Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet

In order to exhume the buried signatures of “missing planetary caustics” in Korea Microlensing Telescope Network (KMTNet) data, we conducted a systematic anomaly search of the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search re...

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Veröffentlicht in:The Astronomical journal 2021-10, Vol.162 (4), p.163
Hauptverfasser: Zang, Weicheng, Hwang, Kyu-Ha, Udalski, Andrzej, Wang, Tianshu, Zhu, Wei, Sumi, Takahiro, Yee, Jennifer C., Gould, Andrew, Mao, Shude, Zhang, Xiangyu, Albrow, Michael D., Chung, Sun-Ju, Han, Cheongho, Jung, Youn Kil, Ryu, Yoon-Hyun, Shin, In-Gu, Shvartzvald, Yossi, Cha, Sang-Mok, Kim, Dong-Jin, Kim, Hyoun-Woo, Kim, Seung-Lee, Lee, Chung-Uk, Lee, Dong-Joo, Lee, Yongseok, Park, Byeong-Gon, Pogge, Richard W., Mróz, Przemek, Skowron, Jan, Poleski, Radoslaw, Szymański, Michał K., Soszyński, Igor, Pietrukowicz, Paweł, Kozłowski, Szymon, Ulaczyk, Krzysztof, Rybicki, Krzysztof A., Iwanek, Patryk, Wrona, Marcin, Gromadzki, Mariusz, Bond, Ian A., Abe, Fumio, Barry, Richard, Bennett, David P., Bhattacharya, Aparna, Donachie, Martin, Fujii, Hirosane, Fukui, Akihiko, Hirao, Yuki, Itow, Yoshitaka, Kirikawa, Rintaro, Kondo, Iona, Koshimoto, Naoki, Li, Man Cheung Alex, Matsubara, Yutaka, Muraki, Yasushi, Miyazaki, Shota, Olmschenk, Greg, Ranc, Clément, Rattenbury, Nicholas J., Satoh, Yuki, Shoji, Hikaru, Ishitani Silva, Stela, Suzuki, Daisuke, Tanaka, Yuzuru, Tristram, Paul J., Yamawaki, Tsubasa, Yonehara, Atsunori, Beichman, Charles A., Bryden, Geoffery, Calchi Novati, Sebastiano, Carey, Sean, Gaudi, B. Scott, Henderson, Calen B., Johnson, Samson
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container_title The Astronomical journal
container_volume 162
creator Zang, Weicheng
Hwang, Kyu-Ha
Udalski, Andrzej
Wang, Tianshu
Zhu, Wei
Sumi, Takahiro
Yee, Jennifer C.
Gould, Andrew
Mao, Shude
Zhang, Xiangyu
Albrow, Michael D.
Chung, Sun-Ju
Han, Cheongho
Jung, Youn Kil
Ryu, Yoon-Hyun
Shin, In-Gu
Shvartzvald, Yossi
Cha, Sang-Mok
Kim, Dong-Jin
Kim, Hyoun-Woo
Kim, Seung-Lee
Lee, Chung-Uk
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Mróz, Przemek
Skowron, Jan
Poleski, Radoslaw
Szymański, Michał K.
Soszyński, Igor
Pietrukowicz, Paweł
Kozłowski, Szymon
Ulaczyk, Krzysztof
Rybicki, Krzysztof A.
Iwanek, Patryk
Wrona, Marcin
Gromadzki, Mariusz
Bond, Ian A.
Abe, Fumio
Barry, Richard
Bennett, David P.
Bhattacharya, Aparna
Donachie, Martin
Fujii, Hirosane
Fukui, Akihiko
Hirao, Yuki
Itow, Yoshitaka
Kirikawa, Rintaro
Kondo, Iona
Koshimoto, Naoki
Li, Man Cheung Alex
Matsubara, Yutaka
Muraki, Yasushi
Miyazaki, Shota
Olmschenk, Greg
Ranc, Clément
Rattenbury, Nicholas J.
Satoh, Yuki
Shoji, Hikaru
Ishitani Silva, Stela
Suzuki, Daisuke
Tanaka, Yuzuru
Tristram, Paul J.
Yamawaki, Tsubasa
Yonehara, Atsunori
Beichman, Charles A.
Bryden, Geoffery
Calchi Novati, Sebastiano
Carey, Sean
Gaudi, B. Scott
Henderson, Calen B.
