OGLE-2016-BLG-1003: First Resolved Caustic-crossing Binary-source Event Discovered by Second-generation Microlensing Surveys
Abstract
We report the analysis of the first resolved caustic-crossing binary-source microlensing event OGLE-2016-BLG-1003. The event is densely covered by the round-the-clock observations of three surveys. The light curve is characterized by two nested caustic-crossing features, which is unusual for typical caustic-crossing perturbations. From the modeling of the light curve, we find that the anomaly is produced by a binary source passing over a caustic formed by a binary lens. The result proves the importance of high-cadence and continuous observations, and the capability of second-generation microlensing experiments to identify such complex perturbations that are previously unknown. However, the result also raises the issues of the limitations of current analysis techniques for understanding lens systems beyond two masses and of determining the appropriate multiband observing strategy of survey experiments.
Keywords
Cite
@article{arxiv.1705.01531,
title = {OGLE-2016-BLG-1003: First Resolved Caustic-crossing Binary-source Event Discovered by Second-generation Microlensing Surveys},
author = {Y. K. Jung and A. Udalski and I. A. Bond and J. C. Yee and A. Gould and C. Han and M. D. Albrow and C. -U. Lee and S. -L. Kim and K. -H. Hwang and S. -J. Chung 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 J. Skowron and M. K. Szymanski and R. Poleski and P. Mroz and S. Kozlowski and P. Pietrukowicz and I. Soszynski and K. Ulaczyk and M. Pawlak and F. Abe and D. P. Bennett and R. Barry and T. Sumi and Y. Asakura and A. Bhattacharya and M. Donachie 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 N. J. Rattenbury and P. Evans 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:1705.01531},
year = {2017}
}
Comments
7 pages, 6 figures, Accepted for the publication in ApJ