CHARACTERIZATION OF THE BICEP TELESCOPE FOR HIGH-PRECISION COSMIC MICROWAVE BACKGROUND POLARIMETRY-猫眼课题宝

用于高精度宇宙微波背景旋光测量的二头肌望远镜的表征

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发表时间：

2009

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作者：

Y. Takahashi;P. Ade;D. Barkats;D. Barkats;J. Battle;E. Bierman;J. Bock;J. Bock;H. Chiang;H. Chiang;C. Dowell;L. Duband;E. Hivon;W. Holzapfel;V. Hristov;W. Jones;W. Jones;B. Keating;J. Kovac;C. Kuo;A. Lange;E. Leitch;P. Mason;T. Matsumura;H. Nguyen;N. Ponthieu;C. Pryke;S. Richter;G. Rocha;G. Rocha;K. W. Yoon

宇宙河外偏振背景成像（Bicep）实验是专门设计来寻找宇宙微波背景（CMB）偏振中暴胀引力波的签名。Bicep利用一个新的小孔径折射镜和49对偏振敏感测辐射热计，从2006年2月开始，在南极完成了三年的成功观测。为了限制暴胀B模式偏振的振幅（预计其比3 K CMB强度至少弱7个数量级），对系统效应的精确控制至关重要。本文介绍了表征的潜在系统误差的Bicep实验，补充同伴的初步宇宙学结果的文件。利用实验的分析管道，我们模拟了系统误差对B模偏振测量的影响。在这些模拟的指导下，我们已经建立了关键的仪器特性，包括测辐射热计的相对增益，光束失配，偏振方向，望远镜指向，旁瓣，热稳定性和时间流噪声模型的表征基准。基准与测量值的比较表明，我们已经充分表征了仪器，以确保系统误差不会限制Bicep的两年结果，并确定了未来的改进可能需要探测通货膨胀B模式极化下降到张量标量比r = 0.1以下的水平。

The Background Imaging of Cosmic Extragalactic Polarization (Bicep) experiment was designed specifically to search for the signature of inflationary gravitational waves in the polarization of the cosmic microwave background (CMB). Using a novel small-aperture refractor and 49 pairs of polarization-sensitive bolometers, Bicep has completed three years of successful observations at the South Pole beginning in 2006 February. To constrain the amplitude of the inflationary B-mode polarization, which is expected to be at least 7 orders of magnitude fainter than the 3 K CMB intensity, precise control of systematic effects is essential. This paper describes the characterization of potential systematic errors for the Bicep experiment, supplementing a companion paper on the initial cosmological results. Using the analysis pipelines for the experiment, we have simulated the impact of systematic errors on the B-mode polarization measurement. Guided by these simulations, we have established benchmarks for the characterization of critical instrumental properties including bolometer relative gains, beam mismatch, polarization orientation, telescope pointing, sidelobes, thermal stability, and timestream noise model. A comparison of the benchmarks with the measured values shows that we have characterized the instrument adequately to ensure that systematic errors do not limit Bicep's two-year results, and identifies which future refinements are likely necessary to probe inflationary B-mode polarization down to levels below a tensor-to-scalar ratio r = 0.1.

QUaD: A HIGH-RESOLUTION COSMIC MICROWAVE BACKGROUND POLARIMETER

DOI： 10.1088/0004-637x/692/2/1221

发表时间： 2008-05

期刊：

The Astrophysical Journal

影响因子： --

作者：

QUaD collaboration J. R. Hinderks;P. Ade;J. Bock;M. Bowden;M. L. Brown;G. Cahill;J. Carlstrom;P. G. Castro;S. Church;T. Culverhouse;R. Friedman;K. Ganga;W. Gear;S. Gupta;J. Harris;V. Haynes;B. Keating;J. Kovac;E. Kirby;A. E. Lange;E. Leitch;O. Mallie;S. Melhuish;Y. Memari;J. A. Murphy;A. Orlando;R. Schwarz;C. O'Sullivan;L. Piccirillo;C. Pryke;N. Rajguru;B. Rusholme;A. Taylor;K. Thompson;C. Tucker;A. H. Turner;E. Y. S. Wu;M. University;Nasa Goddard Cardiff University;Jpl Caltech University of Edinburgh;U. Cambridge;National University of Ireland Maynooth;U. Chicago;Universidade T'ecnica de Lisboa;Laboratoire Apccnrs;U. Manchester;University of California San Diego University College London-University-of-California-San-Diego-University-2303464988

通讯作者：

CHARACTERIZATION OF THE BICEP TELESCOPE FOR HIGH-PRECISION COSMIC MICROWAVE BACKGROUND POLARIMETRY

用于高精度宇宙微波背景旋光测量的二头肌望远镜的表征

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