Apertif-the focal-plane array system for the WSRT
Apertif-the focal-plane array system for the WSRT
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Apertif-WSRT 焦平面阵列系统
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Faulkner
中科院分区：
文献类型：
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作者：
A. Ardenne;T. V. D. Brink;A. Faulkner
我们描述了一个焦平面阵列（FPA）系统，被称为Awestif，这是正在开发的韦斯特博克综合射电望远镜（WSRT）。其目的是将WSRT的瞬时视场提高37倍，其观测带宽提高到300 MHz，具有高光谱分辨率。该系统将使WSRT成为一个有效的巡天望远镜，具有科学应用，如对北方天空的HI和OH发射、偏振连续谱的深度成像巡天以及对双星和瞬变的有效搜索。这样的调查将在超过100，000个星系中检测到z = 0.4的HI，将允许确定银河系磁场的详细结构，并将发现1，000多个恒星。我们目前的实验结果与原型FPA安装在WSRT碟之一。这些结果表明，FPA确实具有使所有这些调查成为可能所需的性能。
We describe a focal plane array (FPA) system, called Apertif, that is being developed for the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is to increase the instantaneous field of view of the WSRT by a factor of 37 and its observing bandwidth to 300 MHz with high spectral resolution. This system will turn the WSRT into an effective survey telescope with scientific applications such as deep imaging surveys of the northern sky of HI and OH emission, of the polarised continuum and efficient searches for pulsars and transients. Such surveys will detect the HI in more than 100,000 galaxies out to z = 0.4, will allow to determine the detailed structure of the magnetic field of the Galaxy, and will discover more than 1,000 pulsars. We present experimental results obtained with a prototype FPA installed in one of the WSRT dishes. These results demonstrate that FPAs do have the performance that is required to make all these surveys possible.