The C-Band All-Sky Survey (C-BASS): design and capabilities
The C-Band All-Sky Survey (C-BASS): design and capabilities
复制标题
DOI：
10.1093/mnras/sty1956
复制
发表时间：
2018-05
影响因子：
4.8
通讯作者：
Michael E. Jones;A. Taylor;Moumita Aich;C. Copley;C. Copley;H. Chiang;R. Davis;C. Dickinson;R. Grumitt;Y. Hafez;H. Heilgendorff;C. Holler;C. Holler;M. Irfan;M. Irfan;L. Jew;J. J. John-J.;J. Jonas;O. King;O. King;J. Leahy;J. Leech;E. Leitch;S. Muchovej;T. Pearson;M. Peel;M. Peel;A. Readhead;J. Sievers;M. Stevenson;J. Zuntz;J. Zuntz;J. Zuntz
中科院分区：
文献类型：
--
作者：
Michael E. Jones;A. Taylor;Moumita Aich;C. Copley;C. Copley;H. Chiang;R. Davis;C. Dickinson;R. Grumitt;Y. Hafez;H. Heilgendorff;C. Holler;C. Holler;M. Irfan;M. Irfan;L. Jew;J. J. John-J.;J. Jonas;O. King;O. King;J. Leahy;J. Leech;E. Leitch;S. Muchovej;T. Pearson;M. Peel;M. Peel;A. Readhead;J. Sievers;M. Stevenson;J. Zuntz;J. Zuntz;J. Zuntz
C波段全天巡天（C-BASS）是一种频率为5 GHz的全天全极化巡天，旨在为WMAP和普朗克的全天巡天以及未来的CMB B模式极化成像巡天提供补充数据。观测频率的选择是为了提供一个由银河系同步辐射主导的信号，但几乎不受法拉第旋转的影响，因此测得的偏振方向为更高频率的观测提供了一个很好的模板，并携带有关银河系磁场的直接信息。北方和南方半球的望远镜具有匹配的光学性能，用于从地面实验中提供全天覆盖。每个望远镜上的连续比较辐射计和相关偏振计提供稳定的成像特性，以便准确测量从45弧分仪器分辨率到全天的所有角尺度。北方仪器已完成测量，南方仪器已开始观测。我们预计，C-BASS数据将显着提高普朗克和其他CMB数据的组件分离分析，并将提供重要的约束异常银河尘埃和银河磁场的属性。
The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarization survey at a frequency of 5 GHz, designed to provide complementary data to the all-sky surveys of WMAP and Planck, and future CMB B-mode polarization imaging surveys. The observing frequency has been chosen to provide a signal that is dominated by Galactic synchrotron emission, but suffers little from Faraday rotation, so that the measured polarization directions provide a good template for higher frequency observations, and carry direct information about the Galactic magnetic field. Telescopes in both northern and southern hemispheres with matched optical performance are used to provide all-sky coverage from a ground-based experiment. A continuous-comparison radiometer and a correlation polarimeter on each telescope provide stable imaging properties such that all angular scales from the instrument resolution of 45 arcmin up to full sky are accurately measured. The northern instrument has completed its survey and the southern instrument has started observing. We expect that C-BASS data will significantly improve the component separation analysis of Planck and other CMB data, and will provide important constraints on the properties of anomalous Galactic dust and the Galactic magnetic field.