**title** Asp Conference Series, Vol. **volume**, **publication Year** **editors** the Cosmic Background Imager
**title** Asp Conference Series, Vol. **volume**, **publication Year** **editors** the Cosmic Background Imager
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**标题** Asp 会议系列，卷。
DOI：
10.1117/12.2055506
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发表时间：
2000
影响因子：
3
通讯作者：
J. Cartwright
中科院分区：
文献类型：
--
作者：
T. Pearson;B. Mason;S. Padin;A. Readhead;M. Shepherd;J. Sievers;P. Udomprasert;J. Cartwright
宇宙背景成像仪（Cosmic Background Imager， CBI）是一种仪器，用于拍摄宇宙微波背景辐射的图像，并测量其在角尺度上的统计特性，角尺度从约3角分到1度（球谐尺度从1 ~ 4250到1 ~ 400）。CBI是一个安装在6米平台上的13元干涉仪，在26 GHz到36 GHz的10个1 GHz频段工作。仪器瞬时视场为45角分（FWHM），分辨率3 ~ 10角分；更大的区域可以通过拼接成像。在这个频率和分辨率下，主要前景是由于离散的河外源，这些源由欧文斯谷射电天文台监测，并从CBI的能见度测量中减去。自1999年底以来，该仪器一直在智利北部圣佩德罗德阿塔卡马附近海拔5080米的地方观测原始CMB波动和星系团中的Sunyaev-Zeldovich效应。观测将持续到2001年8月或以后。我们提出最初几个月观察的初步结果。
The Cosmic Background Imager (CBI) is an instrument designed to make images of the cosmic microwave background radiation and to measure its statistical properties on angular scales from about 3 arc minutes to one degree (spherical harmonic scales from l ∼ 4250 down to l ∼ 400). The CBI is a 13-element interferometer mounted on a 6 meter platform operating in ten 1-GHz frequency bands from 26 GHz to 36 GHz. The instantaneous field of view of the instrument is 45 arcmin (FWHM) and its resolution ranges from 3 to 10 arcmin; larger fields can be imaged by mosaicing. At this frequency and resolution, the primary foreground is due to discrete extragalactic sources, which are monitored at the Owens Valley Radio Observatory and subtracted from the CBI visibility measurements. The instrument has been making observations since late 1999 of both primordial CMB fluctuations and the Sunyaev-Zeldovich effect in clusters of galaxies from its site at an altitude of 5080 meters near San Pedro de Atacama, in northern Chile. Observations will continue until August 2001 or later. We present preliminary results from the first few months of observations.