Related papers: Repeating microlensing events in the OGLE data

The first radial velocity measurements of a microlensing event: no evidence for the predicted binary

The gravitational microlensing technique allows the discovery of exoplanets around stars distributed in the disk of the galaxy towards the bulge. However, the alignment of two stars that led to the discovery is unique over the timescale of…

Earth and Planetary Astrophysics · Physics 2015-12-09 I. Boisse , A. Santerne , J. -P. Beaulieu , W. Fakhardji , N. C. Santos , P. Figueira , S. G. Sousa , C. Ranc

The MACHO Project: 45 Candidate Microlensing Events from the First Year Galactic Bulge Data

We report the detection of 45 candidate microlensing events in fields toward the Galactic bulge. These come from the analysis of 24 fields containing 12.6 million stars observed for 190 days in 1993. Many of these events are of extremely…

Astrophysics · Physics 2009-10-28 C. Alcock , R. A. Allsman , T. S. Axelrod , D. P. Bennett , K. H. Cook , K. C. Freeman , K. Griest , J. Guern , M. J. Lehner , S. L. Marshall , H. -S. Park , S. Perlmutter , B. A. Peterson , M. R. Pratt , P. J. Quinn , A. W. Rodgers , C. W. Stubbs , W. Sutherland

Parallax Microlensing Events in the OGLE II Database Toward the Galactic Bulge

We present a systematic search for parallax microlensing events among a total of 512 microlensing candidates in the OGLE II database for the 1997-1999 seasons. We fit each microlensing candidate with both the standard microlensing model and…

Astrophysics · Physics 2009-11-07 M. C. Smith , S. Mao , P. R. Wozniak

OGLE-2017-BLG-0537: Microlensing Event with a Resolvable Lens in $\lesssim 5$ years from High-resolution Follow-up Observations

We present the analysis of the binary-lens microlensing event OGLE-2017-BLG-0537. The light curve of the event exhibits two strong caustic-crossing spikes among which the second caustic crossing was resolved by high-cadence surveys. It is…

Solar and Stellar Astrophysics · Physics 2018-08-15 Y. K. Jung , C. Han , A. Udalski , A. Gould , M. D. Albrow , S. -J. Chung , K. -H. Hwang , C. -U. Lee , Y. -H. Ryu , I. -G. Shin , Y. Shvartzvald , J. C. Yee , W. Zang , W. Zhu , S. -M. Cha , D. -J. Kim , H. -W. Kim , S. -L. Kim , D. -J. Lee , Y. Lee , B. -G. Park , R. W. Pogge , W. -T. Kim , P. Mróz , R. Poleski , J. Skowron , M. K. Szymański , I. Soszyński , S. Kozłowski , P. Pietrukowicz , K. Ulaczyk , M. Pawlak

Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of A Long-term Asymmetric Perturbation

In the process of analyzing an observed light curve, one often confronts various scenarios that can mimic the planetary signals causing difficulties in the accurate interpretation of the lens system. In this paper, we present the analysis…

Solar and Stellar Astrophysics · Physics 2017-03-08 Y. K. Jung , A. Udalski , J. C. Yee , T. Sumi , A. Gould , C. Han , M. D. Albrow , C. -U. Lee , S. -L. Kim , S. -J. Chung , K. -H. Hwang , Y. -H. Ryu , I. -G. Shin , W. Zhu , S. -M. Cha , D. -J. Kim , Y. Lee , B. -G. Park , R. W. Pogge , P. Pietrukowicz , S. Kozlowski , R. Poleski , J. Skowron , P. Mroz , M. K. Szymanski , I. Soszynski , M. Pawlak , K. Ulaczyk , F. Abe , D. P. Bennett , R. Barry , I. A. Bond , Y. Asakura , A. Bhattacharya , M. Donachie , M. Freeman , A. Fukui , Y. Hirao , Y. Itow , N. Koshimoto , M. C. A. Li , C. H. Ling , K. Masuda , Y. Matsubara , Y. Muraki , M. Nagakane , H. Oyokawa , A. Sharan , D. J. Sullivan , D. Suzuki , P. J. Tristram , T. Yamada , T. Yamada , A. Yonehara