Johnson, Samson
description In order to exhume the buried signatures of “missing planetary caustics” in Korea Microlensing Telescope Network (KMTNet) data, we conducted a systematic anomaly search of the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search revealed the lowest-mass-ratio planetary caustic to date in the microlensing event OGLE-2019-BLG-1053, for which the planetary signal had not been noticed before. The planetary system has a planet–host mass ratio of q = (1.25 ± 0.13) × 10 −5 . A Bayesian analysis yielded estimates of the mass of the host star, M host = 0.61 − 0.24 + 0.29 M ⊙ , the mass of its planet, M planet = 2.48 − 0.98 + 1.19 M ⊕ , the projected planet–host separation, a ⊥ = 3.4 − 0.5 + 0.5 au, and the lens distance, D L = 6.8 − 0.9 + 0.6 kpc. The discovery of this very-low-mass-ratio planet illustrates the utility of our method and opens a new window for a large and homogeneous sample to study the microlensing planet–host mass ratio function down to q ∼ 10 −5 .
doi_str_mv 10.3847/1538-3881/ac12d4
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I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet</title><source>IOP Publishing Free Content</source><creator>Zang, Weicheng ; Hwang, Kyu-Ha ; Udalski, Andrzej ; Wang, Tianshu ; Zhu, Wei ; Sumi, Takahiro ; Yee, Jennifer C. ; Gould, Andrew ; Mao, Shude ; Zhang, Xiangyu ; Albrow, Michael D. ; Chung, Sun-Ju ; Han, Cheongho ; Jung, Youn Kil ; Ryu, Yoon-Hyun ; Shin, In-Gu ; Shvartzvald, Yossi ; Cha, Sang-Mok ; Kim, Dong-Jin ; Kim, Hyoun-Woo ; Kim, Seung-Lee ; Lee, Chung-Uk ; Lee, Dong-Joo ; Lee, Yongseok ; Park, Byeong-Gon ; Pogge, Richard W. ; Mróz, Przemek ; Skowron, Jan ; Poleski, Radoslaw ; Szymański, Michał K. ; Soszyński, Igor ; Pietrukowicz, Paweł ; Kozłowski, Szymon ; Ulaczyk, Krzysztof ; Rybicki, Krzysztof A. ; Iwanek, Patryk ; Wrona, Marcin ; Gromadzki, Mariusz ; Bond, Ian A. ; Abe, Fumio ; Barry, Richard ; Bennett, David P. ; Bhattacharya, Aparna ; Donachie, Martin ; Fujii, Hirosane ; Fukui, Akihiko ; Hirao, Yuki ; Itow, Yoshitaka ; Kirikawa, Rintaro ; Kondo, Iona ; Koshimoto, Naoki ; Li, Man Cheung Alex ; Matsubara, Yutaka ; Muraki, Yasushi ; Miyazaki, Shota ; Olmschenk, Greg ; Ranc, Clément ; Rattenbury, Nicholas J. ; Satoh, Yuki ; Shoji, Hikaru ; Ishitani Silva, Stela ; Suzuki, Daisuke ; Tanaka, Yuzuru ; Tristram, Paul J. ; Yamawaki, Tsubasa ; Yonehara, Atsunori ; Beichman, Charles A. ; Bryden, Geoffery ; Calchi Novati, Sebastiano ; Carey, Sean ; Gaudi, B. Scott ; Henderson, Calen B. ; Johnson, Samson</creator><creatorcontrib>Zang, Weicheng ; Hwang, Kyu-Ha ; Udalski, Andrzej ; Wang, Tianshu ; Zhu, Wei ; Sumi, Takahiro ; Yee, Jennifer C. ; Gould, Andrew ; Mao, Shude ; Zhang, Xiangyu ; Albrow, Michael D. ; Chung, Sun-Ju ; Han, Cheongho ; Jung, Youn Kil ; Ryu, Yoon-Hyun ; Shin, In-Gu ; Shvartzvald, Yossi ; Cha, Sang-Mok ; Kim, Dong-Jin ; Kim, Hyoun-Woo ; Kim, Seung-Lee ; Lee, Chung-Uk ; Lee, Dong-Joo ; Lee, Yongseok ; Park, Byeong-Gon ; Pogge, Richard W. ; Mróz, Przemek ; Skowron, Jan ; Poleski, Radoslaw ; Szymański, Michał K. ; Soszyński, Igor ; Pietrukowicz, Paweł ; Kozłowski, Szymon ; Ulaczyk, Krzysztof ; Rybicki, Krzysztof A. ; Iwanek, Patryk ; Wrona, Marcin ; Gromadzki, Mariusz ; Bond, Ian A. ; Abe, Fumio ; Barry, Richard ; Bennett, David P. ; Bhattacharya, Aparna ; Donachie, Martin ; Fujii, Hirosane ; Fukui, Akihiko ; Hirao, Yuki ; Itow, Yoshitaka ; Kirikawa, Rintaro ; Kondo, Iona ; Koshimoto, Naoki ; Li, Man Cheung Alex ; Matsubara, Yutaka ; Muraki, Yasushi ; Miyazaki, Shota ; Olmschenk, Greg ; Ranc, Clément ; Rattenbury, Nicholas J. ; Satoh, Yuki ; Shoji, Hikaru ; Ishitani Silva, Stela ; Suzuki, Daisuke ; Tanaka, Yuzuru ; Tristram, Paul J. ; Yamawaki, Tsubasa ; Yonehara, Atsunori ; Beichman, Charles A. ; Bryden, Geoffery ; Calchi Novati, Sebastiano ; Carey, Sean ; Gaudi, B. Scott ; Henderson, Calen B. ; Johnson, Samson ; The Spitzer Team ; The OGLE Collaboration ; Leading Authors ; The MOA Collaboration ; The KMTNet Collaboration</creatorcontrib><description>In order to exhume the buried signatures of “missing planetary caustics” in Korea Microlensing Telescope Network (KMTNet) data, we conducted a systematic anomaly search of the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search revealed the lowest-mass-ratio planetary caustic to date in the microlensing event OGLE-2019-BLG-1053, for which the planetary signal had not been noticed before. The planetary system has a planet–host mass ratio of q = (1.25 ± 0.13) × 10 −5 . A Bayesian analysis yielded estimates of the mass of the host star, M host = 0.61 − 0.24 + 0.29 M ⊙ , the mass of its planet, M planet = 2.48 − 0.98 + 1.19 M ⊕ , the projected planet–host separation, a ⊥ = 3.4 − 0.5 + 0.5 au, and the lens distance, D L = 6.8 − 0.9 + 0.6 kpc. The discovery of this very-low-mass-ratio planet illustrates the utility of our method and opens a new window for a large and homogeneous sample to study the microlensing planet–host mass ratio function down to q ∼ 10 −5 .</description><identifier>ISSN: 0004-6256</identifier><identifier>ISSN: 1538-3881</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.3847/1538-3881/ac12d4</identifier><language>eng</language><publisher>Madison: The American Astronomical Society</publisher><subject>ALGORITHMS ; Astronomy ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Bayesian analysis ; Exoplanet detection methods ; Gravitational microlensing exoplanet detection ; Lenses ; Microlenses ; OTHER INSTRUMENTATION ; Planetary systems ; PLANETS ; POINT SOURCES ; Searching ; SIGNALS ; STARS ; TELESCOPES ; Terrestrial environments ; Terrestrial planets</subject><ispartof>The Astronomical journal, 2021-10, Vol.162 (4), p.163</ispartof><rights>2021. The American Astronomical Society. 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Scott</creatorcontrib><creatorcontrib>Henderson, Calen B.</creatorcontrib><creatorcontrib>Johnson, Samson</creatorcontrib><creatorcontrib>The Spitzer Team</creatorcontrib><creatorcontrib>The OGLE Collaboration</creatorcontrib><creatorcontrib>Leading Authors</creatorcontrib><creatorcontrib>The MOA Collaboration</creatorcontrib><creatorcontrib>The KMTNet Collaboration</creatorcontrib><title>Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet</title><title>The Astronomical journal</title><addtitle>AJ</addtitle><addtitle>Astron. J</addtitle><description>In order to exhume the buried signatures of “missing planetary caustics” in Korea Microlensing Telescope Network (KMTNet) data, we conducted a systematic anomaly search of the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search revealed the lowest-mass-ratio planetary caustic to date in the microlensing event OGLE-2019-BLG-1053, for which the planetary signal had not been noticed before. The planetary system has a planet–host mass ratio of q = (1.25 ± 0.13) × 10 −5 . A Bayesian analysis yielded estimates of the mass of the host star, M host = 0.61 − 0.24 + 0.29 M ⊙ , the mass of its planet, M planet = 2.48 − 0.98 + 1.19 M ⊕ , the projected planet–host separation, a ⊥ = 3.4 − 0.5 + 0.5 au, and the lens distance, D L = 6.8 − 0.9 + 0.6 kpc. The discovery of this very-low-mass-ratio planet illustrates the utility of our method and opens a new window for a large and homogeneous sample to study the microlensing planet–host mass ratio function down to q ∼ 10 −5 .