Now showing items 1-20 of 27

    • The First Planetary Microlensing Event with Two Microlensed Source Stars 

      Bennett DP; Udalski A; Han C; Bond IA; Beaulieu JP; Skowron J; Gaudi BS; Koshimoto N; Abe F; Asakura Y; Barry RK; Bhattacharya A; Donachie M; Evans P; Fukui A; Hirao Y; Itow Y; Li MCA; Ling CH; Masuda K; Matsubara Y; Muraki Y; Nagakane M; Ohnishi K; Oyokawa H; Ranc C; Rattenbury NJ; Rosenthal MM; Saito T; Sharan A; Sullivan DJ; Sumi T; Suzuki D; Tristram PJ; Yonehara A; Szymański MK; Poleski R; Soszyński I; Ulaczyk K; Wyrzykowski; Depoy D; Gould A; Pogge RW; Yee JC; Albrow MD; Bachelet E; Batista V; Bowens-Rubin R; Brillant S; Caldwell JAR; Cole A; Coutures C; Dieters S; Prester DD; Donatowicz J; Fouqué P; Horne K; Hundertmark M; Kains N; Kane SR; Marquette JB; Menzies J; Pollard KR; Ranc C; Sahu KC; Wambsganss J; Williams A; Zub M (2018)
      © 2018. The American Astronomical Society. All rights reserved. We present the analysis of the microlensing event MOA-2010-BLG-117, and show that the light curve can only be explained by the gravitational lensing of a ...
    • A free-floating planet candidate from the OGLE and KMTNet surveys 

      Mroz P; Ryu Y-H; Skowron J; Udalski A; Gould A; Szymanski MK; Soszynski I; Poleski R; Pietrukowicz P; Kozlowski S; Pawlak M; Ulaczyk K; Albrow MD; Chung S-J; Jung YK; Han C; Hwang K-H; Shin I-G; Yee JC; Zhu W; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW (2017)
      Current microlensing surveys are sensitive to free-floating planets down to Earth-mass objects. All published microlensing events attributed to unbound planets were identified based on their short timescale (below 2 d), ...
    • Ground-based Parallax Confirmed by Spitzer: Binary Microlensing Event MOA-2015-BLG-020 

      Wang T; Zhu W; Mao S; Bond IA; Gould A; Udalski A; Sumi T; Bozza V; Ranc C; Cassan A; Yee JC; Han C; Abe F; Asakura Y; Barry R; Bennett DP; Bhattacharya A; Donachie M; Evans P; Fukui A; Hirao Y; Itow Y; Kawasaki K; Koshimoto N; Li MCA; Ling CH; Masuda K; Matsubara Y; Miyazaki S; Muraki Y; Nagakane M; Ohnishi K; Rattenbury N; Saito T; Sharan A; Shibai H; Sullivan DJ; Suzuki D; Tristram PJ; Yamada T; Yonehara A; KozŁowski S; Mróz P; Pawlak M; Pietrukowicz P; Poleski R; Skowron J; Soszyński I; Szymański MK; Ulaczyk K; Beichman C; Bryden G; Calchi Novati S; Carey S; Fausnaugh M; Gaudi BS; Henderson CB; Shvartzvald Y; Wibking B; Albrow MD; Chung SJ; Hwang KH; Jung YK; Ryu YH; Shin IG; Cha SM; Kim DJ; Kim HW; Kim SL; Lee CU; Lee Y; Park BG; Pogge RW; Street RA; Tsapras Y; Hundertmark M; Bachelet E; Dominik M; Horne K; Jaimes RF; Wambsganss J; Bramich DM; Schmidt R (2017)
      © 2017. The American Astronomical Society. All rights reserved.. We present the analysis of the binary gravitational microlensing event MOA-2015-BLG-020. The event has a fairly long timescale (∼63 days) and thus the light ...
    • MOA-2015-BLG-337: A Planetary System with a Low-mass Brown Dwarf/Planetary Boundary Host, or a Brown Dwarf Binary 