Interpretation of Strong Short-Term Central Perturbations in the Light Curves of Moderate-Magnification Microlensing Events

To improve the planet detection efficiency, current planetary microlensing experiments are focused on high-magnification events searching for planetary signals near the peak of lensing light curves. However, it is known that central…

Earth and Planetary Astrophysics · Physics 2015-05-14 C. Han , K. -H. Hwang , D. Kim , A. Udalski , F. Abe , L. A. B. Monard , J. McCormick , M. K. Szymanski , M. Kubiak , G. Pietrzynski , I. Soszynski , O. Szewczyk , L. Wyrzykowski , K. Ulaczyk , I. A. Bond , C. S. Botzler , 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 , M. Nagaya , K. Ohnishi , T. Tokumura , Y. C. Perrott , N. Rattenbury , To. Saito , T. Sako , L. Skuljan , D. S. Sullivan , T. Sumi , W. L. Sweatman , P. J. Tristram , P. C. M. Yock , W. Allen , G. W. Christie , D. L. DePoy , S. Dong , B. S. Gaudi , A. Gould , C. -U. Lee , T. Natusch , B. -G. Park , R. W. Pogge , M. D. Albrow , A. Allan , V. Batista , J. P. Beaulieu , D. P. Bennett , S. Brillant , M. Bode , D. M. Bramich , M. Burgdorf , J. A. R. Caldwell , H. Calitz , A. Cassan , E. Corrales , S. Dieters , D. D. Prester , M. Dominik , J. Donatowicz , P. Fouque , J. Greenhill , K. Hill , M. Hoffman , K. Horne , U. G. Jorgensen , N. Kains , D. Kubas , J. B. Marquette , R. Martin , P. Meintjes , J. Menzies , K. R. Pollard , K. C. Sahu , C. Snodgrass , I. Steele , R. Street , Y. Tsapras , J. Wambsganss , A. Williams , M. Zub

Large Magellanic Cloud Microlensing Optical Depth with Imperfect Event Selection

I present a new analysis of the MACHO Project 5.7 year Large Magellanic Cloud (LMC) microlensing data set that incorporates the effects of contamination of the microlensing event sample by variable stars. Photometric monitoring of MACHO LMC…

Astrophysics · Physics 2009-11-10 David P. Bennett

Candidate Gravitational Microlensing Events for Future Direct Lens Imaging

The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the…

Solar and Stellar Astrophysics · Physics 2015-06-19 C. B. Henderson , H. Park , T. Sumi , A. Udalski , A. Gould , Y. Tsapras , C. Han , B. S. Gaudi , V. Bozza , F. Abe , D. P. Bennett , I. A. Bond , C. S. Botzler , M. Freeman , A. Fukui , D. Fukunaga , Y. Itow , N. Koshimoto , C. H. Ling , K. Masuda , Y. Matsubara , Y. Muraki , S. Namba , K. Ohnishi , N. J. Rattenbury , To. Saito , D. J. Sullivan , D. Suzuki , W. L. Sweatman , P. J. Tristram , N. Tsurumi , K. Wada , N. Yamai , P. C. M. Yock , A. Yonehara , M. K. Szymański , M. Kubiak , G. Pietrzyński , I. Soszyński , J. Skowron , S. Kozłowski , R. Poleski , K. Ulaczyk , Ł. Wyrzykowski , P. Pietrukowicz , L. A. Almeida , M. Bos , J. -Y. Choi , G. W. Christie , D. L. Depoy , Subo Dong , M. Friedmann , K. -H. Hwang , F. Jablonski , Y. K. Jung , S. Kaspi , C. -U. Lee , D. Maoz , J. McCormick , D. Moorhouse , T. Natusch , H. Ngan , R. W. Pogge , I. -G. Shin , Y. Shvartzvald , T. -G. Tan , G. Thornley , J. C. Yee , A. Allan , D. M. Bramich , P. Browne , M. Dominik , K. Horne , M. Hundertmark , R. Figuera Jaimes , N. Kains , C. Snodgrass , I. A. Steele , R. A. Street

OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event

We present observations of the unusual microlensing event OGLE 2003-BLG-235/MOA 2003-BLG-53. In this event a short duration (~7 days) low amplitude deviation in the light curve due a single lens profile was observed in both the MOA and OGLE…

