Related papers: OGLE-2017-BLG-0329L: A Microlensing Binary Charact…

Adaptive Optics Imaging Breaks the Central Caustic Cusp Approach Degeneracy in High Magnification Microlensing Events

We report new results for the gravitational microlensing target OGLE-2011-BLG-0950 from adaptive optics (AO) images using the Keck observatory. The original analysis by Choi et al. 2012 reports degenerate solutions between planetary and…

Earth and Planetary Astrophysics · Physics 2022-11-03 Sean K. Terry , David P. Bennett , Aparna Bhattacharya , Naoki Koshimoto , Jean-Phillipe Beaulieu , Joshua W. Blackman , Ian A. Bond , Andrew A. Cole , Jessica R. Lu , Jean Baptiste Marquette , Clément Ranc , Natalia Rektsini , Aikaterini Vandorou

MagAO observations of the binary microlens OGLE-2014-BLG-1050 prefer the higher-mass solution

We report adaptive-optics (AO) follow-up imaging of OGLE-2014-BLG-1050, which is the second binary microlensing event with space-based parallax measurements. The degeneracy in microlens parallax pi_E led to two sets of solutions, either a…

Solar and Stellar Astrophysics · Physics 2021-12-16 Xiaojia Xie , Subo Dong , Wei Zhu , A. Gould , A. Udalski , J. -P. Beaulieu , L. M. Close , J. R. Males , J. -B. Marquette , K. M. Morzinski , R. W. Pogge , J. C. Yee

$Spitzer$ Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-Rotating Low-Mass Brown Dwarf

The kinematics of isolated brown dwarfs in the Galaxy, beyond the solar neighborhood, is virtually unknown. Microlensing has the potential to probe this hidden population, as it can measure both the mass and five of the six phase-space…

Solar and Stellar Astrophysics · Physics 2019-02-20 Yossi Shvartzvald , Jennifer C. Yee , Jan Skowron , Chung-Uk Lee , Andrzej Udalski , Sebastiano Calchi Novati , Valerio Bozza , Charles A. Beichman , Geoffery Bryden , Sean Carey , B. Scott Gaudi , Calen B. Henderson , Wei Zhu , Etienne Bachelet , Greg Bolt , Grant Christie , Dan Maoz , Tim Natusch , Richard W. Pogge , Rachel A. Street , Thiam-Guan Tan , Yiannis Tsapras , Paweł Pietrukowicz , Igor Soszyński , Michał K. Szymański , Przemek Mróz , Radoslaw Poleski , Szymon Kozłowski , Krzysztof Ulaczyk , Michał Pawlak , Krzysztof A. Rybicki , Patryk Iwanek , Michael D. Albrow , Sang-Mok Cha , Sun-Ju Chung , Andrew Gould , Cheongho Han , Kyu-Ha Hwang , Youn Kil Jung , Dong-Jin Kim , Hyoun-Woo Kim , Seung-Lee Kim , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Yoon-Hyun Ryu , In-Gu Shin , Weicheng Zang , Martin Dominik , Christiane Helling , Markus Hundertmark , Uffe G. Jørgensen , Penelope Longa-Peña , Stephen Lowry , Sedighe Sajadian , Martin J. Burgdorf , Justyn Campbell-White , Simona Ciceri , Daniel F. Evans , Yuri I. Fujii , Tobias C. Hinse , Sohrab Rahvar , Markus Rabus , Jesper Skottfelt , Colin Snodgrass , John Southworth

Spitzer Microlensing parallax reveals two isolated stars in the Galactic bulge

We report the mass and distance measurements of two single-lens events from the 2017 Spitzer microlensing campaign. The ground-based observations yield the detection of finite-source effects, and the microlens parallaxes are derived from…

