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KMT-2019-BLG-1715: Planetary Microlensing Event with Three Lens Masses and Two Source Stars

Han, Cheongho and Udalski, Andrzej and Kim, Doeone and Jung, Youn Kil and Lee, Chung-Uk and Bond, Ian A. and Albrow, Michael D. and Chung, Sun-Ju and Gould, Andrew and Hwang, Kyu-Ha and Kim, Hyoun-Woo and Ryu, Yoon-Hyun and Shin, In-Gu and Shvartzvald, Yossi and Zang, Weicheng and Yee, Jennifer C. and Cha, Sang-Mok and Kim, Dong-Jin and Kim, Seung-Lee and Lee, Dong-Joo and Lee, Yongseok and Park, Byeong-Gon and Pogge, Richard W. and Kim, Chun-Hwey and Kim, Woong-Tae and Mróz, Przemek and Szymański, Michał K. and Skowron, Jan and Poleski, Radek and Soszyński, Igor and Pietrukowicz, Paweł and Kozłowski, Szymon and Ulaczyk, Krzysztof and Rybicki, Krzysztof A. and Iwanek, Patryk and Wrona, Marcin and Gromadzki, Mariusz and Abe, Fumio and Barry, Richard and Bennett, David P. and Bhattacharya, Aparna and Donachie, Martin and Fujii, Hirosane and Fukui, Akihiko and Itow, Yoshitaka and Hirao, Yuki and Kirikawa, Rintaro and Kondo, Iona and Li, Man Cheung Alex and Matsubara, Yutaka and Muraki, Yasushi and Miyazaki, Shota and Ranc, Clément and Rattenbury, Nicholas J. and Satoh, Yuki and Shoji, Hikaru and Suematsu, Haruno and Sumi, Takahiro and Suzuki, Daisuke and Tanaka, Yuzuru and Tristram, Paul J. and Yamakawa, Takeharu and Yamawaki, Tsubasa and Yonehara, Atsunori (2021) KMT-2019-BLG-1715: Planetary Microlensing Event with Three Lens Masses and Two Source Stars. Astronomical Journal, 161 (6). Art. No. 270. ISSN 1538-3881. doi:10.3847/1538-3881/abf4d0.

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We investigate the gravitational microlensing event KMT-2019-BLG-1715, the light curve of which shows two short-term anomalies from a caustic-crossing binary-lensing light curve: one with a large deviation and the other with a small deviation. We identify five pairs of solutions, in which the anomalies are explained by adding an extra lens or source component in addition to the base binary-lens model. We resolve the degeneracies by applying a method in which the measured flux ratio between the first and second source stars is compared with the flux ratio deduced from the ratio of the source radii. Applying this method leaves a single pair of viable solutions, in both of which the major anomaly is generated by a planetary-mass third body of the lens, and the minor anomaly is generated by a faint second source. A Bayesian analysis indicates that the lens comprises three masses: a planet-mass object with ~2.6 M_J and binary stars of K and M dwarfs lying in the galactic disk. We point out the possibility that the lens is the blend, and this can be verified by conducting high-resolution follow-up imaging for the resolution of the lens from the source.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Han, Cheongho0000-0002-2641-9964
Udalski, Andrzej0000-0001-5207-5619
Jung, Youn Kil0000-0002-0314-6000
Lee, Chung-Uk0000-0003-0043-3925
Albrow, Michael D.0000-0003-3316-4012
Chung, Sun-Ju0000-0001-6285-4528
Hwang, Kyu-Ha0000-0002-9241-4117
Kim, Hyoun-Woo0000-0001-8263-1006
Ryu, Yoon-Hyun0000-0001-9823-2907
Shin, In-Gu0000-0002-4355-9838
Shvartzvald, Yossi0000-0003-1525-5041
Zang, Weicheng0000-0001-6000-3463
Yee, Jennifer C.0000-0001-9481-7123
Cha, Sang-Mok0000-0002-7511-2950
Kim, Dong-Jin0000-0002-7038-2118
Kim, Seung-Lee0000-0003-0562-5643
Lee, Yongseok0000-0001-7594-8072
Park, Byeong-Gon0000-0002-6982-7722
Pogge, Richard W.0000-0003-1435-3053
Kim, Chun-Hwey0000-0001-8591-4562
Kim, Woong-Tae0000-0003-4625-229X
Mróz, Przemek0000-0001-7016-1692
Szymański, Michał K.0000-0002-0548-8995
Skowron, Jan0000-0002-2335-1730
Poleski, Radek0000-0002-9245-6368
Soszyński, Igor0000-0002-7777-0842
Pietrukowicz, Paweł0000-0002-2339-5899
Kozłowski, Szymon0000-0003-4084-880X
Ulaczyk, Krzysztof0000-0001-6364-408X
Rybicki, Krzysztof A.0000-0002-9326-9329
Iwanek, Patryk0000-0002-6212-7221
Wrona, Marcin0000-0002-3051-274X
Gromadzki, Mariusz0000-0002-1650-1518
Barry, Richard0000-0003-4916-0892
Bennett, David P.0000-0001-8043-8413
Fukui, Akihiko0000-0002-4909-5763
Itow, Yoshitaka0000-0002-8198-1968
Kondo, Iona0000-0002-3401-1029
Muraki, Yasushi0000-0003-1978-2092
Miyazaki, Shota0000-0001-9818-1513
Ranc, Clément0000-0003-2388-4534
Rattenbury, Nicholas J.0000-0001-5069-319X
Suzuki, Daisuke0000-0002-5843-9433
Yonehara, Atsunori0000-0003-3480-0973
Additional Information:© 2021. The American Astronomical Society. Received 2021 January 4; revised 2021 March 30; accepted 2021 March 31; published 2021 May 19. Work by C.H. was supported by grants from the National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965) Work by A.G. was supported by JPL grant 1500811. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A.U. The MOA project was supported by grants 19KK0082 and 20H04754. Work by Y.H. was supported by JSPS KAKENHI grant No. 17J02146. D.P.B., A.B., and C.R. were supported by NASA through grant NASA-80NSSC18K0274. Work by N.K. was supported by JSPS KAKENHI grant No. JP18J008. Work by C.R. was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by USRA through a contract with NASA. This research has made use of the KMTNet system operated by the Korea Astronomy and Space Science Institute (KASI) and the data were obtained at three host sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia.
Funding AgencyGrant Number
National Research Foundation of Korea2020R1A4A2002885
National Research Foundation of Korea2019R1A2C2085965
National Science Centre (Poland)MAESTRO 2014/14/A/ST9/00121
Japan Society for the Promotion of Science (JSPS)19KK0082
Japan Society for the Promotion of Science (JSPS)20H04754
Japan Society for the Promotion of Science (JSPS)17J02146
Japan Society for the Promotion of Science (JSPS)JP18J008
NASA Postdoctoral ProgramUNSPECIFIED
Subject Keywords:Gravitational microlensing exoplanet detection
Issue or Number:6
Classification Code:Unified Astronomy Thesaurus concepts: Gravitational microlensing exoplanet detection (2147)
Record Number:CaltechAUTHORS:20210409-141511091
Persistent URL:
Official Citation:Cheongho Han et al 2021 AJ 161 270
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108679
Deposited By: Tony Diaz
Deposited On:12 Apr 2021 01:26
Last Modified:26 May 2021 16:46

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