418 citations · 5.2k across the 75 of their papers we have counts for
75 papers
Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035
A. Herald, A. Udalski, V. Bozza +89
Context. Brown dwarfs are poorly understood transition objects between stars and planets, with several competing mechanisms having been proposed for their formation. Mass measureme…
A Wide Orbit Exoplanet OGLE-2012-BLG-0838Lb
Poleski R., Suzuki D., Udalski A. +48
We present the discovery of a planet on a very wide orbit in the microlensing event OGLE-2012-BLG-0838. The signal of the planet is well separated from the main peak of the event a…
The KMTNet/K2-C9 (Kepler) Data Release
H. -W. Kim, K. -H. Hwang, D. -J. Kim +18
We present Korea Microlensing Telescope Network (KMTNet) light curves for microlensing-event candidates in the Kepler K2 C9 field having peaks within 3 effective timescales of the…
Spitzer Microlensing Parallax for OGLE-2016-BLG-1067: a sub-Jupiter Orbiting an M-dwarf in the Disk
S. Calchi Novati, D. Suzuki, A. Udalski +65
We report the discovery of a sub-Jupiter mass planet orbiting beyond the snow line of an M-dwarf most likely in the Galactic disk as part of the joint Spitzer and ground-based moni…
OGLE-2014-BLG-0289: Precise Characterization of a Quintuple-Peak Gravitational Microlensing Event
A. Udalski, C. Han, V. Bozza +63
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 crossi…
A Neptune-mass Free-floating Planet Candidate Discovered by Microlensing Surveys
Przemek Mroz, Y. -H. Ryu, J. Skowron +26
Current microlensing surveys are sensitive to free-floating planets down to Earth-mass objects. All published microlensing events attributed to unbound planets were identified base…
The First Planetary Microlensing Event with Two Microlensed Source Stars
D. P. Bennett, A. Udalski, C. Han +64
We present the analysis of microlensing event MOA-2010-BLG-117, and show that the light curve can only be explained by the gravitational lensing of a binary source star system by a…
An Earth-mass Planet in a 1-AU Orbit around an Ultracool Dwarf
Y. Shvartzvald, J. C. Yee, S. Calchi Novati +22
We combine and ground-based KMTNet microlensing observations to identify and precisely measure an Earth-mass () planet OGLE-2016-BLG-1195Lb…
OGLE-2015-BLG-1482L: the first isolated low-mass microlens in the Galactic bulge
S. -J. Chung, W. Zhu, A. Udalski +35
We analyze the single microlensing event OGLE-2015-BLG-1482 simultaneously observed from two ground-based surveys and from \textit{Spitzer}. The \textit{Spitzer} data exhibit finit…
Korea Microlensing Telescope Network Microlensing Events from 2015: Event-Finding Algorithm, Vetting, and Photometry
D. -J. Kim, H. -W. Kim, K. -H. Hwang +15
We present microlensing events in the 2015 Korea Microlensing Telescope Network (KMTNet) data and our procedure for identifying these events. In particular, candidates were detecte…
Toward a Galactic Distribution of Planets. I. Methodology & Planet Sensitivities of the 2015 High-Cadence Spitzer Microlens Sample
Wei Zhu, A. Udalski, S. Calchi Novati +35
We analyze an ensemble of microlensing events from the 2015 Spitzer microlensing campaign, all of which were densely monitored by ground-based high-cadence survey teams. The simult…
OGLE-2015-BLG-0196: Ground-based Gravitational Microlens Parallax Confirmed By Space-Based Observation
C. Han, A. Udalski, A. Gould +20
In this paper, we present the analysis of the binary gravitational microlensing event OGLE-2015-BLG-0196. The event lasted for almost a year and the light curve exhibited significa…
Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of A Long-term Asymmetric Perturbation
Y. K. Jung, A. Udalski, J. C. Yee +50
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…
The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
D. P. Bennett, S. H. Rhie, A. Udalski +79
We present the analysis of the first circumbinary planet microlensing event, OGLE-2007-BLG-349. This event has a strong planetary signal that is best fit with a mass ratio of $q \a…
OGLE-2016-BLG-0596Lb: High-Mass Planet From High-Magnification Pure-Survey Microlensing Event
P. Mróz, C. Han, A. Udalski +24
We report the discovery of a high mass-ratio planet , i.e., 13 times higher than the Jupiter/Sun ratio. The host mass is not presently measured but can be determined or st…
OGLE-2015-BLG-0479LA,B: Binary Gravitational Microlens Characterized by Simultaneous Ground-based and Space-based Observation
C. Han, A. Udalski, A. Gould +60
We present a combined analysis of the observations of the gravitational microlensing event OGLE-2015-BLG-0479 taken both from the ground and by the {\it Spitzer Space Telescope}. T…
OGLE-2015-BLG-0051/KMT-2015-BLG-0048Lb: a Giant Planet Orbiting a Low-mass Bulge Star Discovered by High-cadence Microlensing Surveys
C. Han, A. Udalski, A. Gould +20
We report the discovery of an extrasolar planet detected from the combined data of a microlensing event OGLE-2015-BLG-0051/KMT-2015-BLG-0048 acquired by two microlensing surveys. D…
Space-based Microlens Parallax Observation As a Way to Resolve the Severe Degeneracy between Microlens-parallax and Lens-orbital Effect
C. Han, A. Udalski, C. -U. Lee +23
In this paper, we demonstrate the severity of the degeneracy between the microlens-parallax and lens-orbital effects by presenting the analysis of the gravitational binary-lens eve…
Revisiting the microlensing event OGLE 2012-BLG-0026: A solar mass star with two cold giant planets
J. P. Beaulieu, D. P. Bennett, V. Batista +15
Two cold, gas giant planets orbiting a G-type main sequence star in the galactic disk have previously been discovered in the high magnification microlensing event OGLE-2012-BLG-002…
The First Neptune Analog or Super-Earth with Neptune-like Orbit: MOA-2013-BLG-605Lb
T. Sumi, A. Udalski, D. P. Bennett +46
We present the discovery of the first Neptune analog exoplanet or super-Earth with Neptune-like orbit, MOA-2013-BLG-605Lb. This planet has a mass similar to that of Neptune or a su…
Red noise versus planetary interpretations in the microlensing event OGLE-2013-BLG-446
E. Bachelet, D. M. Bramich, C. Han +98
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 r…
Mass Measurements of Isolated Objects from Space-based Microlensing
Wei Zhu, S. Calchi Novati, A. Gould +78
We report on the mass and distance measurements of two single-lens events from the 2015 \emph{Spitzer} microlensing campaign. With both finite-source effect and microlens parallax…
Spitzer Parallax of OGLE-2015-BLG-0966: A Cold Neptune in the Galactic Disk
R. A. Street, A. Udalski, S. Calchi Novati +106
We report the detection of a Cold Neptune m_planet=21+/-2MEarth orbiting a 0.38MSol M dwarf lying 2.5-3.3 kpc toward the Galactic center as part of a campaign combining ground-base…
Spitzer Microlens Measurement of a Massive Remnant in a Well-Separated Binary
Y. Shvartzvald, A. Udalski, A. Gould +63
We report the detection and mass measurement of a binary lens OGLE-2015-BLG-1285La,b, with the more massive component having (80% probability). A main-sequence…