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An analysis of binary microlensing event OGLE-2015-BLG-0060
Y. Tsapras, A. Cassan, C. Ranc +83
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 par…
First assessment of the binary lens OGLE-2015_BLG-0232
E. Bachelet, V. Bozza, C. Han +51
We present an analysis of the microlensing event OGLE-2015-BLG-0232. This event is challenging to characterize for two reasons. First, the light curve is not well sampled during th…
Spitzer Opens New Path to Break Classic Degeneracy for Jupiter-Mass Microlensing Planet OGLE-2017-BLG-1140Lb
S. Calchi Novati, J. Skowron, Y. K. Jung +36
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 planet orbiting…
MOA-2015-BLG-337: A Planetary System with a Low-mass Brown Dwarf/Planetary Boundary Host, or a Brown Dwarf Binary
S. Miyazaki, T. Sumi, D. P. Bennett +59
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 h…
OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Star
C. Han, Y. Hirao, A. Udalski +62
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 microlensing event OGLE-201…
OGLE-2017-BLG-1522: A giant planet around a brown dwarf located in the Galactic bulge
Y. K. Jung, A. Udalski, A. Gould +27
We report the discovery of a giant planet in the OGLE-2017-BLG-1522 microlensing event. The planetary perturbations were clearly identified by high-cadence survey experiments despi…
OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected From Spitzer Only
Tianshu Wang, S. Calchi Novati, A. Udalski +36
We analyze the binary gravitational microlensing event OGLE-2017-BLG-1130 (mass ratio q~0.45), the first published case in which the binary anomaly was only detected by the Spitzer…
OGLE-2017-BLG-1434Lb: Eighth q < 1 * 10^-4 Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function
A. Udalski, Y. -H. Ryu, S. Sajadian +55
We report the discovery of a cold Super-Earth planet (m_p=4.4 +/- 0.5 M_Earth) orbiting a low-mass (M=0.23 +/- 0.03 M_Sun) M dwarf at projected separation a_perp = 1.18 +/- 0.10 AU…
OGLE-2017-BLG-0373Lb: A Jovian Mass-Ratio Planet Exposes A New Accidental Microlensing Degeneracy
J. Skowron, Y. -H. Ryu, K. -H. Hwang +30
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 withi…
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…
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…
OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary
Y. -H. Ryu, J. C. Yee, A. Udalski +106
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…
OGLE-2015-BLG-1459L: The Challenges of Exo-Moon Microlensing
K. -H. Hwang, A. Udalski, I. A. Bond +57
We show that dense OGLE and KMTNet -band survey data require four bodies (sources plus lenses) to explain the microlensing light curve of OGLE-2015-BLG-1459. However, these can…
OGLE-2016-BLG-0613LABb: A Microlensing Planet in a Binary System
C. Han, A. Udalski, A. Gould +37
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 but with a discontinuous…
An Isolated Microlens Observed from K2, Spitzer and Earth
Wei Zhu, A. Udalski, C. Huang +50
We present the result of microlensing event MOA-2016-BLG-290, which received observations from the two-wheel Kepler (K2), Spitzer, as well as ground-based observatories. A joint an…
OGLE-2017-BLG-0173Lb: Low Mass-Ratio Planet in a "Hollywood" Microlensing Event
K. -H. Hwang, A. Udalski, Y. Shvartzvald +34
We present microlensing planet OGLE-2017-BLG-0173Lb, with planet-host mass ratio either or , the lowest or among the lowest e…
OGLE-2016-BLG-0263L\lowercase{b}: Microlensing Detection of a Very Low-mass Binary Companion Through a Repeating Event Channel
C. Han, A. Udalski, A. Gould +51
We report the discovery of a planet-mass companion to the microlens OGLE-2016-BLG-0263L. Unlike most low-mass companions that were detected through perturbations to the smooth and…
No large population of unbound or wide-orbit Jupiter-mass planets
Przemek Mroz, Andrzej Udalski, Jan Skowron +9
Gravitational microlensing is the only method capable of exploring the entire population of free-floating planets down to Mars-mass objects, because the microlensing signal does no…
OGLE-2016-BLG-0693LB: Probing the Brown Dwarf Desert with Microlensing
Y. -H. Ryu, A. Udalski, J. C. Yee +25
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 to analyze the light cur…
The Lowest Mass Ratio Planetary Microlens: OGLE 2016-BLG-1195Lb
I. A. Bond, D. P. Bennett, T. Sumi +37
We report discovery of the lowest mass ratio exoplanet to be found by the microlensing method in the light curve of the event OGLE~2016--BLG--1195. This planet revealed itself as a…
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…
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-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…