</description><subject>ALGORITHMS</subject><subject>Astronomy</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Bayesian analysis</subject><subject>Exoplanet detection methods</subject><subject>Gravitational microlensing exoplanet detection</subject><subject>Lenses</subject><subject>Microlenses</subject><subject>OTHER INSTRUMENTATION</subject><subject>Planetary systems</subject><subject>PLANETS</subject><subject>POINT SOURCES</subject><subject>Searching</subject><subject>SIGNALS</subject><subject>STARS</subject><subject>TELESCOPES</subject><subject>Terrestrial environments</subject><subject>Terrestrial planets</subject><issn>0004-6256</issn><issn>1538-3881</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kM9PwjAYhhujiYjePTbxyqC_1x2BIBKnmIDn2nZdGIEN23Lgv3dkRE-evuTL87558wDwiNGQSpaOMKcyoVLikbaYFOwK9H5f16CHEGKJIFzcgrsQtghhLBHrga_VKUS317Gy8PVt_e4i_Njp2kXtT3BcN3u9O8GV095uhnAxhMt5PksIwlkyyecJRpzmZgA1nBx95Qq4dt67EH2ld5eee3BT6l1wD5fbB5_Ps_X0JcmX88V0nCeWMRYT4YxBUhiqEXUZ1pRlGJsCG1ESUtqUOIYZMkRk2BCOiOCiFLrMDOeWFlLQPnjqepsQKxVsFZ3d2KaunY2KUMwzKskfdfDN97FdqrbN0dftMEV4miKRZixtKdRR1jcheFeqg6_2rRGFkTrbVme16qxWdbbbyKCLVM3hr_Nf_AdDYnuJ</recordid><startdate>20211001</startdate><enddate>20211001</enddate><creator>Zang, Weicheng</creator><creator>Hwang, Kyu-Ha</creator><creator>Udalski, Andrzej</creator><creator>Wang, Tianshu</creator><creator>Zhu, Wei</creator><creator>Sumi, Takahiro</creator><creator>Yee, Jennifer C.</creator><creator>Gould, Andrew</creator><creator>Mao, Shude</creator><creator>Zhang, Xiangyu</creator><creator>Albrow, Michael D.</creator><creator>Chung, Sun-Ju</creator><creator>Han, Cheongho</creator><creator>Jung, Youn Kil</creator><creator>Ryu, Yoon-Hyun</creator><creator>Shin, In-Gu</creator><creator>Shvartzvald, Yossi</creator><creator>Cha, Sang-Mok</creator><creator>Kim, Dong-Jin</creator><creator>Kim, Hyoun-Woo</creator><creator>Kim, Seung-Lee</creator><creator>Lee, Chung-Uk</creator><creator>Lee, Dong-Joo</creator><creator>Lee, Yongseok</creator><creator>Park, Byeong-Gon</creator><creator>Pogge, Richard W.</creator><creator>Mróz, Przemek</creator><creator>Skowron, Jan</creator><creator>Poleski, Radoslaw</creator><creator>Szymański, Michał K.</creator><creator>Soszyński, Igor</creator><creator>Pietrukowicz, Paweł</creator><creator>Kozłowski, Szymon</creator><creator>Ulaczyk, Krzysztof</creator><creator>Rybicki, Krzysztof A.</creator><creator>Iwanek, Patryk</creator><creator>Wrona, Marcin</creator><creator>Gromadzki, Mariusz</creator><creator>Bond, Ian A.</creator><creator>Abe, Fumio</creator><creator>Barry, Richard</creator><creator>Bennett, David P.</creator><creator>Bhattacharya, Aparna</creator><creator>Donachie, Martin</creator><creator>Fujii, Hirosane</creator><creator>Fukui, Akihiko</creator><creator>Hirao, Yuki</creator><creator>Itow, Yoshitaka</creator><creator>Kirikawa, Rintaro</creator><creator>Kondo, Iona</creator><creator>Koshimoto, Naoki</creator><creator>Li, Man Cheung Alex</creator><creator>Matsubara, Yutaka</creator><creator>Muraki, Yasushi</creator><creator>Miyazaki, Shota</creator><creator>Olmschenk, Greg</creator><creator>Ranc, Clément</creator><creator>Rattenbury, Nicholas J.