Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of A Long-term Asymmetric Perturbation
Abstract
In the process of analyzing an observed light curve, one often confronts various scenarios that can mimic the planetary signals causing difficulties in the accurate interpretation of the lens system. In this paper, we present the analysis of the microlensing event OGLE-2016-BLG-0733. The light curve of the event shows a long-term asymmetric perturbation that would appear to be due to a planet. From the detailed modeling of the lensing light curve, however, we find that the perturbation originates from the binarity of the source rather than the lens. This result demonstrates that binary sources with roughly equal-luminosity components can mimic long-term perturbations induced by planets with projected separations near the Einstein ring. The result also represents the importance of the consideration of various interpretations in planet-like perturbations and of high-cadence observations for ensuring the unambiguous detection of the planet.
Cite
@article{arxiv.1611.00775,
title = {Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of A Long-term Asymmetric Perturbation},
author = {Y. K. Jung and A. Udalski and J. C. Yee and T. Sumi and A. Gould and C. Han and M. D. Albrow and C. -U. Lee and S. -L. Kim and S. -J. Chung and K. -H. Hwang and Y. -H. Ryu and I. -G. Shin and W. Zhu and S. -M. Cha and D. -J. Kim and Y. Lee and B. -G. Park and R. W. Pogge and P. Pietrukowicz and S. Kozlowski and R. Poleski and J. Skowron and P. Mroz and M. K. Szymanski and I. Soszynski and M. Pawlak and K. Ulaczyk and F. Abe and D. P. Bennett and R. Barry and I. A. Bond and Y. Asakura and A. Bhattacharya and M. Donachie and M. Freeman and A. Fukui and Y. Hirao and Y. Itow and N. Koshimoto and M. C. A. Li and C. H. Ling and K. Masuda and Y. Matsubara and Y. Muraki and M. Nagakane and H. Oyokawa and A. Sharan and D. J. Sullivan and D. Suzuki and P. J. Tristram and T. Yamada and T. Yamada and A. Yonehara},
journal= {arXiv preprint arXiv:1611.00775},
year = {2017}
}
Comments
7 pages, 1 tables, 7 figures, Accepted to AJ