Takahiro Sumi , Daisuke Suzuki , Stela Ishitani Silva , Taiga Toda , Paul . J. Tristram , Aikaterini Vandorou , Hibiki Yama , Michael D. Albrow , Sun-Ju Chung , Cheongho Han , Kyu-Ha Hwang , Youn Kil Jung , Yoon-Hyun Ryu , In-Gu Shin , Yossi Shvartzvald , Jennifer C. Yee , Sang-Mok Cha , Dong-Jin Kim , Seung-Lee Kim , Chung-Uk Lee , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Richard W. Pogge , Andrzej Udalski , Przemek Mróz , Rados law Poleski , Jan Skowron , Micha l K. Szymański , Igor Soszyński , Pawe l Pietrukowicz , Szymon Kozlowski , Krzysztof Ulaczyk , Krzysztof A. Rybicki , Patryk Iwanek , Marcin Wrona , Mariusz Gromadzki

Microlens OGLE-2005-BLG-169 Implies Cool Neptune-Like Planets are Common

We detect a Neptune mass-ratio (q~8e-5) planetary companion to the lens star in the extremely high-magnification (A~800) microlensing event OGLE-2005-BLG-169. If the parent is a main-sequence star, it has mass M~0.5 M_sun implying a planet…

Astrophysics · Physics 2009-11-11 A. Gould , A. Udalski , D. An , D. P. Bennett , A. -Y. Zhou , S. Dong , N. J. Rattenbury , B. S. Gaudi , P. C. M. Yock , I. A. Bond , G. W. Christie , K. Horne , J. Anderson , K. Z. Stanek , D. L. DePoy , C. Han , J. McCormick , B. -G. Park , R. W. Pogge , S. D. Poindexter , I. Soszynski , M. K. Szymanski , M. Kubiak , G. Pietrzynski , O. Szewczyk , L. Wyrzykowski , K. Ulaczyk , B. Paczynski , D. M. Bramich , C. Snodgrass , I. A. Steele , M. J. Burgdorf , M. F. Bode , C. S. Botzler , S. Mao , S. C. Swaving

OGLE-2013-BLG-0102LA,B: Microlensing binary with components at star/brown-dwarf and brown-dwarf/planet boundaries

We present the analysis of the gravitational microlensing event OGLE-2013-BLG-0102. The light curve of the event is characterized by a strong short-term anomaly superposed on a smoothly varying lensing curve with a moderate magnification…

Solar and Stellar Astrophysics · Physics 2015-06-22 Y. K. Jung , A. Udalski , T. Sumi , C. Han , A. Gould , J. Skowron , S. Kozłowski , R. Poleski , Ł. Wyrzykowski , M. K. Szymański , G. Pietrzyński , I. Soszyński , K. Ulaczyk , P. Pietrukowicz , P. Mróz , M. Kubiak , F. Abe , D. P. Bennett , I. A. Bond , C. S. Botzler , M. Freeman , A. Fukui , D. Fukunaga , Y. Itow , N. Koshimoto , P. Larsen , C. H. Ling , K. Masuda , Y. Matsubara , Y. Muraki , S. Namba , K. Ohnishi , L. Philpott , N. J. Rattenbury , To. Saito , D. J. Sullivan , D. Suzuki , P. J. Tristram , N. Tsurumi , K. Wada , N. Yamai , P. C. M. Yock , A. Yonehara , M. Albrow , J. -Y. Choi , D. L. DePoy , B. S. Gaudi , K. -H. Hwang , C. -U. Lee , H. Park , S. Owen , R. W. Pogge , I. -G. Shin , J. C. Yee

OGLE-2016-BLG-0613LABb: A Microlensing Planet in a Binary System

We present the analysis of OGLE-2016-BLG-0613, for which the lensing light curve appears to be that of a typical binary-lens event with two caustic spikes but with a discontinuous feature on the trough between the spikes. We find that the…

Earth and Planetary Astrophysics · Physics 2017-11-29 C. Han , A. Udalski , A. Gould , C. -U. Lee , Y. Shvartzvald , W. C. Zang , S. Mao , S. Kozłowski , M. D. Albrow , S. -J. Chung , K. -H. Hwang , Y. K. Jung , D. Kim , H. -W. Kim , Y. -H. Ryu , I. -G. Shin , J. C. Yee , W. Zhu , S. -M. Cha , S. -L. Kim , D. -J. Kim , Y. Lee , B. -G. Park , J. Skowron , P. Mróz , P. Pietrukowicz , R. Poleski , M. K. Szymański , I. Soszyński , K. Ulaczyk , M. Pawlak C. Beichman , G. Bryden , S. Calchi Novati , B. S. Gaudi , C. B. Henderson , S. B. Howell , S. Jacklin , M. T. Penny , P. Fouqué , T. S. Wang

OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary

We report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar, an assignation that can be confirmed by two epochs of high-resolution imaging of the combined…

Earth and Planetary Astrophysics · Physics 2018-01-10 Y. -H. Ryu , J. C. Yee , A. Udalski , I. A. Bond , Y. Shvartzvald , W. Zang , R. Figuera Jaimes , U. G. Jorgensen , W. Zhu , C. X. Huang , Y. K. Jung , M. D. Albrow , S. -J. Chung , A. Gould , C. Han , K. -H. Hwang , I. -G. Shin , S. -M. Cha , D. -J. Kim , H. -W. Kim , S. -L. Kim , C. -U. Lee , D. -J. Lee , Y. Lee , B. -G. Park , R. W. Pogge , S. Calchi Novati , S. Carey , C. B. Henderson , C. Beichman , B. S. Gaudi , P. Mróz , R. Poleski , J. Skowron , M. K. Szymanski , I. Soszynski , S. Kozlowski , P. Pietrukowicz , K. Ulaczyk , M. Pawlak , F. Abe , Y. Asakura , R. Barry , D. P. Bennett , A. Bhattacharya , M. Donachie , P. Evans , A. Fukui , Y. Hirao , Y. Itow , K. Kawasaki , N. Koshimoto , M. C. A. Li , C. H. Ling , K. Masuda , Y. Matsubara , S. Miyazaki , Y. Muraki , M. Nagakane , K. Ohnishi , C. Ranc , N. J. Rattenbury , To. Saito , A. Sharan , D. J. Sullivan , T. Sumi , D. Suzuki , P. J. Tristram , T. Yamada , T. Yamada , A. Yonehara , G. Bryden , S. B. Howell , S. Jacklin , M. T. Penny , S. Mao , Pascal Fouque , T. Wang , R. A. Street , Y. Tsapras , M. Hundertmark , E. Bachelet , M. Dominik , Z. Li , S. Cross , A. Cassan , K. Horne , R. Schmidt , J. Wambsganss , S. K. Ment , D. Maoz , C. Snodgrass , I. A. Steele , V. Bozza , M. J. Burgdorf , S. Ciceri , G. D'Ago , D. F. Evans , T. C. Hinse , E. Kerins , R. Kokotanekova , P. Longa , J. MacKenzie , A. Popovas , M. Rabus , S. Rahvar , S. Sejadian , J. Skottfelt , J. Southworth , C. von Essen

Two Stars Two Ways: Confirming a Microlensing Binary Lens Solution with a Spectroscopic Measurement of the Orbit

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…

Solar and Stellar Astrophysics · Physics 2016-04-27 Jennifer C. Yee , John Asher Johnson , Jan Skowron , Andrew Gould , J. Sebastian Pineda , Jason Eastman , Andrew Vanderburg , Andrew Howard

OGLE-2017-BLG-0039: Microlensing Event with Light from the Lens Identified from Mass Measurement

We present the analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with an event time scale $t_{\rm E}\sim 130$ days, the microlens parallax is precisely measured…

Solar and Stellar Astrophysics · Physics 2018-11-28 C. Han , Y. K. Jung , A. Udalski , I. Bond , V. Bozza , M. D. Albrow , S. -J. Chung , A. Gould , K. -H. Hwang , D. Kim , C. -U. Lee , H. -W. Kim , Y. -H. Ryu , I. -G. Shin , J. C. Yee , Y. Shvartzvald , S. -M. Cha , S. -L. Kim , D. -J. Kim , D. -J. Lee , Y. Lee , B. -G. Park , R. W. Pogge , M. K. Szymański , P. Mróz , J. Skowron , R. Poleski , I. Soszyński , S. Kozłowski , P. Pietrukowicz , K. Ulaczyk , M. Pawlak , F. Abe , R. Barry , D. P. Bennett , A. Bhattacharya , M. Donachie , P. Evans , A. Fukui , Y. Hirao , Y. Itow , K. Kawasaki , N. Koshimoto , M. C. A. Li , C. H. Ling , Y. Matsubara , S. Miyazaki , H. Munakata , Y. Muraki , M. Nagakane , K. Ohnishi , C. Ranc , N. Rattenbury , T. Saito , A. Sharan , D. J. Sullivan , T. Sumi , D. Suzuki , P. J. Tristram , T. Yamada , A. Yonehara

OGLE-2015-BLG-0196: Ground-based Gravitational Microlens Parallax Confirmed By Space-Based Observation

In this paper, we present the analysis of the binary gravitational microlensing event OGLE-2015-BLG-0196. The event lasted for almost a year and the light curve exhibited significant deviations from the lensing model based on the…