</creator><creator>Satoh, Yuki</creator><creator>Shoji, Hikaru</creator><creator>Ishitani Silva, Stela</creator><creator>Suzuki, Daisuke</creator><creator>Tanaka, Yuzuru</creator><creator>Tristram, Paul J.</creator><creator>Yamawaki, Tsubasa</creator><creator>Yonehara, Atsunori</creator><creator>Beichman, Charles A.</creator><creator>Bryden, Geoffery</creator><creator>Calchi Novati, Sebastiano</creator><creator>Carey, Sean</creator><creator>Gaudi, B. 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I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet</title><author>Zang, Weicheng ; Hwang, Kyu-Ha ; Udalski, Andrzej ; Wang, Tianshu ; Zhu, Wei ; Sumi, Takahiro ; Yee, Jennifer C. ; Gould, Andrew ; Mao, Shude ; Zhang, Xiangyu ; Albrow, Michael D. ; Chung, Sun-Ju ; Han, Cheongho ; Jung, Youn Kil ; Ryu, Yoon-Hyun ; Shin, In-Gu ; Shvartzvald, Yossi ; Cha, Sang-Mok ; Kim, Dong-Jin ; Kim, Hyoun-Woo ; Kim, Seung-Lee ; Lee, Chung-Uk ; Lee, Dong-Joo ; Lee, Yongseok ; Park, Byeong-Gon ; Pogge, Richard W. ; Mróz, Przemek ; Skowron, Jan ; Poleski, Radoslaw ; Szymański, Michał K. ; Soszyński, Igor ; Pietrukowicz, Paweł ; Kozłowski, Szymon ; Ulaczyk, Krzysztof ; Rybicki, Krzysztof A. ; Iwanek, Patryk ; Wrona, Marcin ; Gromadzki, Mariusz ; Bond, Ian A. ; Abe, Fumio ; Barry, Richard ; Bennett, David P. ; Bhattacharya, Aparna ; Donachie, Martin ; Fujii, Hirosane ; Fukui, Akihiko ; Hirao, Yuki ; Itow, Yoshitaka ; Kirikawa, Rintaro ; Kondo, Iona ; Koshimoto, Naoki ; Li, Man Cheung Alex ; Matsubara, Yutaka ; Muraki, Yasushi ; Miyazaki, Shota ; Olmschenk, Greg ; Ranc, Clément ; Rattenbury, Nicholas J. ; Satoh, Yuki ; Shoji, Hikaru ; Ishitani Silva, Stela ; Suzuki, Daisuke ; Tanaka, Yuzuru ; Tristram, Paul J. ; Yamawaki, Tsubasa ; Yonehara, Atsunori ; Beichman, Charles A. ; Bryden, Geoffery ; Calchi Novati, Sebastiano ; Carey, Sean ; Gaudi, B. Scott ; Henderson, Calen B. ; Johnson, Samson</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c444t-6ebb086b3a03e91a34911bd1b6f22fc72e4140b2691b2502656f6af9b55c3d863</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>ALGORITHMS</topic><topic>Astronomy</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>Bayesian analysis</topic><topic>Exoplanet detection methods</topic><topic>Gravitational microlensing exoplanet detection</topic><topic>Lenses</topic><topic>Microlenses</topic><topic>OTHER INSTRUMENTATION</topic><topic>Planetary systems</topic><topic>PLANETS</topic><topic>POINT SOURCES</topic><topic>Searching</topic><topic>SIGNALS</topic><topic>STARS</topic><topic>TELESCOPES</topic><topic>Terrestrial environments</topic><topic>Terrestrial planets</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zang, Weicheng</creatorcontrib><creatorcontrib>Hwang, Kyu-Ha</creatorcontrib><creatorcontrib>Udalski, Andrzej</creatorcontrib><creatorcontrib>Wang, Tianshu</creatorcontrib><creatorcontrib>Zhu, Wei</creatorcontrib><creatorcontrib>Sumi, Takahiro</creatorcontrib><creatorcontrib>Yee, Jennifer C.</creatorcontrib><creatorcontrib>Gould, Andrew</creatorcontrib><creatorcontrib>Mao, Shude</creatorcontrib><creatorcontrib>Zhang, Xiangyu</creatorcontrib><creatorcontrib>Albrow, Michael D.