论文标题
内而外,颠倒的望远镜:Argus阵列的新伪焦点设计
The inside-out, upside-down telescope: the Argus Array's new pseudofocal design
论文作者
论文摘要
Argus光学阵列将是第一个全天空,弧形分辨率,5-M类望远镜。目前正在原型的55个GPIX阵列将由900个望远镜组成,具有61 mpix非常低的噪声CMOS检测器,可实现下秒的节奏。阿格斯(Argus)每晚将观察北方天空的每个部分6-12个小时,并同时进行高度添加和深度的调查。该阵列将制作一部两色,百万 - 上的电影,每分钟达到$ m_g $ = 19.6的深度深度,每周47%的天空中的47%,每周$ = 23.6 $ = 23.6,可以搜索高速瞬态,重力瞬态,高度波动,大型范围,exoplanet Microlanet Microlememementing Everts和其他现象。在本文中,我们介绍了新发达的阵列布置,该布置将所有望远镜安装在半球形碗的内部(将原始的圆顶设计内部旋转)。因此,望远镜的梁在单个``假焦点''点上收敛。当沿望远镜的极轴放置时,此点不会在望远镜轨道时移动,从而使每个望远镜都可以通过固定的外壳中的单个,不动的窗口同时浏览。这个望远镜碗悬挂在一个简单的自由旋转枢轴中(将通常的望远镜安装支撑颠倒),而极地对齐是由由第二个安装枢轴定义的虚拟极轴的创建提供的。这种新设计目前是用38泰式距离Argus探路者进行原型的,它消除了对可移动的外部圆顶的需求,因此大大降低了完整的Argus阵列的成本和复杂性。加上仔细的软件范围控制和现有软件管道的使用,Argus阵列可以在中期级别的预算中成为最深层,最快的天空调查之一。
The Argus Optical Array will be the first all-sky, arcsecond-resolution, 5-m class telescope. The 55 GPix Array, currently being prototyped, will consist of 900 telescopes with 61 MPix very-low-noise CMOS detectors enabling sub-second cadences. Argus will observe every part of the northern sky for 6-12 hours per night, achieving a simultaneously high-cadence and deep-sky survey. The array will build a two-color, million-epoch movie, reaching dark-sky depths of $m_g$=19.6 each minute and $m_g$=23.6 each week over 47% of the entire sky, enabling the most-sensitive-yet searches for high-speed transients, gravitational-wave counterparts, exoplanet microlensing events, and a host of other phenomena. In this paper we present our newly-developed array arrangement, which mounts all telescopes into the inside of a hemispherical bowl (turning the original dome design inside-out). The telescopes' beams thus converge at a single ``pseudofocal'' point. When placed along the telescope's polar axis, this point does not move as the telescope tracks, allowing every telescope to simultaneously look through a single, unmoving window in a fixed enclosure. This telescope bowl is suspended from a simple free-swinging pivot (turning the usual telescope mounting support upside-down), with polar alignment afforded by the creation of a virtual polar axis defined by a second mounting pivot. This new design, currently being prototyped with the 38-telescope Argus Pathfinder, eliminates the need for a movable external dome and thus greatly reduces the cost and complexity of the full Argus Array. Coupled with careful software scope control and the use of existing software pipelines, the Argus Array could thus become one of the deepest and fastest sky surveys, within a midscale-level budget.