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We report the discovery and analysis of the planetary microlensing event OGLE-2017-BLG-0406, which was observed both from the ground and by the ${\it Spitzer}$ satellite in a solar orbit. At high magnification, the anomaly in the light…

地球与行星天体物理 · 物理学 2020-07-29 Yuki Hirao , David P. Bennett , Yoon-Hyun Ryu , Naoki Koshimoto , Andrzej Udalski , Jennifer C. Yee , Takahiro Sumi , Ian A. Bond , Yossi Shvartzvald , Fumio Abe , Richard K. Barry , Aparna Bhattacharya , Martin Donachie , Akihiko Fukui , Yoshitaka Itow , Iona Kondo , Man Cheung Alex Li , Yutaka Matsubara , Taro Matsuo , Shota Miyazaki , Yasushi Muraki , Masayuki Nagakane , Clement Ranc , Nicholas J. Rattenbury , Haruno Suematsu , Hiroshi Shibai , Daisuke Suzuki , Paul J. Tristram , Atsunori Yonehara , J. Skowron , R. Poleski , P. Mroz , M. K. Szymanski , I. Soszynski , S. Kozlowski , P. Pietrukowicz , K. Ulaczyk , K. Rybicki , P. Iwanek , Michael D. Albrow , Sun-Ju Chung , Andrew Gould , Cheongho Han , Kyu-Ha Hwang , Youn Kil Jung , In-Gu Shin , 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 , Charles A. Beichman , Geoffery Bryden , Sebastiano Calchi Novati , Sean Carey , B. Scott Gaudi , Calen B. Henderson , Wei Zhu , Etienne Bachelet , Greg Bolt , Grant Christie , Markus Hundertmark , Tim Natusch , Dan Maoz , Jennie McCormick , Rachel A. Street , Thiam-Guan Tan , Yiannis Tsapras , U. G. Jorgensen , M. Dominik , V. Bozza , J. Skottfelt , C. Snodgrass , S. Ciceri , R. Figuera Jaimes , D. F. Evans , N. Peixinho , T. C. Hinse , M. J. Burgdorf , J. Southworth , S. Rahvar , S. Sajadian , M. Rabus , C. von Essen , Y. I. Fujii , J. Campbell-White , S. Lowry , C. Helling , L. Mancini , L. Haikala , Ryo Kandori

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…

We report the discovery and analysis of a planet in the microlensing event OGLE-2018-BLG-0799. The planetary signal was observed by several ground-based telescopes, and the planet-host mass ratio is $q = (2.65 \pm 0.16) \times 10^{-3}$. The…

We report the discovery of a Jupiter-mass planet orbiting an M-dwarf star that gave rise to the microlensing event OGLE-2011-BLG-0265. Such a system is very rare among known planetary systems and thus the discovery is important for…

地球与行星天体物理 · 物理学 2015-06-23 J. Skowron , I. -G. Shin , A. Udalski , C. Han , T. Sumi , Y. Shvartzvald , A. Gould , D. Dominis-Prester , R. A. Street , U. G. Jørgensen , D. P. Bennett , V. Bozza , M. K. Szymański , M. Kubiak , G. Pietrzyński , I. Soszyński , R. Poleski , S. Kozłowski , P. Pietrukowicz , K. Ulaczyk , Ł. Wyrzykowski , F. Abe , A. Bhattacharya , I. A. Bond , C. S. Botzler , M. Freeman , A. Fukui , D. Fukunaga , Y. Itow , C. H. Ling , N. Koshimoto , K. Masuda , Y. Matsubara , Y. Muraki , S. Namba , K. Ohnishi , L. C. Philpott , N. Rattenbury , T. Saito , D. J. Sullivan , D. Suzuki , P. J. Tristram , P. C. M. Yock , D. Maoz , S. Kaspi , M. Friedman , L. A. Almeida , V. Batista , G. Christie , J. -Y. Choi , D. L. DePoy , B. S. Gaudi , C. Henderson , K. -H. Hwang , F. Jablonski , Y. K. Jung , C. -U. Lee , J. McCormick , T. Natusch , H. Ngan , H. Park , R. W. Pogge , J. Yee , M. D. Albrow , E. Bachelet , J. -P. Beaulieu , S. Brillant , J. A. R. Caldwell , A. Cassan , A. Cole , E. Corrales , Ch. Coutures , S. Dieters , J. Donatowicz , P. Fouqué , J. Greenhill , N. Kains , S. R. Kane , D. Kubas , J. -B. Marquette , R. Martin , J. Menzies , K. R. Pollard , C. Ranc , K. C. Sahu , J. Wambsganss , A. Williams , D. Wouters , Y. Tsapras , D. M. Bramich , K. Horne , M. Hundertmark , C. Snodgrass , I. A. Steele , K. A. Alsubai , P. Browne , M. J. Burgdorf , S. Calchi Novati , P. Dodds , M. Dominik , S. Dreizler , X. -S. Fang , C. -H. Gu , Hardis , K. Harpsøe , F. V. Hessman , T. C. Hinse , A. Hornstrup , J. Jessen-Hansen , E. Kerins , C. Liebig , M. Lund , M. Lundkvist , L. Mancini , M. Mathiasen , M. T. Penny , S. Rahvar , D. Ricci , G. Scarpetta , J. Skottfelt , J. Southworth , J. Surdej , J. Tregloan-Reed , O. Wertz

