J/AJ/164/180 Mass Production 2021 KMTNet Microlensing Planets. I. (Ryu+, 2022)
Mass Production of 2021 KMTNet Microlensing Planets. I.
Ryu Y.-H., Jung Y.K., Yang H., Gould A., Albrow M.D., Chung S.-J., Han C.,
Hwang K.-H., Shin I.-G., Shvartzvald Y., Yee J.C., 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.
<Astron. J., 164, 180 (2022)>
=2022AJ....164..180R 2022AJ....164..180R (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing; Exoplanets; Photometry, RI
Keywords: Gravitational microlensing
Abstract:
We inaugurate a program of "mass production" of microlensing planets
discovered in 2021 KMTNet data, with the aim of laying the basis for
future statistical studies. While we ultimately plan to quickly
publish all 2021 planets meeting some minimal criteria, the current
sample of four was chosen simply on the basis of having low initial
estimates of the planet-host mass ratio, q. It is therefore notable
that two members of this sample suffer from a degeneracy in the
normalized source radius ρ arises from different morphologies of
closely spaced caustics. All four planets (KMT-2021-BLG-1391,
KMT-2021-BLG-1253, KMT-2021-BLG-1372, KMT-2021-BLG-0748) have
well-characterized mass ratios, q, and therefore are suitable for
mass-ratio frequency studies. Both of the ρ degeneracies can be
resolved by future adaptive optics (AO) observations on 30m class
telescopes. We provide general guidance for such AO observations for
all events in anticipation of the prospect that they will
revolutionize the field of microlensing planets.
Description:
KMTNet observes from three identical 1.6m telescopes, each equipped
with a (2x2°) camera at Cerro Tololo Inter-American Observatory
(CTIO) in Chile (KMTC), South African Astronomical Observatory (SAAO)
in South Africa (KMTS), and Siding Spring Observatory (SSO) in
Australia (KMTA). KMTNet observes primarily in the I-band, with 60s
exposures.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 70 4 Event names, cadences, alerts, and locations
fig1.dat 39 4262 Light curve for KMT-2021-BLG-1391
fig3.dat 39 6513 Light curve for KMT-2021-BLG-1253
fig5.dat 39 1554 Light curve for KMT-2021-BLG-1372
fig6.dat 39 668 Light curve for KMT-2021-BLG-0748
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See also:
J/A+A/617/A135 : 20 years of photometric microlensing (Mustill+, 2018)
J/AJ/159/98 : I-band LC of microlensing event KMT-2016-BLG-1836 (Yang+, 2020)
J/AJ/159/262 : OGLE/KMTnet VI bands photometry OGLE2019-BLG-0551 (Mroz+, 2020)
J/ApJ/903/L11 : OGLE and KMTNet light curve of OGLE-2016-BLG-1928 (Mroz+, 2020)
J/A+A/649/A90 : KMT-2018-BLG-1025Lb I light curve (Han+, 2021)
J/AJ/161/293 : LCs of OGLE-2018-BLG-0567 and OGLE-2018-BLG-0962 (Jung+, 2021)
J/AJ/162/96 : Iband light curve of KMT-2016-BLG-2605 with KMTNet (Ryu+, 2021)
J/AJ/164/75 : Light curve of microlensing MOA-2019-BLG-008L (Bachelet+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Name Event identifier
19- 21 F3.1 /h Cad [0.4/4] Cadence
23- 24 I2 d Date.D Alert date, day
26- 28 A3 "month" Date.M Alert date, month
30- 33 I4 yr Date.Y [2021] Alert date, year
35- 36 I2 h RAh [17/18] Hour of right ascension (J2000)
38- 39 I2 min RAm Minute of right ascension (J2000)
41- 45 F5.2 s RAs Second of right ascension (J2000)
47 A1 --- DE- [-] Sign of declination (J2000)
48- 49 I2 deg DEd [25/29] Degree of declination (J2000)
51- 52 I2 arcmin DEm Arcminute of declination (J2000)
54- 58 F5.2 arcsec DEs Arcsecond of declination (J2000)
60- 64 F5.2 deg GLON [-0.21/5.44] Galactic longitude
66- 70 F5.2 deg GLAT [-3.03/1.85] Galactic latitude
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Byte-by-byte Description of file: fig[1356].dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Inst KMT observatory code (1)
10- 20 F11.6 d HJD Heliocentric Julian Date
22- 30 F9.6 mag Imag Apparent I band magnitude
32- 39 F8.6 mag e_Imag Uncertainty in Imag
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Note (1): Observatories as follows:
KMTC = 1.6m CTIO (Chile) telescope
KMTS = 1.6m SAAO (South Africa) telescope
KMTA = 1.6m SSO (Australia) telescope
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS] 25-Nov-2022