</creatorcontrib><creatorcontrib>Chung, Sun-Ju</creatorcontrib><creatorcontrib>Han, Cheongho</creatorcontrib><creatorcontrib>Jung, Youn Kil</creatorcontrib><creatorcontrib>Ryu, Yoon-Hyun</creatorcontrib><creatorcontrib>Shin, In-Gu</creatorcontrib><creatorcontrib>Shvartzvald, Yossi</creatorcontrib><creatorcontrib>Cha, Sang-Mok</creatorcontrib><creatorcontrib>Kim, Dong-Jin</creatorcontrib><creatorcontrib>Kim, Hyoun-Woo</creatorcontrib><creatorcontrib>Kim, Seung-Lee</creatorcontrib><creatorcontrib>Lee, Chung-Uk</creatorcontrib><creatorcontrib>Lee, Dong-Joo</creatorcontrib><creatorcontrib>Lee, Yongseok</creatorcontrib><creatorcontrib>Park, Byeong-Gon</creatorcontrib><creatorcontrib>Pogge, Richard W.</creatorcontrib><creatorcontrib>Mróz, Przemek</creatorcontrib><creatorcontrib>Skowron, Jan</creatorcontrib><creatorcontrib>Poleski, Radoslaw</creatorcontrib><creatorcontrib>Szymański, Michał K.</creatorcontrib><creatorcontrib>Soszyński, Igor</creatorcontrib><creatorcontrib>Pietrukowicz, Paweł</creatorcontrib><creatorcontrib>Kozłowski, Szymon</creatorcontrib><creatorcontrib>Ulaczyk, Krzysztof</creatorcontrib><creatorcontrib>Rybicki, Krzysztof A.</creatorcontrib><creatorcontrib>Iwanek, Patryk</creatorcontrib><creatorcontrib>Wrona, Marcin</creatorcontrib><creatorcontrib>Gromadzki, Mariusz</creatorcontrib><creatorcontrib>Bond, Ian A.</creatorcontrib><creatorcontrib>Abe, Fumio</creatorcontrib><creatorcontrib>Barry, Richard</creatorcontrib><creatorcontrib>Bennett, David P.</creatorcontrib><creatorcontrib>Bhattacharya, Aparna</creatorcontrib><creatorcontrib>Donachie, Martin</creatorcontrib><creatorcontrib>Fujii, Hirosane</creatorcontrib><creatorcontrib>Fukui, Akihiko</creatorcontrib><creatorcontrib>Hirao, Yuki</creatorcontrib><creatorcontrib>Itow, Yoshitaka</creatorcontrib><creatorcontrib>Kirikawa, Rintaro</creatorcontrib><creatorcontrib>Kondo, Iona</creatorcontrib><creatorcontrib>Koshimoto, Naoki</creatorcontrib><creatorcontrib>Li, Man Cheung Alex</creatorcontrib><creatorcontrib>Matsubara, Yutaka</creatorcontrib><creatorcontrib>Muraki, Yasushi</creatorcontrib><creatorcontrib>Miyazaki, Shota</creatorcontrib><creatorcontrib>Olmschenk, Greg</creatorcontrib><creatorcontrib>Ranc, Clément</creatorcontrib><creatorcontrib>Rattenbury, Nicholas J.</creatorcontrib><creatorcontrib>Satoh, Yuki</creatorcontrib><creatorcontrib>Shoji, Hikaru</creatorcontrib><creatorcontrib>Ishitani Silva, Stela</creatorcontrib><creatorcontrib>Suzuki, Daisuke</creatorcontrib><creatorcontrib>Tanaka, Yuzuru</creatorcontrib><creatorcontrib>Tristram, Paul J.</creatorcontrib><creatorcontrib>Yamawaki, Tsubasa</creatorcontrib><creatorcontrib>Yonehara, Atsunori</creatorcontrib><creatorcontrib>Beichman, Charles A.</creatorcontrib><creatorcontrib>Bryden, Geoffery</creatorcontrib><creatorcontrib>Calchi Novati, Sebastiano</creatorcontrib><creatorcontrib>Carey, Sean</creatorcontrib><creatorcontrib>Gaudi, B. Scott</creatorcontrib><creatorcontrib>Henderson, Calen B.</creatorcontrib><creatorcontrib>Johnson, Samson</creatorcontrib><creatorcontrib>The Spitzer Team</creatorcontrib><creatorcontrib>The OGLE Collaboration</creatorcontrib><creatorcontrib>Leading Authors</creatorcontrib><creatorcontrib>The MOA Collaboration</creatorcontrib><creatorcontrib>The KMTNet Collaboration</creatorcontrib><collection>CrossRef</collection><collection>Meteorological &amp; Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological &amp; Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Zang, Weicheng</au><au>Hwang, Kyu-Ha</au><au>Udalski, Andrzej</au><au>Wang, Tianshu</au><au>Zhu, Wei</au><au>Sumi, Takahiro</au><au>Yee, Jennifer C.