      Miyazaki S; Sumi T; Bennett DP; Gould A; Udalski A; Bond IA; Koshimoto N; Nagakane M; Rattenbury N; Abe F; Bhattacharya A; Barry R; Donachie M; Fukui A; Hirao Y; Itow Y; Kawasaki K; Li MC; Ling CH; Matsubara Y; Matsuo T; Muraki Y; Ohnishi K; Ranc C; Saito T; Sharan A; Shibai H; Suematsu H; Suzuki D; Sullivan DJ; Tristram PJ; Yamada T; Yonehara A; owski S; Mr'oz P; Pawlak M; Poleski R; Pietrukowicz P; Skowron J; Soszy'nski I; Szyma'nski MK; Ulaczyk K; Albrow MD; Chung S-J; Han C; Jung YK; Hwang K-H; Ryu Y-H; Shin I-G; Shvartzvald Y; Yee JC; Zang W; Zhu W; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW (2018)
      We report the discovery and the analysis of the short timescale binary-lens microlensing event, MOA-2015-BLG-337. The lens system could be a planetary system with a very low mass host, around the brown dwarf/planetary ...
    • OGLE-2015-BLG-1459L: The Challenges of Exo-Moon Microlensing 

      Hwang K-H; Udalski A; Bond IA; Albrow MD; Chung S-J; Gould A; Han C; Jung YK; Ryu Y-H; Shin I-G; Yee JC; Zhu W; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW; Pawlak M; Poleski R; Szymański MK; Skowron J; Soszyński I; Mróz P; Kozłowski S; Pietrukowicz P; Ulaczyk K; Abe F; Asakura Y; Barry R; Bennett DP; Bhattacharya A; Donachie M; Evans P; Fukui A; Hirao Y; Itow Y; Kawasaki K; Koshimoto N; Li MCA; Ling CH; Masuda K; Matsubara Y; Miyazaki S; Muraki Y; Nagakane M; Ohnishi K; Ranc C; Rattenbury NJ; Saito T; Sharan A; Sullivan DJ; Sumi T; Suzuki D; Tristram PJ; Yamada T; Yamada T; Yonehara A (2017)
      We show that dense OGLE and KMTNet $I$-band survey data require four bodies (sources plus lenses) to explain the microlensing light curve of OGLE-2015-BLG-1459. However, these can equally well consist of three lenses ...
    • OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Microlens Parallax Effect from Space-based Observations 

      Shin IG; Udalski A; Yee JC; Novati SC; Han C; Skowron J; Mróz P; Soszyński I; Poleski R; Szymański MK; Kozłowski S; Pietrukowicz P; Ulaczyk K; Pawlak M; Albrow MD; Gould A; Chung SJ; Hwang KH; Jung YK; Ryu YH; Zhu W; Cha SM; Kim DJ; Kim HW; Kim SL; Lee CU; Lee Y; Park BG; Pogge RW; Beichman C; Bryden G; Carey S; Gaudi BS; Henderson CB; Shvartzvald Y (2017)
      © 2017. The American Astronomical Society. All rights reserved.. The microlens parallax is a crucial observable for conclusively identifying the nature of lens systems in microlensing events containing or composed of faint ...
    • OGLE-2016-BLG-0263Lb: Microlensing Detection of a Very Low-mass Binary Companion through a Repeating Event Channel 

      Han C; Udalski A; Gould A; Bond IA; Albrow MD; Chung SJ; Jung YK; Ryu YH; Shin IG; Yee JC; Zhu W; Cha SM; Kim SL; Kim DJ; Lee CU; Lee Y; Park BG; Skowron J; Mróz P; Pietrukowicz P; Kozłowski S; Poleski R; Szymański MK; Soszyński I; Ulaczyk K; Pawlak M; Abe F; Asakura Y; Barry R; Bennett DP; Bhattacharya A; Donachie M; Evans P; Fukui A; Hirao Y; Itow Y; Koshimoto N; Li MCA; Ling CH; Masuda K; Matsubara Y; Muraki Y; Nagakane M; Ohnishi K; Ranc C; Rattenbury NJ; Saito T; Sharan A; Sullivan DJ; Sumi T; Suzuki D; Tristram PJ; Yamada T; Yamada T; Yonehara A (2017)
      © 2017. The American Astronomical Society. All rights reserved. We report the discovery of a planet-mass companion to the microlens OGLE-2016-BLG-0263L. Unlike most lowmass companions that were detected through perturbations ...
    • OGLE-2016-BLG-0613LABb: A Microlensing Planet in a Binary System 

