Holographic beam mapping of the CHIME pathfinder array

Holographic beam mapping of the CHIME pathfinder array
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CHIME 探路者阵列的全息光束映射

DOI：
10.1117/12.2233782
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发表时间：
2016
期刊：
Monthly Notices of the Royal Astronomical Society
影响因子：
4.8
通讯作者：
D. Wiebe
D. Wiebe
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
P. Berger;L. Newburgh;M. Amiri;K. Bandura;J. Cliche;L. Connor;M. Deng;N. Denman;M. Dobbs;M. Fandino;A. Gilbert;D. Good;M. Halpern;D. Hanna;A. Hincks;G. Hinshaw;C. Höfer;A. Johnson;T. Landecker;K. Masui;Juan Mena Parra;N. Oppermann;U. Pen;J. Peterson;A. Recnik;T. Robishaw;J. Shaw;S. Siegel;K. Sigurdson;Kendrick M. Smith;E. Storer;I. Tretyakov;Kwinten Van Gassen;K. Vanderlinde;D. Wiebe

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加拿大氢强度测绘实验探路者射电望远镜目前正在400至800兆赫之间测量北方半球。通过绘制中性氢在z = 0.8-2.5之间的红移21厘米线发射的大尺度结构，CHIME将有助于我们对暗能量的理解。明亮的天体物理前景必须从中性氢信号中分离出来，这一任务需要对偏振的望远镜光束进行精确的表征。使用DRAO John A. Galt 26米望远镜，我们已经开发了一种全息仪器和技术映射CHIME探路者光束.我们报告的文书和这一努力的初步成果的状态。
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder radio telescope is currently surveying the northern hemisphere between 400 and 800 MHz. By mapping the large scale structure of neutral hydrogen through its redshifted 21 cm line emission between z∼0.8-2.5 CHIME will contribute to our understanding of Dark Energy. Bright astrophysical foregrounds must be separated from the neutral hydrogen signal, a task which requires precise characterization of the polarized telescope beams. Using the DRAO John A. Galt 26 m telescope, we have developed a holography instrument and technique for mapping the CHIME Pathfinder beams. We report the status of the instrument and initial results of this effort.
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