Systematic Reanalysis of KMTNet Microlensing Events. II. Two New Planets in Giant-source Events

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dc.citation.issue6
dc.citation.volume169
dc.contributor.authorYang H
dc.contributor.authorYee JC
dc.contributor.authorZhang J
dc.contributor.authorLee C-U
dc.contributor.authorKim D-J
dc.contributor.authorBond IA
dc.contributor.authorUdalski A
dc.contributor.authorHwang K-H
dc.contributor.authorZang W
dc.contributor.authorQian Q
dc.contributor.authorGould A
dc.contributor.authorMao S
dc.contributor.authorAlbrow MD
dc.contributor.authorChung S-J
dc.contributor.authorHan C
dc.contributor.authorJung YK
dc.contributor.authorRyu Y-H
dc.contributor.authorShin I-G
dc.contributor.authorShvartzvald Y
dc.contributor.authorCha S-M
dc.contributor.authorKim H-W
dc.contributor.authorKim S-L
dc.contributor.authorLee D-J
dc.contributor.authorLee Y
dc.contributor.authorPark B-G
dc.contributor.authorPogge RW
dc.contributor.authorAbe F
dc.contributor.authorBando K
dc.contributor.authorBennett DP
dc.contributor.authorBhattacharya A
dc.contributor.authorFukui A
dc.contributor.authorHamada R
dc.contributor.authorHamada S
dc.contributor.authorHamasaki N
dc.contributor.authorHirao Y
dc.contributor.authorSilva SI
dc.contributor.authorItow Y
dc.contributor.authorKoshimoto N
dc.contributor.authorMatsubara Y
dc.contributor.authorMiyazaki S
dc.contributor.authorMuraki Y
dc.contributor.authorNagai T
dc.contributor.authorNunota K
dc.contributor.authorOlmschenk G
dc.contributor.authorRanc C
dc.contributor.authorRattenbury NJ
dc.contributor.authorSatoh Y
dc.contributor.authorSumi T
dc.contributor.authorSuzuki D
dc.contributor.authorTerry SK
dc.contributor.authorTristram PJ
dc.contributor.authorVandorou A
dc.contributor.authorYama H
dc.contributor.authorMróz P
dc.contributor.authorSkowron J
dc.contributor.authorPoleski R
dc.contributor.authorSzymański MK
dc.contributor.authorSoszyński I
dc.contributor.authorPietrukowicz P
dc.contributor.authorKozłowski S
dc.contributor.authorUlaczyk K
dc.contributor.authorRybicki KA
dc.contributor.authorIwanek P
dc.contributor.authorWrona M
dc.date.accessioned2025-09-02T23:45:12Z
dc.date.available2025-09-02T23:45:12Z
dc.date.issued2025-06-01
dc.description.abstractIn this work, we continue to apply the updated KMTNet tender-love care photometric pipeline to historical microlensing events. We apply the pipeline to a subsample of events from the KMTNet database, which we refer to as the giant source sample. Leveraging the improved photometric data, we conduct a systematic search for anomalies within this sample. The search successfully uncovers four new planet-like anomalies and recovers two previously known planetary signals. After detailed analysis, two of the newly discovered anomalies are confirmed as clear planets: KMT-2019-BLG-0578 and KMT-2021-BLG-0736. Their planet-to-host mass ratios are q ∼ 4 × 10−3 and q ∼ 1 × 10−4, respectively. Another event, OGLE-2018-BLG-0421 (KMT-2018-BLG-0831), remains ambiguous. Both a stellar companion and a giant planet in the lens system could potentially explain the observed anomaly. The anomaly signal of the last event, MOA-2022-BLG-038 (KMT-2022-BLG-2342), is attributed to an extra source star. Within this sample, our procedure doubles the number of confirmed planets, demonstrating a significant enhancement in the survey sensitivity.
dc.description.confidentialfalse
dc.edition.editionJune 2025
dc.identifier.citationYang H, Yee JC, Zhang J, Lee CU, Kim DJ, Bond IA, Udalski A, Hwang KH, Zang W, Qian Q, Gould A, Mao S, Albrow MD, Chung SJ, Han C, Jung YK, Ryu YH, Shin IG, Shvartzvald Y, Cha SM, Kim HW, Kim SL, Lee DJ, Lee Y, Park BG, Pogge RW, Abe F, Bando K, Bennett DP, Bhattacharya A, Fukui A, Hamada R, Hamada S, Hamasaki N, Hirao Y, Silva SI, Itow Y, Koshimoto N, Matsubara Y, Miyazaki S, Muraki Y, Nagai T, Nunota K, Olmschenk G, Ranc C, Rattenbury NJ, Satoh Y, Sumi T, Suzuki D, Terry SK, Tristram PJ, Vandorou A, Yama H, Mróz P, Skowron J, Poleski R, Szymański MK, Soszyński I, Pietrukowicz P, Kozłowski S, Ulaczyk K, Rybicki KA, Iwanek P, Wrona M. (2025). Systematic Reanalysis of KMTNet Microlensing Events. II. Two New Planets in Giant-source Events. Astronomical Journal. 169. 6.
dc.identifier.doi10.3847/1538-3881/adc73e
dc.identifier.eissn1538-3881
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6256
dc.identifier.number295
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/73463
dc.languageEnglish
dc.publisherIOP Publishing on behalf of the American Astronomical Society.
dc.publisher.urihttps://iopscience.iop.org/article/10.3847/1538-3881/adc73e
dc.relation.isPartOfAstronomical Journal
dc.rights(c) 2025 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectExoplanets (498)
dc.subjectGravitational microlensing (672)
dc.subjectGravitational microlensing exoplanet detection (2147)
dc.subjectLight curves (918)
dc.subjectPhotometry (1234)
dc.titleSystematic Reanalysis of KMTNet Microlensing Events. II. Two New Planets in Giant-source Events
dc.typeJournal article
pubs.elements-id501507
pubs.organisational-groupOther
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