      Han C; Udalski A; Gould A; Lee CU; Shvartzvald Y; Zang WC; Mao S; Kozłowski S; Albrow MD; Chung SJ; Hwang KH; Jung YK; Kim D; Kim HW; Ryu YH; Shin IG; Yee JC; Zhu W; Cha SM; Kim SL; Kim DJ; Lee Y; Park BG; Skowron J; Mróz P; Pietrukowicz P; Poleski R; Szymański MK; Soszyński I; Ulaczyk K; Pawlak M; Beichman C; Bryden G; Novati SC; Gaudi BS; Henderson CB; Howell SB; Jacklin S; Penny MT; Fouqué P; Wang TS (2017)
      © 2017. The American Astronomical Society. All rights reserved.. 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 ...
    • OGLE-2016-BLG-0693LB: Probing the brown dwarf desert with microlensing 

      Ryu YH; Udalski A; Yee JC; Albrow MD; Chung SJ; Gould A; Han C; Hwang KH; Jung YK; Shin IG; Zhu W; Cha SM; Kim DJ; Kim HW; Kim SL; Lee CU; Lee Y; Park BG; Pogge RW; Pietrukowicz P; Kozłowski S; Poleski R; Skowron J; Mróz P; Szymański MK; Soszyński I; Pawlak M; Ulaczyk K (2017)
      © 2017. The American Astronomical Society. All rights reserved. We present an analysis of microlensing event OGLE-2016-BLG-0693, based on the survey-only microlensing observations by the OGLE and KMTNet groups. In order ...
    • OGLE-2016-BLG-1003: First Resolved Caustic-crossing Binary-source Event Discovered by Second-generation Microlensing Surveys 

      Jung YK; Udalski A; Bond IA; Yee JC; Gould A; Han C; Albrow MD; Lee CU; Kim SL; Hwang KH; Chung SJ; Ryu YH; Shin IG; Zhu W; Cha SM; Kim DJ; Lee Y; Park BG; Kim HW; Pogge RW; Skowron J; Szymański MK; Poleski R; Mróz P; Kozłowski S; Pietrukowicz P; Soszyński I; Ulaczyk K; Pawlak M; Abe F; Bennett DP; Barry R; Sumi T; Asakura Y; Bhattacharya A; Donachie M; Fukui A; Hirao Y; Itow Y; Koshimoto N; Li MCA; Ling CH; Masuda K; Matsubara Y; Muraki Y; Nagakane M; Rattenbury NJ; Evans P; Sharan A; Sullivan DJ; Suzuki D; Tristram PJ; Yamada T; Yamada T; Yonehara A (2017)
      We report the analysis of the first resolved caustic-crossing binary-source microlensing event OGLE-2016-BLG-1003. The event is densely covered by the round-the-clock observations of three surveys. The light curve is ...
    • OGLE-2016-BLG-1045: A Test of Cheap Space-Based Microlens Parallaxes 

      Shin I-G; Udalski A; Yee JC; Novati SC; Christie G; Poleski R; Mróz P; Skowron J; Szymański MK; Soszyński I; Pietrukowicz P; Kozłowski S; Ulaczyk K; Pawlak M; Natusch T; Pogge RW; Gould A; Han C; Albrow MD; Chung S-J; Hwang K-H; Ryu Y-H; Jung YK; Zhu W; Lee C-U; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee Y; Lee D-J; Park B-G; Beichman C; Bryden G; Carey S; Gaudi BS; Henderson CB; Shvartzvald Y (2018)
      Microlensing is a powerful and unique technique to probe isolated objects in the Galaxy. To study the characteristics of these interesting objects based on the microlensing method, measurement of the microlens parallax ...
    • OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary 

      Ryu Y-H; Yee JC; Udalski A; Bond IA; Shvartzvald Y; Zang W; Jaimes RF; Jorgensen UG; Zhu W; Huang CX; Jung YK; Albrow MD; Chung S-J; Gould A; Han C; Hwang K-H; Shin I-G; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW; Novati SC; Carey S; Henderson CB; Beichman C; Gaudi BS; Mróz P; Poleski R; Skowron J; Szymanski MK; Soszynski I; Kozlowski S; Pietrukowicz P; Ulaczyk K; Pawlak M; Abe F; Asakura Y; Barry R; Bennett DP; Bhattacharya A; Donachie M; Evans P; Fukui A; Hirao Y; Itow Y; Kawasaki K; Koshimoto N; Li MCA; Ling CH; Masuda K; Matsubara Y; Miyazaki S; Muraki Y; Nagakane M; Ohnishi K; Ranc C; Rattenbury NJ; Saito T; Sharan A; Sullivan DJ; Sumi T; Suzuki D; Tristram PJ; Yamada T; Yamada T; Yonehara A; Bryden G; Howell SB; Jacklin S; Penny MT; Mao S; Fouque P; Wang T; Street RA; Tsapras Y; Hundertmark M; Bachelet E; Dominik M; Li Z; Cross S; Cassan A; Horne K; Schmidt R; Wambsganss J; Ment SK; Maoz D; Snodgrass C; Steele IA; Bozza V; Burgdorf MJ; Ciceri S; D'Ago G; Evans DF; Hinse TC; Kerins E; Kokotanekova R; Longa P; MacKenzie J; Popovas A; Rabus M; Rahvar S; Sejadian S; Skottfelt J; Southworth J; Essen CV (2017)
      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 ...
    • OGLE-2016-BLG-1266: A Probable Brown-Dwarf/Planet Binary at the Deuterium Fusion Limit 

