ADAPTIF-用于WSRT的焦平面阵列系统
Apertif - the focal-plane array system for the WSRT
摘要：
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）。其目标是将WSRT的瞬时视场提高37倍，观测带宽提高到300 MHz，并具有高光谱分辨率。该系统将把WSRT变成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。这样的巡天将在z = 0.4的10万多个星系中探测到HI，将允许确定银河系磁场的详细结构，并将发现1,000多个磁共振星。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。
英文摘要：
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.
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