Earth and Planetary Astrophysics · Physics 2017-01-11 C. Han , A. Udalski , A. Gould , Wei Zhu , M. K. Szymański , I. Soszyński , J. Skowron , P. Mróz , R. Poleski , P. Pietrukowicz , S. Kozłowski , K. Ulaczyk , M. Pawlak , J. C. Yee , C. Beichman , S. Calchi Novati , S. Carey , C. Bryden , M. Fausnaugh , B. S. Gaudi , Calen B. Henderson , Y. Shvartzvald , B. Wibking

Three Saturn-mass Microlensing Planets Identified through Signals from Peripheral-caustic Perturbations

We present the discovery and analysis of three microlensing planets identified through brief positive anomalies on the wings of their light curves. The events, KMT-2021-BLG-0852, KMT-2024-BLG-2005, and KMT-2025-BLG-0481, were detected in…

Earth and Planetary Astrophysics · Physics 2026-02-19 Cheongho Han , Chung-Uk Lee , Andrzej Udalski , Ian A. Bond , Michael D. Albrow , Sun-Ju Chung , Andrew Gould , Youn Kil Jung , Kyu-Ha Hwang , Yoon-Hyun Ryu , Yossi Shvartzvald , In-Gu Shin , Jennifer C. Yee , Weicheng Zang , Hongjing Yang , Doeon Kim , Dong-Jin Kim , Sang-Mok Cha , Seung-Lee Kim , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Kyeongsoo Hong , Richard W. Pogge , Przemek Mróz , Michał K. Szymański , Jan Skowron , Radosław Poleski , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof A. Rybicki , Patryk Iwanek , Krzysztof Ulaczyk , Marcin Wrona , Mariusz Gromadzki , Mateusz J. Mróz , Fumio Abe , David P. Bennett , Aparna Bhattacharya , Ryusei Hamada , Yuki Hirao , Asahi Idei , Stela Ishitani Silva , Shuma Makida , Shota Miyazaki , Yasushi Muraki , Tutumi Nagai , Togo Nagano , Seiya Nakayama , Mayu Nishio , Kansuke Nunota , Ryo Ogawa , Ryunosuke Oishi , Yui Okumoto , Greg Olmschenk , Clément Ranc , Nicholas J. Rattenbury , Yuki Satoh , Takahiro Sumi , Daisuke Suzuki , Takuto Tamaoki , Sean K. Terry , Paul J. Tristram , Aikaterini Vandorou , Hibiki Yama

MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections

Because of the development of large-format, wide-field cameras, microlensing surveys are now able to monitor millions of stars with sufficient cadence to detect planets. These new discoveries will span the full range of significance levels…

Earth and Planetary Astrophysics · Physics 2015-06-03 J. C. Yee , Y. Shvartzvald , A. Gal-Yam , I. A. Bond , A. Udalski , S. Kozlowski , C. Han , A. Gould , J. Skowron , D. Suzuki , the MOA Collaboration , the OGLE Collaboration , the MicroFUN Collaboration

An anomaly detector with immediate feedback to hunt for planets of Earth mass and below by microlensing

(abridged) The discovery of OGLE 2005-BLG-390Lb, the first cool rocky/icy exoplanet, impressively demonstrated the sensitivity of the microlensing technique to extra-solar planets below 10 M_earth. A planet of 1 M_earth in the same spot…

Astrophysics · Physics 2009-11-13 M. Dominik , N. J. Rattenbury , A. Allan , S. Mao , D. M. Bramich , M. J. Burgdorf , E. Kerins , Y. Tsapras , L. Wyrzykowski

An Earth-Mass Planet and a Brown Dwarf in Orbit Around a White Dwarf

Terrestrial planets born beyond 1-3 AU have been theorized to avoid being engulfed during the red-giant phases of their host stars. Nevertheless, only a few gas-giant planets have been observed around white dwarfs (WDs) -- the end product…

Earth and Planetary Astrophysics · Physics 2024-10-07 Keming Zhang , Weicheng Zang , Kareem El-Badry , Jessica R. Lu , Joshua S. Bloom , Eric Agol , B. Scott Gaudi , Quinn Konopacky , Natalie LeBaron , Shude Mao , Sean Terry

KMT-2023-BLG-1431Lb: A New $q < 10^{-4}$ Microlensing Planet from a Subtle Signature

The current studies of microlensing planets are limited by small number statistics. Follow-up observations of high-magnification microlensing events can efficiently form a statistical planetary sample. Since 2020, the Korea Microlensing…