Solar and Stellar Astrophysics · Physics 2020-03-04 Weicheng Zang , Yossi Shvartzvald , Tianshu Wang , Andrzej Udalski , Chung-Uk Lee , Takahiro Sumi , Jesper Skottfelt , Shun-Sheng Li , Shude Mao , Wei Zhu , Jennifer C. Yee , Sebastiano Calchi Novati , Charles A. Beichman , Geoffery Bryden , Sean Carey , B. Scott Gaudi , Calen B. Henderson , Przemek Mróz , Jan Skowron , Radoslaw Poleski , Michał K. Szymański , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof Ulaczyk , Krzysztof A. Rybicki , Patryk Iwanek , Etienne Bachelet , Grant Christie , Jonathan Green , Steve Hennerley , Dan Maoz , Tim Natusch , Richard W. Pogge , Rachel A. Street , Yiannis Tsapras , Michael D. Albrow , Sun-Ju Chung , Andrew Gould , Cheongho Han , Kyu-Ha Hwang , Youn Kil Jung , Yoon-Hyun Ryu , In-Gu Shin , Sang-Mok Cha , Dong-Jin Kim , Hyoun-Woo Kim , Seung-Lee Kim , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Richard W. Pogge , Ian A. Bond , Fumio be , Richard Barry , David P. Bennett , Aparna Bhattacharya , Martin Donachie , Akihiko Fukui , Yuki Hirao , Yoshitaka Itow , Iona Kondo , Naoki Koshimoto , Man Cheung Alex Li , Yutaka Matsubara , Yasushi Muraki , Shota Miyazaki , Masayuki Nagakane , Clément Ranc , Nicholas J. Rattenbury , Haruno Suematsu , Denis J. Sullivan , Daisuke Suzuki , Paul J. Tristram , Atsunori Yonehara , Martin Dominik , Markus Hundertmark , Uffe G. Jørgensen , Sohrab Rahvar , Sedighe Sajadian , Colin Snodgrass , Valerio Bozza , Martin J. Burgdorf , Daniel F. Evans , Roberto Figuera Jaimes , Yuri I. Fujii , Luigi Mancini , Penelope Longa-Peña , hristiane Helling , Nuno Peixinho , Markus Rabus , John Southworth , Eduardo Unda-Sanzana , Carolina von Essen

Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035

Context. Brown dwarfs are poorly understood transition objects between stars and planets, with several competing mechanisms having been proposed for their formation. Mass measurements are generally difficult for isolated objects but also…

Solar and Stellar Astrophysics · Physics 2022-07-20 A. Herald , A. Udalski , V. Bozza , P. Rota , I. A. Bond , J. C. Yee , S. Sajadian , P. Mroz , R. Poleski , J. Skowron , M. K. Szymanski , I. Soszynski , P. Pietrukowicz , S. Kozlowski , K. Ulaczyk , K. A. Rybicki , P. Iwanek , M. Wrona , M. Gromadzki , F. Abe , R. Barry , D. P. Bennett , A. Bhattacharya , A. Fukui , H. Fujii , Y. Hirao , Y. Itow , R. Kirikawa , I. Kondo , N. Koshimoto , Y. Matsubara , S. Matsumoto , S. Miyazaki , Y. Muraki , G. Olmschenk , C. Ranc , A. Okamura , N. J. Rattenbury , Y. Satoh , T. Sumi , D. Suzuki , S. Ishitani Silva , T. Toda , P. J. Tristram , A. Vandorou , H. Yama , C. A. Beichman , G. Bryden , S. Calchi Novati , S. Carey , B. S. Gaudi , A. Gould , C. B. Henderson , S. Johnson , Y. Shvartzvald , W. Zhu , M. Dominik , M. Hundertmark , U. G. Jorgensen , P. Longa-Pena , J. Skottfelt , J. Tregloan-Reed , N. Bach-Moller , M. Burgdorf , G. D'Ago , L. Haikala , J. Hitchcock , E. Khalouei , N. Peixinho , S. Rahvar , C. Snodgrass , J. Southworth , P. Spyratos , W. Zang , H. Yang , S. Mao , E. Bachelet , D. Maoz , R. A. Street , Y. Tsapras , G. W. Christie , T. Cooper , L. de Almeida , J. -D. do Nascimento , J. Green , C. Han , S. Hennerley , A. Marmont , J. McCormick , L. A. G. Monard , T. Natusch , R. Pogge

