J/AJ/159/98 I-band LC of the microlensing event KMT-2016-BLG-1836 (Yang+, 2020)
KMT-2016-BLG-1836Lb: a super-Jovian planet from a high-cadence microlensing
field.
Yang H., Zhang X., Hwang K.-H., Zang W., Gould A., Wang T., Mao S.,
Albrow M.D., Chung S.-J., Han C., Jung Y.K., Ryu Y.-H., Shin I.-G.,
Shvartzvald Y., Yee J.C., Zhu W., Penny M.T., Fouque P., Cha S.-M.,
Kim D.-J., Kim H.-W., Kim S.-L., Lee C.-U., Lee D.-J., Lee Y., Park B.-G.,
Pogge R.W.
<Astron. J., 159, 98 (2020)>
=2020AJ....159...98Y 2020AJ....159...98Y
ADC_Keywords: Exoplanets; Gravitational lensing; Photometry, RI
Keywords: Gravitational microlensing exoplanet detection
Abstract:
We report the discovery of a super-Jovian planet in the microlensing
event KMT-2016-BLG-1836, which was found by the Korea Microlensing
Telescope Network (KMTNet) high-cadence observations (Γ∼4/hr).
The planet-host mass ratio q∼0.004. A Bayesian analysis indicates that
the planetary system is composed of a super-Jovian
Mplanet=2.2-1.1+1.9MJ planet orbiting an M or K dwarf,
Mhost=0.49-0.25+0.38M☉, at a distance of
DL=7.1-2.4+0.8kpc. The projected planet-host separation is
3.5-0.9+1.1au, implying that the planet is located beyond the snow
line of the host star. Future high-resolution images can potentially
strongly constrain the lens brightness and thus the mass and distance
of the planetary system. Without considering detailed detection
efficiency, selection, or publication biases, we find a potential
mass-ratio desert at -3.7≲logq≲-3.0 for the 31 published KMTNet
planets.
Description:
The Korea Microlensing Telescope Network (KMTNet) continuously
monitors a broad area at relatively high-cadence toward the Galactic
bulge from three 1.6m telescopes equipped with 4°2 field-of-view
(FOV) cameras at the Cerro Tololo Inter-American Observatory (CTIO) in
Chile (KMTC), the South African Astronomical Observatory (SAAO) in
South Africa (KMTS), and the Siding Spring Observatory (SSO) in
Australia (KMTA).
The super-Jovian planet KMT-2016-BLG-1836b was found by applying the
KMTNet event-finding algorithm (Kim+ 2018AJ....155...76K 2018AJ....155...76K) to the 2016
KMTNet survey data (Kim+ 2018, arXiv:1804.03352), and the apparently
amplified flux of a KMTNet catalog star I=19.20±0.13 derived from
the OGLE-III star catalog (Szymanski+ 2011, II/323) led to the
detection of this microlensing event.
KMT-2016-BLG-1836 was located in two slightly offset fields, BLG02 and
BLG42, with a nominal combined cadence of Γ∼4/hr. The majority
of observations were taken in the I band, with about 10% of the KMTC
images and 5% of the KMTS images taken in the V band for the color
measurement of microlens sources.
Objects:
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RA (2000) DE Designation(s)
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17 53 00.08 -30 02 26.7 KMT-2016-BLG-1836 = KMT-2016-BLG-1836
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 32 9265 KMT-2016-BLG-1836 data
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/A+A/549/A147 : Abundances of microlensed bulge dwarf stars. V. (Bensby+,2013)
J/ApJ/778/150 : Microlensing events toward the Bulge from MOA-II (Sumi+, 2013)
J/AJ/154/210 : 2015 high-cadence Spitzer microlensing events (Zhu+, 2017)
J/AcA/68/183 : Predicted Microlensing Events 21st Century (Bramich+, 2018)
J/A+A/618/A44 : Predicted microlensing events from Gaia DR2 (Bramich, 2018)
J/A+A/617/A135 : 20 years of photometric microlensing (Mustill+, 2018)
J/AJ/155/186 : The KMTNet/K2-C9 (Kepler) Data Release (Kim+, 2018)
J/ApJS/244/29 : Microlensing events toward the Galactic bulge (Mroz+, 2019)
J/A+A/633/A98 : Gaia16aye microlensing event photometry (Wyrzykowski+, 2020)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Tel KMTNet telescope identifier (1)
5- 15 F11.6 d HJD [7439/7682] Heliocentric Julian Date;
HJD-2450000
17- 24 F8.5 mag Imag [16.4/22] Apparent I band magnitude
26- 32 F7.5 mag e_Imag [0.01/7.7] Uncertainty in I band
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Note (1): Identifiers as follows:
A02 = Siding Spring Observatory (SSO) in Australia (KMTA),
BLG02 field (1275 occurrences)
A42 = Siding Spring Observatory (SSO) in Australia (KMTA),
BLG42 field (1237 occurrences)
C02 = Cerro Tololo Inter-American Observatory (CTIO) in Chile (KMTC),
BLG02 field (1647 occurrences)
C42 = Cerro Tololo Inter-American Observatory (CTIO) in Chile (KMTC),
BLG42 field (1572 occurrences)
S02 = South African Astronomical Observatory (SAAO) in South Africa (KMTS),
BLG02 field (1768 occurrences)
S42 = South African Astronomical Observatory (SAAO) in South Africa (KMTS),
BLG42 field (1766 occurrences)
See the "Description" section above.
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History:
From electronic version of the journal
(End) Prerpared by [AAS], Coralie Fix [CDS], 24-Apr-2020