The Multi-site All-Sky CAmeRA: Finding transiting exoplanets around bright ($m_V < 8$) stars
The Multi-site All-Sky CAmeRA: Finding transiting exoplanets around bright ($m_V < 8$) stars
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DOI：
10.1051/0004-6361/201630319
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发表时间：
2017-02
期刊：
影响因子：
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通讯作者：
G. Talens;J. Spronck;A.-L. Lesage;G. Otten;R. Stuik;D. Pollacco;I. Snellen
中科院分区：
文献类型：
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作者：
G. Talens;J. Spronck;A.-L. Lesage;G. Otten;R. Stuik;D. Pollacco;I. Snellen
本文介绍了多站点全天空相机（MASCARA）的设计，操作和性能。它的主要目标是通过监测整个天空来寻找新的系外行星，这些行星是明亮的恒星，$4 < m_V < 8$。MASCARA由位于加那利群岛拉帕尔马的一个北方站（自2015年2月起全面运行）、位于智利拉西拉天文台的一个南方站（自2017年初开始运行）和位于荷兰莱顿天文台的一个数据中心组成。MASCARA的两个观测站都配备了五台使用固定指向的宽视场透镜（焦距为24毫米）的行间CCD照相机，这些照相机一起提供了对当地天空3号气团的覆盖。行间CCD相机允许背靠背曝光，在固定的恒星时间拍摄，曝光时间为6.4恒星秒。曝光时间足够短，以至于在积分过程中，恒星穿过CCD的运动不会超过一个像素。天文测量和光度测量在现场进行，之后产生的光变曲线被转移到莱顿进行进一步分析。最终的MASCARA存档将包含${\sim} 70，000 $恒星的光变曲线，低至$m_V=8.4$，精度为$m_V=8$时每5分钟1.5\%$。
This paper describes the design, operations, and performance of the Multi-site All-Sky CAmeRA (MASCARA). Its primary goal is to find new exoplanets transiting bright stars, $4 < m_V < 8$, by monitoring the full sky. MASCARA consists of one northern station on La Palma, Canary Islands (fully operational since February 2015), one southern station at La Silla Observatory, Chile (operational from early 2017), and a data centre at Leiden Observatory in the Netherlands. Both MASCARA stations are equipped with five interline CCD cameras using wide field lenses (24 mm focal length) with fixed pointings, which together provide coverage down to airmass 3 of the local sky. The interline CCD cameras allow for back-to-back exposures, taken at fixed sidereal times with exposure times of 6.4 sidereal seconds. The exposures are short enough that the motion of stars across the CCD does not exceed one pixel during an integration. Astrometry and photometry are performed on-site, after which the resulting light curves are transferred to Leiden for further analysis. The final MASCARA archive will contain light curves for ${\sim}70,000$ stars down to $m_V=8.4$, with a precision of $1.5\%$ per 5 minutes at $m_V=8$.