Exoplanets in the Antarctic Sky. III. Stellar Flares Found by AST3-II (CHESPA) within the Southern CVZ of TESS

The CHinense Exoplanet Searching Program from Antarctica is a ground-based wide-field photometric survey using the AST3 and CSTAR telescopes located at Dome A, Antarctica. Blessed with the unparalleled observing conditions on the highest point of the Antarctic plateau, three remotely controlled, ful...

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Bibliographic Details
Published in:The Astronomical journal 2020-05, Vol.159 (5), p.201
Main Authors: Liang, En-Si, Zhang, Hui, Yu, Zhouyi, Yang, Ming, Zhou, Ji-lin, Ashley, Michael C. B., Cui, Xiangqun, Du, Fujia, Fu, Jianning, Gong, Xuefei, Gu, Bozhong, Hu, Lei, Hu, Yi, Jiang, Peng, Liu, Huigen, Lawrence, Jon, Liu, Qiang, Li, Xiaoyan, Li, Zhengyang, Ma, Bin, Mould, Jeremy, Shang, Zhaohui, Sun, Tianrui, Suntzeff, Nicholas B., Tao, Charling, Tian, Qiguo, Tinney, C. G., Uddin, Syed A., Wang, Lifan, Wang, Songhu, Wang, Xiaofeng, Wei, Peng, Wright, Duncan, Wu, Xuefeng, Wittenmyer, Robert A., Xu, Lingzhe, Yang, Shihai, Yu, Ce, Yuan, Xiangyan, Zheng, Jessica, Zhou, Hongyan, Zhu, Zhenxi
Format: Article
Language:English
Subjects:
Astronomy
Astronomy data analysis
Astrostatistics
Automatic control
Extrasolar planets
Jupiter
Light curve
Photometry
Polar environments
Remote control
Remote observing
Sky surveys (astronomy)
Stellar activity
Stellar flares
Stellar models
Surveys
Telescopes
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Summary:The CHinense Exoplanet Searching Program from Antarctica is a ground-based wide-field photometric survey using the AST3 and CSTAR telescopes located at Dome A, Antarctica. Blessed with the unparalleled observing conditions on the highest point of the Antarctic plateau, three remotely controlled, fully automatic telescopes (AST3-I, AST3-II, and CSTAR-II) carried out continuous high-precision photometric surveys through the polar nights of 2016 and 2017. During the observing seasons of 2016, a total of 26,578 light curves were obtained for stars within the area of the southern continuous viewing zone of TESS, covering an i-band magnitude range from 7.5 to 15. At mi = 10, photometric precision reaches ∼2 mmag, allowing possible discoveries of sub-Jupiter-size exoplanets. Here we report 20 stellar flares with i-band energies larger than 1034 erg detected in the 2016 data set of AST3-II, all from different sources. We model the stellar flares and calculate the durations, amplitudes, energies, and skewnesses. The flare properties and the stellar properties of their sources are presented in this work.
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ab7ea8