Earth and Planetary Astrophysics · Physics 2023-11-23 Aislyn Bell , Jiyuan Zhang , Youn Kil Jung , Jennifer C. Yee , Hongjing Yang , Takahiro Sumi , Andrzej Udalski , Michael D. Albrow , Sun-Ju Chung , Andrew Gould , Cheongho Han , Kyu-Ha Hwang , Yoon-Hyun Ryu , In-Gu Shin , Yossi Shvartzvald , Weicheng Zang , Sang-Mok Cha , Dong-Jin Kim , Seung-Lee Kim , Chung-Uk Lee , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Richard W. Pogge , Yunyi Tang , Jennie McCormick , Subo Dong , Zhuokai Liu , Shude Mao , Dan Maoz , Wei Zhu , Fumio Abe , Richard Barry , David P. Bennett , Aparna Bhattacharya , Ian A. Bond , Hirosane Fujii , Akihiko Fukui , Ryusei Hamada , Yuki Hirao , Stela Ishitani Silva , Yoshitaka Itow , Rintaro Kirikawa , Iona Kondo , Naoki Koshimoto , Yutaka Matsubara , Sho Matsumoto , Shota Miyazaki , Yasushi Muraki , Arisa Okamura , Greg Olmschenk , Clément Ranc , Nicholas J. Rattenbury , Yuki Satoh , Daisuke Suzuki , Taiga Toda , Mio Tomoyoshi , Paul J. Tristram , Aikaterini Vandorou , Hibiki Yama , Kansuke Yamashita , Przemek Mróz , Jan Skowron , Radoslaw Poleski , Michał K. Szymański , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof Ulaczyk , Krzysztof A. Rybicki , Patryk Iwanek , Marcin Wrona , Mariusz Gromadzki

KMT-2016-BLG-1820 and KMT-2016-BLG-2142: Two Microlensing Binaries Composed of Planetary-mass Companions and Very-Low-Mass Primaries

We present the analyses of two short-timescale $(t_{\rm E} \sim 5~{\rm days})$ microlensing events, KMT-2016-BLG-1820 and KMT-2016-BLG-2142. In both light curves, the brief anomalies were clearly captured and densely covered by the Korea…

Solar and Stellar Astrophysics · Physics 2018-11-14 Youn Kil Jung , Kyu-Ha Hwang , Yoon-Hyun Ryu , Andrew Gould , Cheongho Han , Jennifer C. Yee , Michael D. Albrow , Sun-Ju Chung , In-Gu Shin , Yossi Shvartzvald , Weicheng Zang , 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

Discovering habitable Earths, hot Jupiters and other close planets with microlensing

Searches for planets via gravitational lensing have focused on cases in which the projected separation, a, between planet and star is comparable to the Einstein radius, R_E. This paper considers smaller orbital separations and demonstrates…

Solar and Stellar Astrophysics · Physics 2015-06-03 Rosanne Di Stefano

Microlensing Detections of Moons of Exoplanets

We investigate the characteristic of microlensing signals of Earth-like moons orbiting ice-giant planets. From this, we find that non-negligible satellite signals occur when the planet-moon separation is similar to or greater than the…

Astrophysics · Physics 2009-11-13 Cheongho Han

Six microlensing planets detected via sub-day signals during the 2023 -- 2024 season

We present analyses of six microlensing events: KMT-2023-BLG-0548, KMT-2023-BLG-0830, KMT-2023-BLG-0949, KMT-2024-BLG-1281, KMT-2024-BLG-2059, and KMT-2024-BLG-2242. These were identified in KMTNet data from the 2023 -- 2024 seasons,…

Earth and Planetary Astrophysics · Physics 2025-09-09 Cheongho Han , Chung-Uk Lee , Andrzej Udalski , Ian A. Bond , Michael D. Albrow , Sun-Ju Chung , Andrew Gould , Youn Kil Jung , Kyu-Ha Hwang , Yoon-Hyun Ryu , Yossi Shvartzvald , In-Gu Shin , Jennifer C. Yee , Weicheng Zang , Hongjing Yang , Sang-Mok Cha , Doeon Kim , Dong-Jin Kim , Seung-Lee Kim , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Richard W. Pogge , Przemek Mróz , Michał K. Szymański , Jan Skowron , Radosław Poleski , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof A. Rybicki , Patryk Iwanek , Krzysztof Ulaczyk , Marcin Wrona , Mariusz Gromadzki , Mateusz J. Mróz , Michał Jaroszyński , Marcin Kiraga , Fumio Abe , David P. Bennett , Aparna Bhattacharya , Akihiko Fukui , Ryusei Hamada , Stela Ishitani Silva , Yuki Hirao , Naoki Koshimoto , Yutaka Matsubara , Shota Miyazaki , Yasushi Muraki , Tutumi Nagai , Kansuke Nunota , Greg Olmschenk , Clément Ranc , Nicholas J. Rattenbury , Yuki Satoh , Takahiro Sumi , Daisuke Suzuki , Sean K. Terry , Paul J. Tristram , Aikaterini Vandorou , Hibiki Yama