Building the Evryscope: Hardware Design and Performance
Building the Evryscope: Hardware Design and Performance
复制标题
构建 Evryscope：硬件设计和性能
DOI：
10.1088/1538-3873/ab19d0
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发表时间：
2019
影响因子：
3.5
通讯作者：
J. Haislip
中科院分区：
文献类型：
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作者：
J. Ratzloff;N. Law;O. Fors;H. Corbett;W. Howard;D. D. Ser;J. Haislip
Evryscope是一个望远镜阵列，旨在打开光学天文学的新参数空间，同时检测跨越极大天空区域的短时间尺度事件。该系统由一个780 MPix 22摄像头阵列组成，具有8150 sq.°的视场，每像素13“采样，并能够在每2分钟的黑暗天空曝光中检测到m g ′ m 16的物体。Evryscope占地18，400平方米。°的每晚有数小时的高节奏曝光时间，旨在发现需要全天监测的罕见事件，包括围绕外来恒星（如白色矮星和热亚矮星）的系外行星过境，我们星系内所有类型的恒星活动，附近的超新星以及其他瞬态事件，如伽马射线爆发和引力波电磁对应物。该系统平均每晚拍摄5000张图像，每张图像有300，000个来源，迄今为止已拍摄了超过300万张图像，总计250 TB的原始数据。由此产生的光变曲线数据库包含930万个目标的光变曲线，到2018年每个目标平均有32，600个历元。本文总结了Evryscope的硬件和性能，包括在望远镜设计，电子设计，安装的精密极对准的程序Evryscope类系统，机器人控制和操作，以及安全和性能优化系统的经验教训。我们测量的Evryscope在天空中的性能，讨论其数据分析管道，并提出了一些例子变量星星和日食双星发现的望远镜。我们还讨论了新发现的非常罕见的对象，包括两个热的亚矮星食双星与晚M-矮秒（HW Vir系统），两个白色矮/热亚矮星短周期双星，和四个热亚矮星反射双星。我们的结论与我们的过境调查，M-矮星耀斑调查，和瞬态检测的状态。
The Evryscope is a telescope array designed to open a new parameter space in optical astronomy, detecting short-timescale events across extremely large sky areas simultaneously. The system consists of a 780 MPix 22-camera array with an 8150 sq. deg. field of view, 13″ per pixel sampling, and the ability to detect objects down to m g ′ ≃ 16 in each 2-minute dark-sky exposure. The Evryscope, covering 18,400 sq. deg. with hours of high-cadence exposure time each night, is designed to find the rare events that require all-sky monitoring, including transiting exoplanets around exotic stars like white dwarfs and hot subdwarfs, stellar activity of all types within our galaxy, nearby supernovae, and other transient events such as gamma-ray bursts and gravitational-wave electromagnetic counterparts. The system averages 5000 images per night with ∼300,000 sources per image, and to date has taken over 3.0M images, totaling 250 TB of raw data. The resulting light curve database has light curves for 9.3M targets, averaging 32,600 epochs per target through 2018. This paper summarizes the hardware and performance of the Evryscope, including the lessons learned during telescope design, electronics design, a procedure for the precision polar alignment of mounts for Evryscope-like systems, robotic control and operations, and safety and performance-optimization systems. We measure the on-sky performance of the Evryscope, discuss its data analysis pipelines, and present some example variable star and eclipsing binary discoveries from the telescope. We also discuss new discoveries of very rare objects including two hot subdwarf eclipsing binaries with late M-dwarf secondaries (HW Vir systems), two white dwarf/hot subdwarf short-period binaries, and four hot subdwarf reflection binaries. We conclude with the status of our transit surveys, M-dwarf flare survey, and transient detection.
优化长时间序列中凌日行星的搜索
影响因子：
6.5
作者：
通讯作者：
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