Astrophysics · Physics 2009-11-10 I. A. Bond , A. Udalski , M. Jaroszynski , N. J. Rattenbury , B. Paczynski , I. Soszynski , L. Wyrzykowski , M. K. Szymanski , M. Kubiak , O. Szewczyk , K. Zebrun , G. Pietrzynski , F. Abe , D. P. Bennett , S. Eguchi , Y. Furuta , J. B. Hearnshaw , K. Kamiya , P. M. Kilmartin , Y. Kurata , K. Masuda , Y. Matsubara , Y. Muraki , S. Noda , K. Okajima , T. Sako , T. Sekiguchi , D. J. Sullivan , T. Sumi , P. J. Tristram , T. Yanagisawa , P. C. M. Yock

Search for Extra-Solar Planets Through Monitoring Microlensing Events from Antarctica

During the months when the galactic bulge is visible from the southern hemisphere, there are typically about 8 to 10 on-going microlensing events at any given time. If the lensing stars have planets around them, then the signature of the…

Astrophysics · Physics 2007-05-23 Kailash C. Sahu

OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source?

(abridged) Using the particularly long gravitational microlensing event OGLE-2014-BLG-1186 with a time-scale $t_\mathrm{E}$ ~ 300 d, we present a methodology for identifying the nature of localised deviations from single-lens point-source…

Earth and Planetary Astrophysics · Physics 2019-02-27 M. Dominik , E. Bachelet , V. Bozza , R. A. Street , C. Han , M. Hundertmark , A. Udalski , D. M. Bramich , K. A. Alsubai , S. Calchi Novati , S. Ciceri , G. D'Ago , R. Figuera Jaimes , T. Haugbølle , T. C. Hinse , K. Horne , U. G. Jørgensen , D. Juncher , N. Kains , H. Korhonen , L. Mancini , J. Menzies , A. Popovas , M. Rabus , S. Rahvar , G. Scarpetta , R. Schmidt , J. Skottfelt , C. Snodgrass , J. Southworth , D. Starkey , I. A. Steele , J. Surdej , Y. Tsapras , J. Wambsganss , O. Wertz , P. Pietrukowicz , M. K. Szymański , P. Mróz , J. Skowron , I. Soszyński , K. Ulaczyk , R. Poleski

Microlensing optical depth towards the Galactic bulge from MOA observations during 2000 with Difference Image Analysis

We analyze the data of the gravitational microlensing survey carried out by by the MOA group during 2000 towards the Galactic Bulge (GB). Our observations are designed to detect efficiently high magnification events with faint source stars…

Astrophysics · Physics 2009-11-07 T. Sumi , F. Abe , I. A. Bond , R. J. Dodd , J. B. Hearnshaw , M. Honda , M. Honma , Y. Kan-ya , P. M. Kilmartin , K. Masuda , Y. Matsubara , Y. Muraki , T. Nakamura , R. Nishi , S. Noda , K. Ohnishi , O. K. L. Petterson , N. J. Rattenbury , M. Reid , To. Saito , Y. Saito , H. Sato , M. Sekiguchi , J. Skuljan , D. J. Sullivan , M. Takeuti , P. J. Tristram , S. Wilkinson , T. Yanagisawa , P. C. M. Yock

OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Micorlens Parallax Effect from Space-based Observation

The microlens parallax is a crucial observable for conclusively identifying the nature of lens systems in microlensing events containing or composed of faint (even dark) astronomical objects such as planets, neutron stars, brown dwarfs, and…

Solar and Stellar Astrophysics · Physics 2017-10-11 I. -G. Shin , A. Udalski , J. C. Yee , S. Calchi Novati , C. Han , J. Skowron , P. Mróz , I. Soszyński , R. Poleski , M. K. Szymański , S. Kozłowski , P. Pietrukowicz , K. Ulaczyk , M. Pawlak , M. D. Albrow , A. Gould , S. -J. Chung , K. -H. Hwang , Y. K. Jung , Y. -H. Ryu , W. Zhu , S. -M. Cha , D. -J. Kim , H. -W. Kim , S. -L. Kim , C. -U. Lee , Y. Lee , B. -G. Park , R. W. Pogge , C. Beichman , G. Bryden , S. Carey , B. S. Gaudi , C. B. Henderson , Y. Shvartzvald

