KMT-2021-BLG-1077L: The fifth confirmed multiplanetary system detected by microlensing
/ Authors
C. Han, A. Gould, I. Bond, Y. Jung, M. Albrow, S. Chung, K. Hwang, Y. Ryu, I. Shin, Y. Shvartzvald
and 38 more authors
J. Yee, W. Zang, S. Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, B.-G. Park, R. Pogge, Doeon Kim, F. Abe, R. Barry, D. Bennett, A. Bhattacharya, H. Fujii, A. Fukui, Y. Hirao, Y. Itow, R. Kirikawa, N. Koshimoto, I. Kondo, Y. Matsubara, Sho Matsumoto, S. Miyazaki, Y. Muraki, G. Olmschenk, A. Okamura, C. Ranc, N. Rattenbury, Y. Satoh, Stela Ishitani Silva, T. Sumi, D. Suzuki, T. Toda, P. Tristram, A. Vandorou, H. Yama
/ Abstract
Aims. The high-magnification microlensing event KMT-2021-BLG-1077 exhibits a subtle and complex anomaly pattern in the region around the peak. We analyze the lensing light curve of the event with the aim of revealing the nature of the anomaly. We test various models in combination with several interpretations: that the lens is a binary (2L1S), the source is a binary (1L2S), both the lens and source are binaries (2L2S), or the lens is a triple system (3L1S). We search for the best-fit models under the individual interpretations of the lens and source systems. OGLE-2018-BLG-1011L, and OGLE-2019-BLG-0468L.
Journal: Astronomy & Astrophysics