OGLE-2016-BLG-1266: A Probable Brown-Dwarf/Planet Binary at the Deuterium Fusion Limit

We report the discovery, via the microlensing method, of a new very-low-mass binary system. By combining measurements from Earth and from the Spitzer telescope in Earth-trailing orbit, we are able to measure the microlensing parallax of the…

Solar and Stellar Astrophysics · Physics 2018-05-23 M. D. Albrow , J. C. Yee , A. Udalski , S. Calchi Novati , S. Carey , C. B. Henderson , C. Beichman , G. Bryden , B. S. Gaudi , Y. Shvartzvald , M. K. Szymanśki , P. Mroź , J. Skowron , R. Poleski , I. Soszynśki , S. Kozlowski , . Pietrukowicz , K. Ulaczyk , M. Pawlak , S. -J. Chung , A. Gould , C. Han , K. -H. Hwang , Y. K. Jung , Y. -H. Ryu , I. -G. Shin , W. Zhu , 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

Mass Estimates for Some of the Binary Lenses in OGLE III Database

We model binary microlensing events OGLE 2003-BLG-170, 267, and 291. Source angular sizes are measured for the events 267 and 291. Model fits to the light curves give parallaxes for the events 267 and 291, and relative source sizes for 170…

Astrophysics · Physics 2007-05-23 M. Jaroszynski , A. Udalski , M. Kubiak , M. Szymanski , G. Pietrzynski , I. Soszynski , K. Zebrun , O. Szewczyk , L. Wyrzykowski

OGLE-2013-BLG-0578L: Microlensing Binary Composed of A Brown Dwarf And An M Dwarf

Determining physical parameters of binary microlenses is hampered by the lack of information about the angular Einstein radius due to the difficulty of resolving caustic crossings. In this paper, we present the analysis of the binary…

Solar and Stellar Astrophysics · Physics 2015-06-03 H. Park , A. Udalski , C. Han , R. Poleski , J. Skowron , S. Kozłowski , Ł. Wyrzykowski , M. K. Szymański , P. Pietrukowicz , G. Pietrzyński , I. Soszyński , K. Ulaczyk

Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations

We analyze the photometric data obtained by PLANET and OGLE on the caustic-crossing binary-lens microlensing event OGLE-2002-BLG-069. Thanks to the excellent photometric and spectroscopic coverage of the event, we are able to constrain the…

Astrophysics · Physics 2009-11-10 D. Kubas , A. Cassan , J. P. Beaulieu , C. Coutures , M. Dominik , M. D. Albrow , S. Brillant , J. A. R. Caldwell , D. Dominis , J. Donatowicz , P. Fouque , U. G. Jorgensen , J. Greenhill , K. Hill , K. Horne , S. Kane , J. B. Marquette , R. Martin , J. Menzies , K. R. Pollard , K. C. Sahu , C. Vinter , J. Wambsganss , R. Watson , A. Williams , C. Fendt , J. Heinmueller , C. Thurl

Spitzer Opens New Path to Break Classic Degeneracy for Jupiter-Mass Microlensing Planet OGLE-2017-BLG-1140Lb

We analyze the combined Spitzer and ground-based data for OGLE-2017-BLG-1140 and show that the event was generated by a Jupiter-class $(m_p\simeq 1.6\,M_{\rm jup})$ planet orbiting a mid-late M dwarf $(M\simeq 0.2\,M_\odot)$ that lies…