      Albrow MD; Yee JC; Udalski A; Novati SC; Carey S; Henderson CB; Beichman C; Bryden G; Gaudi BS; Shvartzvald Y; Szymanśki MK; Mroź P; Skowron J; Poleski R; Soszynśki I; Kozlowski S; Pietrukowicz; Ulaczyk K; Pawlak M; Chung S-J; Gould A; Han C; Hwang K-H; Jung YK; Ryu Y-H; Shin I-G; Zhu W; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW (2018)
      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 ...
    • OGLE-2016-BLG-1469L: Microlensing Binary Composed of Brown Dwarfs 

      Han C; Udalski A; Sumi T; Gould A; Albrow MD; Chung SJ; Jung YK; Ryu YH; Shin IG; Yee JC; Zhu W; Cha SM; Kim SL; Kim DJ; Lee CU; Lee Y; Park BG; Soszyński I; Mróz P; Pietrukowicz P; Szymański MK; Skowron J; Poleski R; Kozłowski S; Ulaczyk K; Pawlak M; Abe F; Asakura Y; Bennett DP; Bond IA; Bhattacharya A; Donachie M; Freeman M; Fukui A; Hirao Y; Itow Y; Koshimoto N; Li MCA; Ling CH; Masuda K; Matsubara Y; Muraki Y; Nagakane M; Ohnishi K; Oyokawa H; Rattenbury NJ; Saito T; Sharan A; Sullivan DJ; Suzuki D; Tristram PJ; Yamada T; Yamada T; Yonehara A; Barry R (2017)
      © 2017. The American Astronomical Society. All rights reserved. We report the discovery of a binary composed of two brown dwarfs, based on the analysis of the microlensing event OGLE-2016-BLG-1469. Thanks to the detection ...
    • OGLE-2017-BLG-0039: Microlensing Event with Light from a Lens Identified from Mass Measurement 

      Han C; Jung YK; Udalski A; Bond I; Bozza V; Albrow MD; Chung SJ; Gould A; Hwang KH; Kim D; Lee CU; Kim HW; Ryu YH; Shin IG; Yee JC; Shvartzvald Y; Cha SM; Kim SL; Kim DJ; Lee DJ; Lee Y; Park BG; Pogge RW; Szymański MK; Mróz P; Skowron J; Poleski R; Soszyński I; Kozłowski S; Pietrukowicz P; Ulaczyk K; Pawlak M; Abe F; Barry R; Bennett DP; Bhattacharya A; Donachie M; Evans P; Fukui A; Hirao Y; Itow Y; Kawasaki K; Koshimoto N; Li MCA; Ling CH; Matsubara Y; Miyazaki S; Munakata H; Muraki Y; Nagakane M; Ohnishi K; Ranc C; Rattenbury N; Saito T; Sharan A; Sullivan DJ; Sumi T; Suzuki D; Tristram PJ; Yamada T; Yonehara A (2018)
      © 2018. The American Astronomical Society. All rights reserved. We present an analysis of the caustic-crossing binary microlensing event OGLE-2017-BLG-0039. Thanks to the very long duration of the event, with a time scale ...
    • OGLE-2017-BLG-0173Lb: Low-mass-ratio Planet in a "Hollywood" Microlensing Event 

      Hwang K-H; Udalski A; Shvartzvald Y; Ryu Y-H; Albrow MD; Chung S-J; Gould A; Han C; Jung YK; Shin I-G; Yee JC; Zhu W; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW; Skowron J; Mroz P; Poleski R; Kozlowski S; Soszynski I; Pietrukowicz P; Szymanski MK; Ulaczyk K; Pawlak M; Bryden G; Beichman C; Novati SC; Gaudi BS; Henderson CB; Jacklin S; Penny MT; Collaboration K; Collaboration OGLE; Team UKIRTM (2018)
      We present microlensing planet OGLE-2017-BLG-0173Lb, with planet-host mass ratio either $q\simeq 2.5\times 10^{-5}$ or $q\simeq 6.5\times 10^{-5}$, the lowest or among the lowest ever detected. The planetary perturbation ...
    • OGLE-2017-BLG-0329L: A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations 

