相关论文: The OGLE-II event sc5_2859 -- An example of disk-d…

A Machine Learning Classifier for Microlensing in Wide-Field Surveys

While microlensing is very rare, occurring on average once per million stars observed, current and near-future surveys are coming online with the capability of providing photometry of almost the entire visible sky to depths up to R ~ 22 mag…

天体物理仪器与方法 · 物理学 2020-04-30 D. Godines , E. Bachelet , G. Narayan , R. A. Street

Confirmation of the OGLE-2005-BLG-169 planet signature and characteristics with lens-source proper motion detection

We present Keck NIRC2 high angular resolution adaptive optics observations of the microlensing event OGLE-2005-BLG-169, taken 8.21 years after the discovery of this planetary system. For the first time for a microlensing planetary event,…

地球与行星天体物理 · 物理学 2015-08-03 V. Batista , J. -P. Beaulieu , D. P. Bennett , A. Gould , J. -B. Marquette , A. Fukui , A. Bhattacharya

Spitzer Microlens Measurement of a Massive Remnant in a Well-Separated Binary

We report the detection and mass measurement of a binary lens OGLE-2015-BLG-1285La,b, with the more massive component having $M_1>1.35\,M_\odot$ (80% probability). A main-sequence star in this mass range is ruled out by limits on blue…

太阳与恒星天体物理 · 物理学 2015-12-22 Y. Shvartzvald , A. Udalski , A. Gould , C. Han , V. Bozza , M. Friedmann , M. Hundertmark , C. Beichman , G. Bryden , S. Calchi Novati , S. Carey , M. Fausnaugh , B. S. Gaudi , C. B. Henderson , T. Kerr , R. W. Pogge , W. Varricatt , B. Wibking , J. C. Yee , W. Zhu , R. Poleski , M. Pawlak , M. K. Szymański , J. Skowron , P. Mróz , S. Kozłowski , Ł. Wyrzykowski , P. Pietrukowicz , G. Pietrzyński , I. Soszyński , K. Ulaczyk , J. -Y. Choi , H. Park , Y. K. Jung , I. -G. Shin , M. D. Albrow , B. -G. Park , S. -L. Kim , C. -U. Lee , S. -M. Cha , D. -J. Kim , Y. Lee , D. Maoz , S. Kaspi , R. A. Street , Y. Tsapras , E. Bachelet , M. Dominik , D. M. Bramich , Keith Horne , C. Snodgrass , I. A. Steele , J. Menzies , R. Figuera Jaimes , J. Wambsganss , R. Schmidt , A. Cassan , C. Ranc , S. Mao , Subo Dong , G. D'Ago , G. Scarpetta , P. Verma , U. G. Jørgensen , E. Kerins , J. Skottfelt

OGLE-II High Proper Motion Stars towards the Galactic centre

The photometry data base of the second phase of the OGLE microlensing experiment, OGLE-II, is a rich source of information about the kinematics and structure of the Galaxy. In this work we use the OGLE-II proper motion catalogue to identify…

天体物理学 · 物理学 2009-11-13 Nicholas J. Rattenbury , Shude Mao

A Search for Stellar-Mass Black Holes via Astrometric Microlensing

While dozens of stellar mass black holes have been discovered in binary systems, isolated black holes have eluded detection. Their presence can be inferred when they lens light from a background star. We attempt to detect the astrometric…

太阳与恒星天体物理 · 物理学 2016-10-19 J. R. Lu , E. Sinukoff , E. O. Ofek , A. Udalski , S. Kozlowski

Microlensing Optical Depth towards the Galactic Bulge Using Clump Giants from the MACHO Survey

Using 7 years of MACHO survey data, we present a new determination of the optical depth to microlensing towards the Galactic bulge. We select the sample of 62 microlensing events (60 unique) on clump giant sources and perform a detailed…

天体物理学 · 物理学 2009-11-10 P. Popowski , K. Griest , C. L. Thomas , K. H. Cook , D. P. Bennett , A. C. Becker , D. R. Alves , D. Minniti , A. J. Drake , C. Alcock , R. A. Allsman , T. S. Axelrod , K. C. Freeman , M. Geha , M. J. Lehner , S. L. Marshall , C. A. Nelson , B. A. Peterson , P. J. Quinn , C. W. Stubbs , W. Sutherland , T. Vandehei , D. Welch

