J/AJ/166/253 OGLE/KMTNet light curve for OGLE-2019-BLG-1180 (Chung+, 2023)
OGLE-2019-BLG-1180Lb: Discovery of a Wide-orbit Jupiter-mass Planet around a
Late-type Star.
Chung S.-J., Udalski A., Yee J.C., Gould A., (the Leading Authors),
Albrow M.D., Jung Y.K., Hwang K.-H., Han C., Ryu Y.-H., Shin I.-G.,
Shvartzvald Y., Yang H., Zang W., Cha S.-M., Kim D.-J., Kim S.-L.,
Lee C.-U., Lee D.-J., Lee Y., Park B.-G., Pogge R.W.,
(the Kmtnet Collaboration), Poleski R., Mroz P., Skowron J.,
Szymanski M.K., Soszynski I., Pietrukowicz P., Kozlowski S., Ulaczyk K.,
Rybicki K.A., Iwanek P., Wrona M., Gromadzki M., (the Ogle Collaboration)
<Astron. J., 166, 253 (2023)>
=2023AJ....166..253C 2023AJ....166..253C (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing; Exoplanets; Stars, late-type;
Spectra, optical
Keywords: Exoplanet detection methods; Gravitational microlensing
Gravitational microlensing exoplanet detection
Abstract:
We report on the discovery and analysis of the planetary microlensing
event OGLE-2019-BLG-1180 with a planet-to-star mass ratio q∼0.003. The
event OGLE-2019-BLG-1180 has unambiguous cusp-passing and
caustic-crossing anomalies, which were caused by a wide planetary
caustic with s∼2, where s is the star-planet separation in units of
the angular Einstein radius {Teta}E. Thanks to well-covered
anomalies by the Korea Micorolensing Telescope Network (KMTNet), we
measure both the angular Einstein radius and the microlens parallax in
spite of a relatively short event timescale of tE=28 days. However,
because of a weak constraint on the parallax, we conduct a Bayesian
analysis to estimate the physical lens parameters. We find that the
lens system is a super-Jupiter-mass planet of
Mp=1.75-0.51+0.53MJ orbiting a late-type star of
Mh=0.55-0.26+0.27M☉ at a distance DL=6.1-1.3+0.9kpc.
The projected star-planet separation is a⊥=5.19-1.23+0.90au,
which means that the planet orbits at about four times the snow line
of the host star. Considering the relative lens-source proper motion
of µrel=6mas/yr, the lens will be separated from the source by
60mas in 2029. At that time one can measure the lens flux from
adaptive optics imaging of Keck or a next-generation 30m class
telescope. OGLE-2019-BLG-1180Lb represents a growing population of
wide-orbit planets detected by KMTNet, so we also present a general
investigation into prospects for further expanding the sample of such
planets.
Description:
The event was first alerted by the Optical Gravitational Lensing
Experiment (OGLE). OGLE uses a 1.3m telescope with a 1.4deg2 field
of view (FOV) at Las Campanas Observatory in Chile. The event lies in
the OGLE IV field BLG504, which is observed with a cadence of ∼0.4/hr.
KMTNet also detected this event, and it was designated as
KMT-2019-BLG-1912. KMTNet uses 1.6m telescopes with 4deg2 FOV
cameras at three different southern sites: the Cerro Tololo
Inter-American Observatory in Chile (KMTC), the South African
Astronomical Observatory (KMTS), and the Siding Spring Observatory in
Australia (KMTA). The event lies in the KMT main field BLG02 with a
cadence of ∼2/hr.
Objects:
-----------------------------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------------------------
17 56 59.16 -27 58 31.5 OGLE-2019-BLG-1180 = KMT-2019-BLG-1912
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 30 5018 Light curve of the best-fit parallax+orbital
lens model of OGLE-2019-BLG-1180
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See also:
J/AJ/159/262 : OGLE/KMTnet VI photometry of OGLE-2019-BLG-0551 (Mroz+, 2020)
J/AJ/160/255 : KMTNet & OGLE I-photometry of KMT-2019-BLG-0842 (Jung+, 2020)
J/ApJ/903/L11 : OGLE and KMTNet light curve of OGLE-2016-BLG-1928 (Mroz+, 2020)
J/AJ/162/203 : Photometry of OGLE-2019-BLG-0304 with OGLE & KMTNet (Han+, 2021)
J/AJ/164/102 : OGLE, KMTNet & Spitzer EWS2017-BLG-1038 lc (Malpas+, 2022)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Inst Instrument used (1)
8- 17 F10.5 d HJD Heliocentric Julian Date HJD-2450000
19- 24 F6.3 mag Imag Apparent I-band magnitude
26- 30 F5.3 mag e_Imag Uncertainty on Imag
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Note (1): KMTA02 = KMTNet, Siding Spring Observatory
KMTC02 = KMTNet, Cerro Tololo Interamerican Observatory
KMTS02 = KMTNet, South African Astronomical Observatory
OGLE = Optical Gravitational Lensing Experiment,
Las Campanas Observatory
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 12-Apr-2024