The latest on Apertif
The latest on Apertif
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DOI：
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发表时间：
2010
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通讯作者：
Groningen
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作者：
T. Oosterloo;M. Verheijen;W.J.G. de Blok Netherlands Institute for Radio Astronomy;Dwingeloo;K. Institute;Groningen
我们描述了一个相控阵馈电（PAF）系统，称为天线，这将安装在韦斯特博克综合射电望远镜（WSRT）。目标是在1.0 ~ 1.7 GHz的频率范围内，将WSRT的瞬时视场提高到8 deg 2，观测带宽提高到300 MHz，并具有较高的光谱分辨率。该系统将使WSRT成为一个有效的巡天望远镜，其科学应用范围从对北方天空的HI和OH发射和偏振连续谱的深度巡天到对日冕和瞬变的有效搜索。我们目前获得的结果与原型PAF安装在WSRT碟之一。这些结果表明，在分米波长处，PAF具有优异的性能，即使对于天空中的单个波束，它们也可以胜过单馈无线电碟形天线。PAF使射电望远镜成为非常有效的测量仪器。目前，该基金已获得充分的资金，并邀请社区表达对使用该基金的兴趣（见http：//www.astron.nl/radio-observatory/call-expressions-interest-apertif-surveys）。
We describe a Phased Array Feed (PAF) system, called Apertif, which will be installed in the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is, at frequencies from 1.0 to 1.7 GHz, to increase the instantaneous field of view of the WSRT to 8 deg2 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 ranging from deep surveys of the northern sky of HI and OH emission and polarised continuum to efficient searches for pulsars and transients. We present results obtained with a prototype PAF installed in one of the WSRT dishes. These results demonstrate that at decimetre wavelengths PAFs have excellent performance and that even for a single beam on the sky, they can outperform single feed radio dishes. PAFs turn radio telescopes into very effective survey instruments. Apertif is now fully funded and the community invited to express their interest in using Apertif (see http://www.astron.nl/radio-observatory/call-expressions-interest-apertif-surveys)