On the accuracy of mass measurement for microlensing black holes as seen by Gaia and OGLE

We investigate the impact of combining Gaia astrometry from space with precise, high cadence OGLE photometry from the ground. For the archival event OGLE3-ULENS-PAR-02, which is likely a black hole, we simulate a realistic astrometric…

太阳与恒星天体物理 · 物理学 2018-03-14 Krzysztof A. Rybicki , Łukasz Wyrzykowski , Jakub Klencki , Jos de Bruijne , Krzysztof Belczyński , Martyna Chruślińska

Interpreting the candidate Galactic microlensing events

Four microlensing collaborations are presently searching for compact matter in the Galaxy and all have detected possible candidates. Using the detection efficiencies recently published by the MACHO and OGLE collaborations, we present…

天体物理学 · 物理学 2015-06-24 Eamonn J. Kerins

A Giant Planet beyond the Snow Line in Microlensing Event OGLE-2011-BLG-0251

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

Microlensing constraints on the Galactic Bulge Initial Mass Function

Aims. We seek to probe the Galactic bulge IMF starting from microlensing observations. Methods. We analyse the recent results of the microlensing campaigns carried out towards the Galactic bulge presented by the EROS, MACHO and OGLE…

天体物理学 · 物理学 2009-06-23 S. Calchi Novati , F. De Luca , Ph. Jetzer , L. Mancini , G. Scarpetta

Modeling Transiting Circumstellar Disks: Characterizing the Newly Discovered Eclipsing Disk System OGLE LMC-ECL-11893

We investigate the nature of the unusual eclipsing star OGLE LMC-ECL-11893 (OGLE J05172127-6900558) in the Large Magellanic Cloud recently reported by Dong et al. 2014. The eclipse period for this star is 468 days, and the eclipses exhibit…

太阳与恒星天体物理 · 物理学 2015-06-23 Erin L. Scott , Eric E. Mamajek , Mark J. Pecaut , Alice C. Quillen , Fred Moolekamp , Cameron P. M. Bell

Microlensing Events in the Galactic Plane Using the Zwicky Transient Facility

Microlensing is a powerful technique to study the Galactic population of "dark" objects such as exoplanets both bound and unbound, brown dwarfs, low-luminosity stars, old white dwarfs, neutron stars, and almost the only way to study…

太阳与恒星天体物理 · 物理学 2022-03-30 Antonio C. Rodriguez , Przemek Mróz , Shrinivas R. Kulkarni , Igor Andreoni , Eric C. Bellm , Richard Dekany , Andrew J. Drake , Dmitry A. Duev , Frank J. Masci , Thomas A. Prince , Reed Riddle , David L. Shupe

VVV Survey Observations of a Microlensing Stellar Mass Black Hole Candidate in the Field of the Globular Cluster NGC 6553

We report the discovery of a large timescale candidate microlensing event of a bulge stellar source based on near-infrared observations with the VISTA Variables in the Via Lactea Survey (VVV). The new microlensing event is projected only…

太阳与恒星天体物理 · 物理学 2015-09-16 D. Minniti , R. Contreras Ramos , J. Alonso-Garcia , T. Anguita , M. Catelan , F. Gran , V. Motta , G. Muro , K. Rojas , R. K. Saito

OGLE-2009-BLG-023/MOA-2009-BLG-028: Characterization of a Binary Microlensing Event Based on Survey Data

We report the result of the analysis of the light curve of a caustic-crossing binary-lens microlensing event OGLE-2009-BLG-023/MOA-2009-BLG-028. Even though the event was observed solely by survey experiments, we could uniquely determine…

太阳与恒星天体物理 · 物理学 2015-05-28 K. -H. Hwang , C. Han , A. Udalski , T. Sumi , A. Gould , M. Jaroszynski , M. Kubiak , M. K. Szymanski , G. Pietrzynski , I. Soszynski , O. Szewczyk , K. Ulaczyk , L. Wyrzykowski , F. Abe , D. P. Bennett , I. A. Bond , C. S. Botzler , M. Freeman , A. Fukui , K. Furusawa , J. B. Hearnshaw , Y. Itow , K. Kamiya , P. M. Kilmartin , A. Korpela , W. Lin , C. H. Ling , K. Masuda , Y. Matsubara , N. Miyake , Y. Muraki , K. Ohnishi , Y. C. Perrott , N. J. Rattenbury , To. Saito , T. Sako , D. J. Sullivan , W. L. Sweatman , P. J. Tristram , P. C. M. Yock

