南极冰穹A AST3-2自动测量数据发布
Data Release of the AST3-2 Automatic Survey from Dome A, Antarctica
摘要：
AST 3 -2是三个南极巡天望远镜中的第二个，旨在进行宽场时域光学天文学。它位于南极洲的Dome A，从许多方面来看，这是地球表面最好的光学天文学站点。在这里，我们介绍了2016年AST 3 -2自动测量的数据和测光结果。对于亮星，$i$波段5 $σ$极限星等的中值为17.8等，光变精度为4毫等。此次发布的数据包括700多万颗恒星的测光，从中探测到3,500多颗变星，其中70颗是新发现的。我们将这些新的变量分为不同的类型，结合他们的光变曲线特征与恒星的性质，如StarHorse的调查。
英文摘要：
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$σ$ 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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