Exoplanets in the Antarctic Sky I. The first data release of AST3-II (CHESPA) and new found variables within the southern CVZ of TESS
Article
Article Title | Exoplanets in the Antarctic Sky I. The first data release of AST3-II (CHESPA) and new found variables within the southern CVZ of TESS |
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ERA Journal ID | 1058 |
Article Category | Article |
Authors | Zhang, Hui (Author), Yu, Zhouyi (Author), Liang, Ensi (Author), Yang, Ming (Author), Ashley, Michael C.B. (Author), Cui, Xiangqun (Author), Du, Fujia (Author), Fu, Jianning (Author), Gong, Xuefei (Author), Gu, Bozhong (Author), Hu, Yi (Author), Jiang, Peng (Author), Liu, Huigen (Author), Lawrence, Jon (Author), Liu, Qiang (Author), Li, Xiaoyan (Author), Li, Zhengyang (Author), Ma, Bin (Author), Mould, Jeremy (Author), Shang, Zhaohui (Author), Suntzeff, Nicholas B. (Author), Tao, Charling (Author), Tian, Qiguo (Author), Tinney, C. G. (Author), Uddin, Syed A. (Author), Wang, Lifan (Author), Wang, Songhu (Author), Wang, Xiaofeng (Author), Wei, Peng (Author), Wright, Duncan (Author), Wu, Xuefeng (Author), Wittenmyer, Robert A. (Author), Xu, Lingzhe (Author), Yang, Shi-hai (Author), Yu, Ce (Author), Yuan, Xiangyan (Author), Zheng, Jessica (Author), Zhou, Hongyan (Author), Zhou, Ji-lin (Author) and Zhu, Zhenxi (Author) |
Journal Title | Astrophysical Journal Supplement Series |
Journal Citation | 240 (2), pp. 1-32 |
Article Number | 16 |
Number of Pages | 32 |
Year | 2019 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0067-0049 |
1538-4365 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-4365/aaec0c |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-4365/aaec0c |
Abstract | Located at Dome A, the highest point of the Antarctic plateau, the Chinese Kunlun station is considered to be one of the best ground-based photometric sites because of its extremely cold, dry, and stable atmosphere. A target can be monitored from there for over 40 days without diurnal interruption during a polar winter. This makes Kunlun station a perfect site to search for short-period transiting exoplanets. Since 2008, an observatory has existed at Kunlun station, and three telescopes are working there. Using these telescopes, the AST3 project has been carried out over the last 6 yr with a search for transiting exoplanets as one of its key programs (CHESPA). In the austral winters of 2016 and 2017, a set of target fields in the southern continuous viewing zone (CVZ) of TESS were monitored by the AST3-II telescope. In this paper, we introduce the CHESPA and present the first data release containing photometry of 26,578 bright stars (m(i) <= 15). The best photometric precision at the optimum magnitude for the survey is around 2 mmag. To demonstrate the data quality, we also present a catalog of 221 variables with a brightness variation greater than 5 mmag from the 2016 data. Among these variables, 179 are newly identified periodic variables not listed in the AAVSO database (https://www.aavso.org/), and 67 are listed in the Candidate Target List. These variables will require careful attention to avoid false-positive signals when searching for transiting exoplanets. Dozens of new transiting exoplanet candidates will be released in a subsequent paper. |
Keywords | binaries, eclipsing, catalogs, planets and satellites, detection, stars, variables, surveys, photometric |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | Nanjing University, China |
University of New South Wales | |
Nanjing Institute of Astronomical Optics and Technology, China | |
Beijing Normal University, China | |
Chinese Center for Antarctic Astronomy, China | |
Polar Research Institute of China, China | |
Macquarie University | |
Chinese Academy of Sciences, China | |
Swinburne University of Technology | |
Texas A&M University, United States | |
Aix-Marseille University, France | |
Purple Mountain Observatory, China | |
Yale University, United States | |
Tsinghua University, China | |
Computational Engineering and Science Research Centre | |
Tianjin University, China | |
Australian Astronomical Observatory, Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q55qx/exoplanets-in-the-antarctic-sky-i-the-first-data-release-of-ast3-ii-chespa-and-new-found-variables-within-the-southern-cvz-of-tess
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