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…

地球与行星天体物理 · 物理学 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

Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc

We present the photometric analysis of Gaia19bld, a high-magnification ($A\approx60$) microlensing event located in the southern Galactic plane, which exhibited finite source and microlensing parallax effects. Due to a prompt detection by…

星系天体物理 · 物理学 2022-01-05 K. A. Rybicki , Ł. Wyrzykowski , E. Bachelet , A. Cassan , P. Zieliński , A. Gould , S. Calchi Novati , J. C. Yee , Y. -H. Ryu , M. Gromadzki , P. Mikołajczyk , N. Ihanec , K. Kruszyńska , F. -J. Hambsch , S. Zoła , S. J. Fossey , S. Awiphan , N. Nakharutai , F. Lewis , F. Olivares E. , S. Hodgkin , A. Delgado , E. Breedt , D. L. Harrison , M. vanLeeuwen , G. Rixon , T. Wevers , A. Yoldas , A. Udalski , M. K. Szymański , I. Soszyński , P. Pietrukowicz , S. Kozłowski , J. Skowron , R. Poleski , K. Ulaczyk , P. Mróz , P. Iwanek , M. Wrona , R. A. Street , Y. Tsapras , M. Hundertmark , M. Dominik , C. Beichman , G. Bryden , S. Carey , B. S. Gaudi , C. Henderson , Y. Shvartzvald , W. Zang , W. Zhu , G. W. Christie , J. Green , S. Hennerley , J. McCormick , L. A. G. Monard , T. Natusch , R. W. Pogge , I. Gezer , A. Gurgul , Z. Kaczmarek , M. Konacki , M. C. Lam , M. Maskoliunas , E. Pakstiene , M. Ratajczak , A. Stankeviciute , J. Zdanavicius , O. Ziółkowska

Limits on Stellar and Planetary Companions in Microlensing Event OGLE-1998-BUL-14

We present the PLANET photometric data set for \ob14, a high magnification ($A_{\rm max}\sim 16$) event alerted by the OGLE collaboration toward the Galactic bulge in 1998. The PLANET data set consists a total of 461 I-band and 139 $V-$band…

天体物理学 · 物理学 2009-10-31 M. D. Albrow , J. -P. Beaulieu , J. A. R. Caldwell , D. L. DePoy , M. Dominik , B. S. Gaudi , A. Gould , J. Greenhill , K. Hill , S. Kane , R. Martin , J. Menzies , R. M. Naber , R. W. Pogge , K. R. Pollard , P. D. Sackett , K. C. Sahu , P. Vermaak , R. Watson , A. Williams

The OGLE View of Microlensing towards the Magellanic Clouds. III. Ruling out sub-solar MACHOs with the OGLE-III LMC data

In the third part of the series presenting the Optical Gravitational Lensing Experiment (OGLE) microlensing studies of the dark matter halo compact objects (MACHOs) we describe results of the OGLE-III monitoring of the Large Magellanic…

星系天体物理 · 物理学 2015-05-20 L. Wyrzykowski , S. Kozlowski , J. Skowron , A. Udalski , M. K. Szymanski , M. Kubiak , G. Pietrzynski , I. Soszynski , O. Szewczyk , K. Ulaczyk , R. Poleski

Astrometric Microlensing of Distant Sources due to the Stars in the Galaxy

We investigate properties of astrometric microlensing of distant sources (such as QSOs and radio galaxies) caused by stars in the Galaxy, mainly focusing on application to the VERA (VLBI Exploration of Radio Astrometry) project. Assuming…

天体物理学 · 物理学 2009-11-07 Mareki Honma , Tomoharu Kurayama

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

We present high resolution follow-up data of the planetary microlensing event MOA-2010-BLG-328, using Keck and the Hubble. Keck data, taken 8 years after the event, reveal a strong lens detection enabling a direct measurement of lens flux…

地球与行星天体物理 · 物理学 2025-11-14 Aikaterini Vandorou , David P. Bennett , Jean-Philippe Beaulieu , Aparna Bhattacharya , Joshua W. Blackman , Andrew A. Cole , Naoki Koshimoto , Clément Ranc , Natalia E. Rektsini , Sean K. Terry