Earth and Planetary Astrophysics · Physics 2018-08-14 S. Calchi Novati , J. Skowron , Y. K. Jung , C. Beichman , G. Bryden , S. Carey , B. S. Gaudi , C. B. Henderson , Y. Shvartzvald , J. C. Yee , W. Zhu , A. Udalski , M. K. Szymański , P. Mróz , R. Poleski , I. Soszyński , S. Kozłowski , P. Pietrukowicz , K. Ulaczyk , M. Pawlak , K. Rybicki , P. Iwanek , M. D. Albrow , S. -J. Chung , A. Gould , C. Han , K. -H. Hwang , Y. -H. Ryu , I. -G. Shin , W. Zang , 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

An analysis of binary microlensing event OGLE-2015-BLG-0060

We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up…

Earth and Planetary Astrophysics · Physics 2019-06-07 Y. Tsapras , A. Cassan , C. Ranc , E. Bachelet , R. Street , A. Udalski , M. Hundertmark , V. Bozza , J. P. Beaulieu , J. B. Marquette , E. Euteneuer , The RoboNet team , : , D. M. Bramich , M. Dominik , R. Figuera Jaimes , K. Horne , S. Mao , J. Menzies , R. Schmidt , C. Snodgrass , I. A. Steele , J. Wambsganss , The OGLE collaboration , : , P. Mróz , M. K. Szymański , I. Soszyński , J. Skowron , P. Pietrukowicz , S. Kozłowski , R. Poleski , K. Ulaczyk , M. Pawlak , The MiNDSTEp collaboration , : , U. G. Jørgensen , J. Skottfelt , A. Popovas , S. Ciceri , H. Korhonen , M. Kuffmeier , D. F. Evans , N. Peixinho , T. C. Hinse , M. J. Burgdorf , J. Southworth , R. Tronsgaard , E. Kerins , M. I. Andersen , S. Rahvar , Y. Wang , O. Wertz , M. Rabus , S. Calchi Novati , G. D'Ago , G. Scarpetta , L. Mancini , The MOA collaboration , : , F. Abe , Y. Asakura , 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 , Y. Muraki , S. Miyazaki , M. Nagakane , K. Ohnishi , N. Rattenbury , To. Saito , A. Sharan , H. Shibai , D. J. Sullivan , T. Sumi , D. Suzuki , P. J. Tristram , T. Yamada , A. Yonehara

Microlensing Binaries Discovered through High-Magnification Channel

Microlensing can provide a useful tool to probe binary distributions down to low-mass limits of binary companions. In this paper, we analyze the light curves of 8 binary lensing events detected through the channel of high-magnification…

Solar and Stellar Astrophysics · Physics 2015-05-30 I. -G. Shin , J. -Y. Choi , S. -Y. Park , C. Han , A. Gould , T. Sumi , A. Udalski , J. -P. Beaulieu , M. Dominik , W. Allen , M. Bos , G. W. Christie , D. L. Depoy , S. Dong , J. Drummond , A. Gal-Yam , B. S. Gaudi , L. -W. Hung , J. Janczak , S. Kaspi , C. -U. Lee , F. Mallia , D. Maoz , A. Maury , J. McCormick , L. A. G. Monard , D. Moorhouse , J. A. Muñoz , T. Natusch , C. Nelson , B. -G. Park , R. W. Pogge , D. Polishook , Y. Shvartzvald , A. Shporer , G. Thornley , J. C. Yee , F. Abe , D. P. Bennett , I. A. Bond , C. S. Botzler , A. Fukui , K. Furusawa , F. Hayashi , J. B. Hearnshaw , S. Hosaka , Y. Itow , K. Kamiya , P. M. Kilmartin , S. Kobara , A. Korpela , W. Lin , C. H. Ling , S. Makita , K. Masuda , Y. Matsubara , N. Miyake , Y. Muraki , M. Nagaya , K. Nishimoto , K. Ohnishi , T. Okumura , K. Omori , Y. C. Perrott , N. Rattenbury , To. Saito , L. Skuljan , D. J. Sullivan , D. Suzuki , W. L. Sweatman , P. J. Tristram , K. Wada , P. C. M. Yock , M. K. Szymański , M. Kubiak , G. Pietrzyński , I. Soszyński , R. Poleski , K. Ulaczyk , Ł. Wyrzykowski , S. Kozłowski , P. Pietrukowicz , M. D. Albrow , V. Batista , D. M. Bramich , S. Brillant , J. A. R. Caldwell , J. J. Calitz , A. Cassan , A. Cole , K. H. Cook , E. Corrales , Ch. Coutures , S. Dieters , D. Dominis Prester , J. Donatowicz , P. Fouqué , J. Greenhill , M. Hoffman , U. G. Jørgensen , S. R. Kane , D. Kubas , J. -B. Marquette , R. Martin , P. Meintjes , J. Menzies , K. R. Pollard , K. C. Sahu , J. Wambsganss , A. Williams , C. Vinter , M. Zub , A. Allan , P. Browne , K. Horne , C. Snodgrass , I. Steele , R. Street , Y. Tsapras , K. A. Alsubai , V. Bozza , P. Browne , M. J. Burgdorf , S. Calchi Novati , P. Dodds , S. Dreizler , F. Finet , T. Gerner , M. Glitrup , F. Grundahl , S. Hardis , K. Harpsøe , F. V. Hessman , T. C. Hinse , M. Hundertmark , N. Kains , E. Kerins , C. Liebig , G. Maier , L. Mancini , M. Mathiasen , M. T. Penny , S. Proft , S. Rahvar , D. Ricci , G. Scarpetta , S. Schäfer , F. Schönebeck , J. Skottfelt , J. Surdej , J. Southworth , F. Zimmer

