Packing the sky: coverage optimization and evaluation for large telescope arrays

Packing the sky: coverage optimization and evaluation for large telescope arrays
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填充天空:大型望远镜阵列的覆盖优化和评估

DOI:
10.1117/12.2630082
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发表时间:
2022
期刊:
Ground-based and Airborne Telescopes IX
影响因子:
--
通讯作者:
Vasquez Soto, Alan
Vasquez Soto, Alan
中科院分区:
--
文献类型:
--
作者:
Galliher, Nathan W.;Law, Nicholas M.;Corbett, Henry T.;Gonzalez, Ramses;Machia, Lawrence;Vasquez Soto, Alan

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最近在低成本天文学设备方面取得的进展,包括高质量的中孔径望远镜和低噪声CMOS探测器,使得部署大型光学望远镜阵列在财政上可行,在科学上也有意义。Argus光学阵列就是这样一个系统,由900个8英寸望远镜组成,计划在每次曝光时覆盖整个夜空,并能够成为最深和最快的北方半球天空调查。这种新型望远镜带来了新的挑战:确定最佳的单个望远镜指向,以实现所需的天空覆盖范围和大量望远镜的重叠,并使用单独的支架,包含望远镜子阵列的较大安装结构或单个支架上的整个阵列来实现这些指向。在本文中,我们描述了一种方法,用于创建一个指向模式,并给出该模式的快速评估天空覆盖和重叠的算法,并将其应用到阿格斯阵列。使用这种模式,望远镜被放置成半球形排列,可以安装为单个单片阵列或分成几个较小的子阵列。这些方法可以应用于其他大型阵列,其中天空包装是具有挑战性的,并且均匀间隔的阵列细分是安装所必需的。
Recent advancements in low-cost astronomy equipment, including high-quality medium-aperture telescopes and low-noise CMOS detectors, have made the deployment of large optical telescope arrays both financially feasible and scientifically interesting. The Argus Optical Array is one such system, composed of 900 eight-inch telescopes, which is planned to cover the entire night sky in each exposure and is capable of being the deepest and fastest Northern Hemisphere sky survey. With this new class of telescope comes new challenges: determining optimal individual telescope pointings to achieve required sky coverage and overlaps for large numbers of telescopes, and realizing those pointings using either individual mounts, larger mounting structures containing telescope subarrays, or the full array on a single mount. In this paper, we describe a method for creating a pointing pattern, and an algorithm for rapidly evaluating sky coverage and overlaps given that pattern, and apply it to the Argus Array. Using this pattern, telescopes are placed into a hemispherical arrangement, which can be mounted as a single monolithic array or split into several smaller subarrays. These methods can be applied to other large arrays where sky packing is challenging and evenly spaced array subdivisions are necessary for mounting.
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