The ASAS-SN catalogue of variable stars III: variables in the southern TESS continuous viewing zone
The ASAS-SN catalogue of variable stars III: variables in the southern TESS continuous viewing zone
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DOI：
10.1093/mnras/stz444
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发表时间：
2018-12
影响因子：
4.8
通讯作者：
T. Jayasinghe;K. Stanek;C. Kochanek;B. Shappee;T. Holoien;T. Thompson;T. Thompson;J. Prieto
中科院分区：
文献类型：
--
作者：
T. Jayasinghe;K. Stanek;C. Kochanek;B. Shappee;T. Holoien;T. Thompson;T. Thompson;J. Prieto
全天超新星自动巡天（ASAS-SN）为整个天空中比V $\lesssim17$等更亮的光源提供了长基线（${\sim}4$年）光曲线。凌日系外行星测量卫星（TESS）已经开始以至少27天的基线生成高质量的光曲线，最终将覆盖大部分天空。ASAS-SN和TESS光曲线的结合对长期和短期变化进行了非常详细的探测，特别是在黄道极的TESS连续观测区（CVZ）。我们已经制作了${\sim}1.3$万个v波段光曲线，覆盖了朝向TESS CVZ南部的${\sim}1000 \, \rm deg^2$，并系统地搜索了这些源的变异性。我们已经确定了${\sim} 11,700$变量，包括${\sim} 7,000$新发现。这些变星的光曲线和特征都可以通过ASAS-SN变星数据库（此https URL）获取。我们还介绍了一个在线资源，以获得预先计算的ASAS-SN v波段光曲线（此https URL），该资源从本工作中研究的${\sim}1.3$亿个光源的光曲线开始。这项工作将扩展到提供整个天空中${\sim}50\;$百万个光源的ASAS-SN光曲线。
The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) light curves for sources brighter than V$\lesssim17$ mag across the whole sky. The Transiting Exoplanet Survey Satellite (TESS) has started to produce high-quality light curves with a baseline of at least 27 days, eventually for most of the sky. The combination of ASAS-SN and TESS light curves probes both long and short term variability in great detail, especially towards the TESS continuous viewing zones (CVZ) at the ecliptic poles. We have produced ${\sim}1.3$ million V-band light curves covering a total of ${\sim}1000 \, \rm deg^2$ towards the southern TESS CVZ and have systematically searched these sources for variability. We have identified ${\sim} 11,700$ variables, including ${\sim} 7,000$ new discoveries. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars database (this https URL). We also introduce an online resource to obtain pre-computed ASAS-SN V-band light curves (this https URL) starting with the light curves of the ${\sim}1.3$ million sources studied in this work. This effort will be extended to provide ASAS-SN light curves for ${\sim}50\;$million sources over the entire sky.