OGLE-2014-BLG-0289: Precise Characterization of a Quintuple-Peak Gravitational Microlensing Event

We present the analysis of the binary-microlensing event OGLE-2014-BLG-0289. The event light curve exhibits very unusual five peaks where four peaks were produced by caustic crossings and the other peak was produced by a cusp approach. It…

Solar and Stellar Astrophysics · Physics 2018-02-07 A. Udalski , C. Han , V. Bozza , A. Gould , I. A. Bond , P. Mróz , J. Skowron , Ł. Wyrzykowski , M. K. Szymański , I. Soszyński , K. Ulaczyk , R. Poleski , P. Pietrukowicz , S. Kozłowski , 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 , K. Masuda , 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 , E. Bachelet , D. M. Bramich , G. DÁgo , M. Dominik , R. Figuera Jaimes , K. Horne , M. Hundertmark , N. Kains , J. Menzies , R. Schmidt , C. Snodgrass , I. A. Steele , J. Wambsganss , R. W. Pogge , Y. K. Jung , I. -G. Shin , J. C. Yee , W. -T. Kim , C. Beichman , S. Carey , S. Calchi Novati , W. Zhu

OGLE-2019-BLG-0960Lb: The Smallest Microlensing Planet

We report the analysis of OGLE-2019-BLG-0960, which contains the smallest mass-ratio microlensing planet found to date (q = 1.2--1.6 x 10^{-5} at 1-sigma). Although there is substantial uncertainty in the satellite parallax measured by…