</au><au>Gould, Andrew</au><au>Mao, Shude</au><au>Zhang, Xiangyu</au><au>Albrow, Michael D.</au><au>Chung, Sun-Ju</au><au>Han, Cheongho</au><au>Jung, Youn Kil</au><au>Ryu, Yoon-Hyun</au><au>Shin, In-Gu</au><au>Shvartzvald, Yossi</au><au>Cha, Sang-Mok</au><au>Kim, Dong-Jin</au><au>Kim, Hyoun-Woo</au><au>Kim, Seung-Lee</au><au>Lee, Chung-Uk</au><au>Lee, Dong-Joo</au><au>Lee, Yongseok</au><au>Park, Byeong-Gon</au><au>Pogge, Richard W.</au><au>Mróz, Przemek</au><au>Skowron, Jan</au><au>Poleski, Radoslaw</au><au>Szymański, Michał K.</au><au>Soszyński, Igor</au><au>Pietrukowicz, Paweł</au><au>Kozłowski, Szymon</au><au>Ulaczyk, Krzysztof</au><au>Rybicki, Krzysztof A.</au><au>Iwanek, Patryk</au><au>Wrona, Marcin</au><au>Gromadzki, Mariusz</au><au>Bond, Ian A.</au><au>Abe, Fumio</au><au>Barry, Richard</au><au>Bennett, David P.</au><au>Bhattacharya, Aparna</au><au>Donachie, Martin</au><au>Fujii, Hirosane</au><au>Fukui, Akihiko</au><au>Hirao, Yuki</au><au>Itow, Yoshitaka</au><au>Kirikawa, Rintaro</au><au>Kondo, Iona</au><au>Koshimoto, Naoki</au><au>Li, Man Cheung Alex</au><au>Matsubara, Yutaka</au><au>Muraki, Yasushi</au><au>Miyazaki, Shota</au><au>Olmschenk, Greg</au><au>Ranc, Clément</au><au>Rattenbury, Nicholas J.</au><au>Satoh, Yuki</au><au>Shoji, Hikaru</au><au>Ishitani Silva, Stela</au><au>Suzuki, Daisuke</au><au>Tanaka, Yuzuru</au><au>Tristram, Paul J.</au><au>Yamawaki, Tsubasa</au><au>Yonehara, Atsunori</au><au>Beichman, Charles A.</au><au>Bryden, Geoffery</au><au>Calchi Novati, Sebastiano</au><au>Carey, Sean</au><au>Gaudi, B. Scott</au><au>Henderson, Calen B.</au><au>Johnson, Samson</au><aucorp>The Spitzer Team</aucorp><aucorp>The OGLE Collaboration</aucorp><aucorp>Leading Authors</aucorp><aucorp>The MOA Collaboration</aucorp><aucorp>The KMTNet Collaboration</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet</atitle><jtitle>The Astronomical journal</jtitle><stitle>AJ</stitle><addtitle>Astron. J</addtitle><date>2021-10-01</date><risdate>2021</risdate><volume>162</volume><issue>4</issue><spage>163</spage><pages>163-</pages><issn>0004-6256</issn><issn>1538-3881</issn><eissn>1538-3881</eissn><abstract>In order to exhume the buried signatures of “missing planetary caustics” in Korea Microlensing Telescope Network (KMTNet) data, we conducted a systematic anomaly search of the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search revealed the lowest-mass-ratio planetary caustic to date in the microlensing event OGLE-2019-BLG-1053, for which the planetary signal had not been noticed before. The planetary system has a planet–host mass ratio of q = (1.25 ± 0.13) × 10 −5 . A Bayesian analysis yielded estimates of the mass of the host star, M host = 0.61 − 0.24 + 0.29 M ⊙ , the mass of its planet, M planet = 2.48 − 0.98 + 1.19 M ⊕ , the projected planet–host separation, a ⊥ = 3.4 − 0.5 + 0.5 au, and the lens distance, D L = 6.8 − 0.9 + 0.6 kpc. The discovery of this very-low-mass-ratio planet illustrates the utility of our method and opens a new window for a large and homogeneous sample to study the microlensing planet–host mass ratio function down to q ∼ 10 −5 .