J/AJ/165/103 Systematic KMTNet Planetary Anomaly Search. VII. (Zang+, 2023)
Systematic KMTNet Planetary Anomaly Search.
VII. Complete Sample of q<10-4 Planets from the First 4yr Survey.
Zang W., Jung Y.K., Yang H., Zhang X., Udalski A., Yee J.C., Gould A.,
Mao S., (the Leading Authors), Albrow M.D., Chung S.-J., Han C.,
Hwang K.-H., Ryu Y.-H., Shin I.-G., Shvartzvald Y., 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.,
(the Kmtnet Collaboration), Mroz P., Skowron J., Poleski R.,
Szymanski M.K., Soszynski I., Pietrukowicz P., Kozlowski S., Ulaczyk K.,
Rybicki K.A., Iwanek P., Wrona M., Gromadzki M., (the Ogle Collaboration),
Wang H., Zhang J., Zhu W., (the Map Collaboration)
<Astron. J., 165, 103 (2023)>
=2023AJ....165..103Z 2023AJ....165..103Z (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets; Gravitational lensing; Photometry, RI
Keywords: Gravitational microlensing exoplanet detection
Abstract:
We present the analysis of seven microlensing planetary events with
planet/host mass ratios q<10-4: KMT-2017-BLG-1194,
KMT-2017-BLG-0428, KMT-2019-BLG-1806, KMT-2017-BLG-1003,
KMT-2019-BLG-1367, OGLE-2017-BLG-1806, and KMT-2016-BLG-1105. They
were identified by applying the Korea Microlensing Telescope Network
(KMTNet) AnomalyFinder algorithm to 2016-2019 KMTNet events. A
Bayesian analysis indicates that all the lens systems consist of a
cold super-Earth orbiting an M or K dwarf. Together with 17 previously
published and three that will be published elsewhere, AnomalyFinder
has found a total of 27 planets that have solutions with q<10-4 from
2016-2019 KMTNet events, which lays the foundation for the first
statistical analysis of the planetary mass-ratio function based on
KMTNet data. By reviewing the 27 planets, we find that the missing
planetary caustics problem in the KMTNet planetary sample has been
solved by AnomalyFinder. We also find a desert of high-magnification
planetary signals (A≳65), and a follow-up project for KMTNet
high-magnification events could detect at least two more q<10-4
planets per year and form an independent statistical sample.
Description:
Korea Microlensing Telescope Network (KMTNet) conducted observations
from three identical 1.6m telescopes equipped with 4deg2 cameras in
Chile (KMTC), South Africa (KMTS), and Australia (KMTA). Optical
Gravitational Lensing Experiment (OGLE) took data using an 1.3m
telescope with 1.4deg2 field of view in Chile. For both surveys,
most of the images were taken in the I-band, and a fraction of V-band
images were acquired for source color measurements. Each KMTNet V-band
data point was taken one minute before or after one KMTNet I-band data
point of the same field.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 74 9 The six planetary events
fig1.dat 33 950 The observed data for KMT-2017-BLG-1194
fig4.dat 33 11432 The observed data for KMT-2017-BLG-0428
fig5.dat 33 5204 The observed data for KMT-2019-BLG-1806
fig6.dat 33 2461 The observed data for KMT-2017-BLG-1003
fig7.dat 33 3252 The observed data for KMT-2019-BLG-1367
fig8.dat 33 2809 The observed data for KMT-2017-BLG-1806
fig10.dat 33 3077 The observed data for KMT-2016-BLG-1105
--------------------------------------------------------------------------------
See also:
J/A+A/529/A102 : MOA-2007-BLG-387Lb light curve I band (Batista+, 2011)
J/AJ/154/210 : 2015 high-cadence Spitzer microlensing events (Zhu+, 2017)
J/AJ/160/255 : KMTNet & OGLE I photometry of KMT-2019-BLG-0842 (Jung+, 2020)
J/A+A/649/A90 : KMT-2018-BLG-1025Lb I light curve (Han+, 2021)
J/AJ/162/163 : Systematic KMTNet Planetary Anomaly Search. I. (Zang+, 2021)
J/AJ/163/43 : Systematic KMTNet Planetary Anomaly Search. II. (Hwang+, 2022)
J/AJ/164/118 : VRI light curve of MOA 2020-BLG-135 (Ishitani Silva+, 2022)
J/AJ/164/180 : Mass Production 2021 KMTNet Microlensing PlanetsI (Ryu+, 2022)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Name Event name
20- 21 I2 d Obs.D ? Day of observation
23- 25 A3 "month" Obs.M Month of observation
27- 30 I4 yr Obs.Y [2017/2019]? Year of observation
32 A1 --- f_Obs.Y [*] Flag means post season
34- 35 I2 h RAh [17/18] Hour of right ascension (J2000)
37- 38 I2 min RAm Minute of right ascension (J2000)
40- 44 F5.2 s RAs Minute of right ascension (J2000)
46 A1 --- DE- [-] Sign of declination (J2000)
48- 49 I2 deg DEd [24/29] 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 [1.41/6.63] Galactic longitude (l)
66- 70 F5.2 deg GLAT [-4.99/3.15] Galactic latitude (b)
72- 74 F3.1 /hr Cad [0.3/4] Nominal cadence Γ
--------------------------------------------------------------------------------
Byte-by-byte Description of file: fig[145678].dat fig10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Tel Telescope identifier
8- 18 F11.6 d HJD Heliocentric Julian date; HJD-2450000
20- 26 F7.4 mag Imag Apparent I band magnitude
28- 33 F6.4 mag e_Imag Uncertainty in Imag
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Zang et al. Paper I: 2021AJ....162..163Z 2021AJ....162..163Z Cat. J/AJ/162/163
Hwang et al. Paper II: 2022AJ....163...43H 2022AJ....163...43H Cat. J/AJ/163/43
Zang et al. Paper IV: 2022MNRAS.515..928Z 2022MNRAS.515..928Z
Gould et al. Paper V: 2022A&A...664A..13G 2022A&A...664A..13G
Jung et al. Paper VI: 2022AJ....164..262J 2022AJ....164..262J
(End) Prepared by [AAS], Coralie Fix [CDS], 08-Jun-2023