Earth and Planetary Astrophysics · Physics 2021-10-13 Jennifer C. Yee , Weicheng Zang , Andrzej Udalski , Yoon-Hyun Ryu , Jonathan Green , Steve Hennerley , Andrew Marmont , Takahiro Sumi , Shude Mao , Mariusz Gromadzki , Przemek Mróz , Jan Skowron , Radoslaw Poleski , Michał K. Szymański , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof Ulaczyk , Krzysztof A. Rybicki , Patryk Iwanek , Marcin Wrona , Michael D. Albrow , Sun-Ju Chung , Andrew Gould , Cheongho Han , Kyu-Ha Hwang , Youn Kil Jung , Hyoun-Woo Kim , In-Gu Shin , Yossi Shvartzvald , Sang-Mok Cha , Dong-Jin Kim , Seung-Lee Kim , Chung-Uk Lee , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Richard W. Pogge , Etienne Bachelet , Grant Christie , Markus P. G. Hundertmark , Dan Maoz , Jennie McCormick , Tim Natusch , Matthew T. Penny , Rachel A. Street , Yiannis Tsapras , Charles A. Beichman , Geoffery Bryden , Sebastiano Calchi Novati , Sean Carey , B. Scott Gaudi , Calen B. Henderson , Samson Johnson , Wei Zhu , Ian A. Bond , Fumio Abe , Richard Barry , David P. Bennett , Aparna Bhattacharya , Martin Donachie , Hirosane Fujii , Akihiko Fukui , Yuki Hirao , Stela Ishitani Silva , Yoshitaka Itow , Rintaro Kirikawa , Iona Kondo , Naoki Koshimoto , Man Cheung Alex Li , Yutaka Matsubara , Yasushi Muraki , Shota Miyazaki , Greg Olmschenk , Clément Ranc , Nicholas J. Rattenbury , Yuki Satoh , Hikaru Shoji , Daisuke Suzuki , Yuzuru Tanaka , Paul J. Tristram , Tsubasa Yamawaki , Atsunori Yonehara

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-2015-BLG-0845L: A low-mass M dwarf from the microlensing parallax and xallarap effects

We present the analysis of the microlensing event OGLE-2015-BLG-0845, which was affected by both the microlensing parallax and xallarap effects. The former was detected via the simultaneous observations from the ground and Spitzer, and the…

Solar and Stellar Astrophysics · Physics 2024-08-08 Zhecheng Hu , Wei Zhu , Andrew Gould , Andrzej Udalski , Takahiro Sumi , Ping Chen , Sebastiano Calchi Novati , Jennifer C. Yee , Charles A. Beichman , Geoffery Bryden , Sean Carey , Michael Fausnaugh , B. Scott Gaudi , Calen B. Henderson , Yossi Shvartzvald , Benjamin Wibking , Przemek Mróz , Jan Skowron , Radosław Poleski , Michał K. Szymański , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof Ulaczyk , Krzysztof A. Rybicki , Patryk Iwanek , Marcin Wrona , Mariusz Gromadzki , 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 , Naoki Koshimoto , Yutaka Matsubara , Shota Miyazaki , Yasushi Muraki , Greg Olmschenk , Clément Ranc , Nicholas J. Rattenbury , Yuki Satoh , Daisuke Suzuki , Mio Tomoyoshi , Paul. J. Tristram , Aikaterini Vandorou , Hibiki Yama , Kansuke Yamashita

Automated detection and modeling of binary microlensing events in OGLE-IV data. I. Events with well-separated bumps

Gravitational microlensing depends primarily on the lens mass and presents a larger occurrence rate in crowded regions, which makes it the best tool to uncover the initial mass function (IMF) of low-mass stars in the Galactic bulge. The…

Astrophysics of Galaxies · Physics 2025-06-12 R. A. P. Oliveira , R. Poleski , P. Mróz , A. Udalski , J. Skowron , M. Mróz , M. K. Szymański , I. Soszyński , K. Ulaczyk , P. Pietrukowicz , K. Rybicki , P. Iwanek , M. Wrona , M. Gromadzki

OGLE-2012-BLG-0950Lb: The First Planet Mass Measurement from Only Microlens Parallax and Lens Flux

We report the discovery of a microlensing planet OGLE-2012-BLG-0950Lb with the planet/host mass ratio of $q \sim 2 \times 10^{-4}$. A long term distortion detected in both MOA and OGLE light curve can be explained by the microlens parallax…

Earth and Planetary Astrophysics · Physics 2016-12-21 N. Koshimoto , A. Udalski , J. P. Beaulieu , T. Sumi , D. P. Bennett , I. A. Bond , N. Rattenbury , A. Fukui , V. Batista , J. B. Marquette , S. Brillant , F. Abe , Y. Asakura , A. Bhattacharya , M. Donachie , M. Freeman , Y. Hirao , Y. Itow , M. C. A. Li , C. H. Ling , K. Masuda , Y. Matsubara , T. Matsuo , Y. Muraki , K. Ohnishi , H. Oyokawa , To. Saito , A. Sharan , H. Shibai , D. J. Sullivan , D. Suzuki , P. J. Tristram , A. Yonehara , S. Kozlowski , P. Pietrukowicz , R. Poleski , J. Skowron , I. Soszynski , M. K. Szymanski , K. Ulaczyk , L. Wyrzykowski

