分类： 天文学 >> 天文学 提交时间： 2023-02-19
Xu Yang
Yi Hu
Zhaohui Shang
Bin Ma
Michael C. B. Ashley
Xiangqun Cui
Fujia Du
Jianning Fu
Xuefei Gong
Bozhong Gu
Peng Jiang
Xiaoyan Li
Zhengyang Li
Charling Tao
Lifan Wang
Lingzhe Xu
Shi-hai Yang
Ce Yu
Xiangyan Yuan
Ji-lin Zhou
摘要： AST3-2 is the second of the three Antarctic Survey Telescopes, aimed at wide-field time-domain optical astronomy. It is located at Dome A, Antarctica, which is by many measures the best optical astronomy site on the Earth's surface. Here we present the data from the AST3-2 automatic survey in 2016 and the photometry results. The median 5$\sigma$ limiting magnitude in $i$-band is 17.8 mag and the light curve precision is 4 mmag for bright stars. The data release includes photometry for over 7~million stars, from which over 3,500 variable stars were detected, with 70 of them newly discovered. We classify these new variables into different types by combining their light curve features with stellar properties from surveys such as StarHorse.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Xu Yang
Yi Hu
Zhaohui Shang
Bin Ma
Michael C. B. Ashley
Xiangqun Cui
Fujia Du
Jianning Fu
Xuefei Gong
Bozhong Gu
Peng Jiang
Xiaoyan Li
Zhengyang Li
Charling Tao
Lifan Wang
Lingzhe Xu
Shi-hai Yang
Ce Yu
Xiangyan Yuan
Ji-lin Zhou
摘要： AST3-2 is the second of the three Antarctic Survey Telescopes, aimed at wide-field time-domain optical astronomy. It is located at Dome A, Antarctica, which is by many measures the best optical astronomy site on the Earth's surface. Here we present the data from the AST3-2 automatic survey in 2016 and the photometry results. The median 5$\sigma$ limiting magnitude in $i$-band is 17.8 mag and the light curve precision is 4 mmag for bright stars. The data release includes photometry for over 7~million stars, from which over 3,500 variable stars were detected, with 70 of them newly discovered. We classify these new variables into different types by combining their light curve features with stellar properties from surveys such as StarHorse.
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