</abstract><cop>Madison</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-3881/ac12d4</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0002-4035-5012</orcidid><orcidid>https://orcid.org/0000-0003-4084-880X</orcidid><orcidid>https://orcid.org/0000-0002-4909-5763</orcidid><orcidid>https://orcid.org/0000-0002-7669-1069</orcidid><orcidid>https://orcid.org/0000-0001-7016-1692</orcidid><orcidid>https://orcid.org/0000-0001-9818-1513</orcidid><orcidid>https://orcid.org/0000-0003-4776-8618</orcidid><orcidid>https://orcid.org/0000-0001-6364-408X</orcidid><orcidid>https://orcid.org/0000-0002-0548-8995</orcidid><orcidid>https://orcid.org/0000-0003-3316-4012</orcidid><orcidid>https://orcid.org/0000-0002-9245-6368</orcidid><orcidid>https://orcid.org/0000-0003-1435-3053</orcidid><orcidid>https://orcid.org/0000-0003-0395-9869</orcidid><orcidid>https://orcid.org/0000-0001-5207-5619</orcidid><orcidid>https://orcid.org/0000-0003-1525-5041</orcidid><orcidid>https://orcid.org/0000-0001-8263-1006</orcidid><orcidid>https://orcid.org/0000-0002-3401-1029</orcidid><orcidid>https://orcid.org/0000-0003-0043-3925</orcidid><orcidid>https://orcid.org/0000-0002-1650-1518</orcidid><orcidid>https://orcid.org/0000-0001-8317-2788</orcidid><orcidid>https://orcid.org/0000-0002-2641-9964</orcidid><orcidid>https://orcid.org/0000-0001-9397-4768</orcidid><orcidid>https://orcid.org/0000-0001-8877-9060</orcidid><orcidid>https://orcid.org/0000-0001-6000-3463</orcidid><orcidid>https://orcid.org/0000-0001-8043-8413</orcidid><orcidid>https://orcid.org/0000-0003-2388-4534</orcidid><orcidid>https://orcid.org/0000-0002-6982-7722</orcidid><orcidid>https://orcid.org/0000-0001-9823-2907</orcidid><orcidid>https://orcid.org/0000-0002-9241-4117</orcidid><orcidid>https://orcid.org/0000-0001-5966-837X</orcidid><orcidid>https://orcid.org/0000-0001-5069-319X</orcidid><orcidid>https://orcid.org/0000-0002-0314-6000</orcidid><orcidid>https://orcid.org/0000-0002-6212-7221</orcidid><orcidid>https://orcid.org/0000-0001-9481-7123</orcidid><orcidid>https://orcid.org/0000-0002-5843-9433</orcidid><orcidid>https://orcid.org/0000-0003-4027-4711</orcidid><orcidid>https://orcid.org/0000-0003-4916-0892</orcidid><orcidid>https://orcid.org/0000-0001-6285-4528</orcidid><orcidid>https://orcid.org/0000-0002-2339-5899</orcidid><orcidid>https://orcid.org/0000-0003-2302-9562</orcidid><orcidid>https://orcid.org/0000-0003-0562-5643</orcidid><orcidid>https://orcid.org/0000-0002-4355-9838</orcidid><orcidid>https://orcid.org/0000-0002-3051-274X</orcidid><orcidid>https://orcid.org/0000-0002-8198-1968</orcidid><orcidid>https://orcid.org/0000-0001-8472-2219</orcidid><orcidid>https://orcid.org/0000-0002-7777-0842</orcidid><orcidid>https://orcid.org/0000-0002-0221-6871</orcidid><orcidid>https://orcid.org/0000-0003-1978-2092</orcidid><orcidid>https://orcid.org/0000-0002-2335-1730</orcidid><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0004-6256
ispartof The Astronomical journal, 2021-10, Vol.162 (4), p.163
issn 0004-6256
1538-3881
1538-3881
language eng
recordid cdi_iop_journals_10_3847_1538_3881_ac12d4
source IOP Publishing Free Content
subjects ALGORITHMS
Astronomy
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Bayesian analysis
Exoplanet detection methods
Gravitational microlensing exoplanet detection
Lenses
Microlenses
OTHER INSTRUMENTATION
Planetary systems
PLANETS
POINT SOURCES
Searching
SIGNALS
STARS
TELESCOPES
Terrestrial environments
Terrestrial planets
title Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet
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