      Han C; Novati SC; Udalski A; Lee C-U; Gould A; Bozza V; Mróz P; Pietrukowicz P; Skowron J; Szymański MK; Poleski R; Soszyński I; Kozłowski S; Ulaczyk K; Pawlak M; Rybicki K; Iwanek P; Albrow MD; Chung S-J; Hwang K-H; Jung YK; Ryu Y-H; Shin I-G; Shvartzvald Y; Yee JC; Zang W; Zhu W; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee D-J; Lee Y; Park B-G; Pogge RW; Kim W-T; Beichman C; Bryden G; Carey S; Gaudi BS; Henderson CB; Dominik M; Helling C; Hundertmark M; Jørgensen UG; Longa-Peña P; Lowry S; Sajadian S; Burgdorf MJ; Campbell-White J; Ciceri S; Evans DF; Haikala LK; Hinse TC; Rahvar S; Rabus M; Snodgrass C (2018)
      Mass measurements of gravitational microlenses require one to determine the microlens parallax PIe, but precise PIe measurement, in many cases, is hampered due to the subtlety of the microlens-parallax signal combined ...
    • OGLE-2017-BLG-0373Lb: A Jovian Mass-Ratio Planet Exposes A New Accidental Microlensing Degeneracy 

      Skowron J; Ryu Y-H; Hwang K-H; Udalski A; Mróz P; Kozłowski S; Soszyński I; Pietrukowicz P; Szymański MK; Poleski R; Ulaczyk K; Pawlak M; Rybicki K; Iwanek P; Albrow MD; Chung S-J; Gould A; Han C; Jung YK; Shin I-G; Shvartzvald Y; Yee JC; Zang W; Zhu RW; Cha S-M; Kim D-J; Kim H-W; Kim S-L; Lee C-U; Lee D-J; Lee Y; Park B-G; Pogge RW (2018)
      We report the discovery of microlensing planet OGLE-2017-BLG-0373Lb. We show that while the planet-host system has an unambiguous microlens topology, there are two geometries within this topology that fit the data equally ...
    • OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Star 

      Han C; Hirao Y; Udalski A; Lee CU; Bozza V; Gould A; Abe F; Barry R; Bond IA; Bennett DP; Bhattacharya A; Donachie M; Evans P; Fukui A; Itow Y; Kawasaki K; Koshimoto N; Li MCA; Ling CH; Matsubara Y; Miyazaki S; Munakata H; Muraki Y; Nagakane M; Ohnishi K; Ranc C; Rattenbury N; Saito T; Sharan A; Sullivan DJ; Sumi T; Suzuki D; Tristram PJ; Yamada T; Yonehara A; Mróz P; Poleski R; Kozłowski S; Soszyński I; Pietrukowicz P; Skowron J; Szymański MK; Ulaczyk K; Pawlak M; Rybicki K; Iwanek P; Albrow MD; Chung SJ; Hwang KH; Jung YK; Kim D; Kim WT; Kim HW; Ryu YH; Shin IG; Shvartzvald Y; Yee JC; Zhu W; Cha SM; Kim SL; Kim DJ; Lee DJ; Lee Y; Park BG; Pogge RW (2018)
      © 2018. The American Astronomical Society. All rights reserved. We report the discovery of a planetary system in which a super-Earth orbits a late M-dwarf host. The planetary system was found from the analysis of the ...
    • OGLE-2017-BLG-0537: A Microlensing Event with a Resolvable Lens in ≲5 years from High-resolution Follow-up Observations 

      Jung YK; Han C; Udalski A; Gould A; Albrow MD; Chung SJ; Hwang KH; Lee CU; Ryu YH; Shin IG; Shvartzvald Y; Yee JC; Zang W; Zhu W; Cha SM; Kim DJ; Kim HW; Kim SL; Lee DJ; Lee Y; Park BG; Pogge RW; Kim WT; Mróz P; Poleski R; Skowron J; Szymański MK; Soszyński I; Kozłowski S; Pietrukowicz P; Ulaczyk K; Pawlak M (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 ...