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

Binary Lenses in OGLE-II 1997-1999 Database. A Preliminary Study

We present 18 binary lens candidates from OGLE-II database for seasons 1997-1999. The candidates have been selected by visual light curves inspection from the subsample of strong transient events; the same procedure gives 215 single lens…

Astrophysics · Physics 2007-05-23 M. Jaroszynski

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

Finding the Brightest Galactic Bulge Microlensing Events with a Small Aperture Telescope and Image Subtraction

Following the suggestion of Gould and Depoy (1998) we investigate the feasibility of studying the brightest microlensing events towards the Galactic bulge using a small aperture (~10 cm) telescope. We used one of the HAT telescopes to…

Astrophysics of Galaxies · Physics 2009-05-01 D. M. Nataf , K. Z. Stanek , G. A. Bakos

The Optical Gravitational Lensing Experiment. Eclipsing Binary Stars in the Large Magellanic Cloud

We present the catalog of 2580 eclipsing binary stars detected in 4.6 square degree area of the central parts of the Large Magellanic Cloud. The photometric data were collected during the second phase of the OGLE microlensing search from…

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

Red noise versus planetary interpretations in the microlensing event OGLE-2013-BLG-446

For all exoplanet candidates, the reliability of a claimed detection needs to be assessed through a careful study of systematic errors in the data to minimize the false positives rate. We present a method to investigate such systematics in…

Earth and Planetary Astrophysics · Physics 2015-10-29 E. Bachelet , D. M. Bramich , C. Han , J. Greenhill , R. A. Street , A. Gould , G. D Ago , K. AlSubai , M. Dominik , R. Figuera Jaimes , K. Horne , M. Hundertmark , N. Kains , C. Snodgrass , I. A. Steele , Y. Tsapras , M. D. Albrow , V. Batista , J. -P. Beaulieu , D. P. Bennett , S. Brillant , J. A. R. Caldwell , A. Cassan , A. Cole , C. Coutures , S. Dieters , D. Dominis Prester , J. Donatowicz , P. Fouque , K. Hill , J. -B. Marquette , J. Menzies , C. Pere , C. Ranc , J. Wambsganss , D. Warren , L. Andrade de Almeida , J. -Y. Choi , D. L. DePoy , Subo Dong , L. -W. Hung , K. H. Hwang , F. Jablonski , Y. K. Jung , S. Kaspi , N. Klein , C. -U. Lee , D. Maoz , J. A. Munoz , D. Nataf , H. Park , R. W. Pogge , D. Polishook , I. -G. Shin , A. Shporer , J. C. Yee F. Abe , A. Bhattacharya , I. A. Bond , C. S. Botzler , M. Freeman , A. Fukui , Y. Itow , N. Koshimoto , C. H. Ling , K. Masuda , Y. Matsubara , Y. Muraki , K. Ohnishi , L. C. Philpott , N. Rattenbury , To. Saito , D. J. Sullivan , T. Sumi , D. Suzuki , P. , J. Tristram , A. Yonehara , V. Bozza , S. Calchi Novati , S. Ciceri , P. Galianni , S. H. Gu , K. Harpsoe , T. C. Hinse , U. G. Jorgensen , D. Juncher , H. Korhonen , L. Mancini , C. Melchiorre , A. Popovas , A. Postiglione , M. Rabus , S. Rahvar , R. W. Schmidt , G. Scarpetta , J. Skottfelt , John Southworth , An. Stabile , J. Surdej , X. -B. Wang , O. Wertz

The Optical Depth to Gravitational Microlensing in the Direction of the Galactic Bulge

We present the analysis of the first two years of the OGLE search for gravitational lenses towards the Galactic bulge. We detected 9 microlensing events in an algorithmic search of $ \sim 10^8 $ measurements of $ \sim 10^6 $ stars. The…

Astrophysics · Physics 2007-05-23 A. Udalski , M. Szymanski , K. Z. Stanek , J. Kaluzny , M. Kubiak , M. Mateo , W. Krzeminski , B. Paczynski , R. Venkat