Bleien天文台的一个综合星系测绘系统
An Integrated System at the Bleien Observatory for Mapping the Galaxy
摘要：
我们描述的硬件系统的设计和性能在Bleien天文台。该系统的目的是提供一个银河系的地图，研究前景污染的低红移（z=0.13--0.43）H $_{\rm I}$强度映射实验以及其他天文银河系的研究。该硬件系统由7米抛物面天线、双极化波纹喇叭馈源、伪相关接收机、快速傅里叶变换光谱仪和控制和监测数据采集过程的集成控制系统组成。硬件方面的创新设计主要有：（1）伪相关接收机和冷参考源;（2）高动态范围、高频率分辨率频谱仪;（3）系统的相位切换实现。这是这些技术首次用于L波段射电望远镜，以实现电子稳定系统，这是宽场宇宙学测量的重要第一步。这项工作展示了未来H $_{\rm I}$强度映射实验的前景和挑战。
英文摘要：
We describe the design and performance of the hardware system at the Bleien Observatory. The system is designed to deliver a map of the Galaxy for studying the foreground contamination of low-redshift (z=0.13--0.43) H$_{\rm I}$ intensity mapping experiments as well as other astronomical Galactic studies. This hardware system is composed of a 7m parabolic dish, a dual-polarization corrugated horn feed, a pseudo correlation receiver, a Fast Fourier Transform spectrometer, and an integrated control system that controls and monitors the progress of the data collection. The main innovative designs in the hardware are (1) the pseudo correlation receiver and the cold reference source within (2) the high dynamic range, high frequency resolution spectrometer and (3) the phase-switch implementation of the system. This is the first time these technologies are used together for a L-band radio telescope to achieve an electronically stable system, which is an essential first step for wide-field cosmological measurements. This work demonstrates the prospects and challenges for future H$_{\rm I}$ intensity mapping experiments.
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