First simultaneous microlensing observations by two space telescopes: $Spitzer$ & $Swift$ reveal a brown dwarf in event OGLE-2015-BLG-1319

Simultaneous observations of microlensing events from multiple locations allow for the breaking of degeneracies between the physical properties of the lensing system, specifically by exploring different regions of the lens plane and by…

Earth and Planetary Astrophysics · Physics 2016-11-15 Y. Shvartzvald , Z. Li , A. Udalski , A. Gould , T. Sumi , R. A. Street , S. Calchi Novati , M. Hundertmark , V. Bozza , C. Beichman , G. Bryden , S. Carey , J. Drummond , M. Fausnaugh , B. S. Gaudi , C. B. Henderson , T. G. Tan , B. Wibking , R. W. Pogge , J. C. Yee , W. Zhu , Y. Tsapras , E. Bachelet , M. Dominik , D. M. Bramich , A. Cassan , R. Figuera Jaimes , K. Horne , C. Ranc , R. Schmidt , C. Snodgrass , J. Wambsganss , I. A. Steele , J. Menzies , S. Mao , R. Poleski , M. Pawlak , M. K. Szymański , J. Skowron , P. Mróz , S. Kozłowski , Ł. Wyrzykowski , P. Pietrukowicz , I. Soszyński , K. Ulaczyk , F. Abe , Y. Asakura , R. K. Barry , D. P. Bennett , A. Bhattacharya , I. A. Bond , M. Freeman , Y. Hirao , Y. Itow , N. Koshimoto , M. C. A. Li , C. H. Ling , K. Masuda , A. Fukui , Y. Matsubara , Y. Muraki , M. Nagakane , T. Nishioka , K. Ohnishi , H. Oyokawa , N. J. Rattenbury , To. Saito , A. Sharan , D. J. Sullivan , D. Suzuki , P. J. Tristram , A. Yonehara , U. G. Jørgensen , M. J. Burgdorf , S. Ciceri , G. D'Ago , D. F. Evans , T. C. Hinse , N. Kains , E. Kerins , H. Korhonen , L. Mancini , A. Popovas , M. Rabus , S. Rahvar , G. Scarpetta , J. Skottfelt , J. Southworth , N. Peixinho , P. Verma , B. Sbarufatti , J. A. Kennea , N. Gehrels

OGLE-2014-BLG-0221Lb: A Jupiter Mass Ratio Companion Orbiting either a Late-Type Star or a Stellar Remnant

We present the analysis of microlensing event OGLE-2014-BLG-0221, a planetary candidate event discovered in 2014. The photometric light curve is best described by a binary-lens single-source model. Our light curve modeling finds two…

Earth and Planetary Astrophysics · Physics 2023-10-23 Rintaro Kirikawa , Takahiro Sumi , David P. Bennett , Daisuke Suzuki , Naoki Koshimoto , Shota Miyazaki , Ian A. Bond , Andrzej Udalski , Nicholas J. Rattenbury , Fumio Abe , Richard Barry , Aparna Bhattacharya , Hirosane Fujii , Akihiko Fukui , Ryusei Hamada , Yuki Hirao , Stela Ishitani Silva , Yoshitaka Itow , Yutaka Matsubara , Yasushi Muraki , Greg Olmschenk , Clément Ranc , Yuki K. Satoh , Mio Tomoyoshi , Paul . J. Tristram , Aikaterini Vandorou , Hibiki Yama , Kansuke Yamashita , Przemek Mróz , Radosław Poleski , Jan Skowron , Michał K. Szymański , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof Ulaczyk