We report the discovery of a $Spitzer$ microlensing planet OGLE-2018-BLG-0596Lb, with preferred planet-host mass ratio $q \sim 2\times10^{-4}$. The planetary signal, which is characterized by a short $(\sim 1~{\rm day})$ "bump" on the…

We present the analysis of high resolution follow-up observations of OGLE-2016-BLG-1195 using Laser Guide Star Adaptive Optics with Keck, seven years after the event's peak. We resolve the lens, measuring its flux and the relative…

We report the discovery and the analysis of the planetary microlensing event, OGLE-2013-BLG-1761. There are some degenerate solutions in this event because the planetary anomaly is only sparsely sampled. But the detailed light curve…

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…

地球与行星天体物理 · 物理学 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

We present the analysis of the binary-lens microlensing event OGLE-2013-BLG-0911. The best-fit solutions indicate the binary mass ratio of q~0.03 which differs from that reported in Shvartzvald+2016. The event suffers from the well-known…

Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively breaks a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive…

We report the discovery of a planetary system from observation of the high-magnification microlensing event OGLE-2012-BLG-0026. The lensing light curve exhibits a complex central perturbation with multiple features. We find that the…

In this paper, we report the discovery of a binary composed of a brown dwarf and a low-mass M dwarf from the observation of the microlensing event OGLE-2014-BLG-0257. Resolution of the very short-lasting caustic crossing combined with the…

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…

We present the analysis of the gravitational microlensing event OGLE-2011-BLG-0251. This anomalous event was observed by several survey and follow-up collaborations conducting microlensing observations towards the Galactic Bulge. Based on…

地球与行星天体物理 · 物理学 2015-06-15 N. Kains , R. Street , J. -Y. Choi , C. Han , A. Udalski , L. A. Almeida , F. Jablonski , P. Tristram , U. G. Jorgensen , M. K. Szymanski , M. Kubiak , G. Pietrzynski , I. Soszynski , R. Poleski , S. Kozlowski , P. Pietrukowicz , K. Ulaczyk , L. Wyrzykowski , J. Skowron , K. A. Alsubai , V. Bozza , P. Browne , M. J. Burgdorf , S. Calchi Novati , P. Dodds , M. Dominik , S. Dreizler , X. -S. Fang , F. Grundahl , C. -H. Gu , S. Hardis , K. Harpsoe , F. V. Hessman , T. C. Hinse , A. Hornstrup , M. Hundertmark , J. Jessen-Hansen , E. Kerins , C. Liebig , M. Lund , M. Lundkvist , L. Mancini , M. Mathiasen , M. T. Penny , S. Rahvar , D. Ricci , K. C. Sahu , G. Scarpetta , J. Skottfelt , C. Snodgrass , J. Southworth , J. Surdej , J. Tregloan-Reed , J. Wambsganss , O. Wertz , D. Bajek , D. M. Bramich , K. Horne , S. Ipatov , I. A. Steele , Y. Tsapras , F. Abe , D. P. Bennett , I. A. Bond , C. S. Botzler , P. Chote , M. Freeman , A. Fukui , K. Furusawa , Y. Itow , C. H. Ling , K. Masuda , Y. Matsubara , N. Miyake , Y. Muraki , K. Ohnishi , N. Rattenbury , T. Saito , D. J. Sullivan , T. Sumi , D. Suzuki , K. Suzuki , W. L. Sweatman , S. Takino , K. Wada , P. C. M. Yock , W. Allen , V. Batista , S. -J. Chung , G. Christie , D. L. DePoy , J. Drummond , B. S. Gaudi , A. Gould , C. Henderson , Y. -K. Jung , J. -R. Koo , C. -U. Lee , J. McCormick , D. McGregor , J. A. Munoz , T. Natusch , H. Ngan , H. Park , R. W. Pogge , I. -G. Shin , J. Yee , M. D. Albrow , E. Bachelet , J. -P. Beaulieu , S. Brillant , J. A. R. Caldwell , A. Cassan , A. Cole , E. Corrales , Ch. Coutures , S. Dieters , D. Dominis Prester , J. Donatowicz , P. Fouque , J. Greenhill , S. R. Kane , D. Kubas , J. -B. Marquette , R. Martin , P. Meintjes , J. Menzies , K. R. Pollard , A. Williams , D. Wouters , M. Zub

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…

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