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arXiv 2107.01634astro-ph.IMastro-ph.CO
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BINGO项目II:仪器描述

The BINGO Project II: Instrument Description

Carlos A. Wuensche, Thyrso Villela, Elcio Abdalla, Vincenzo Liccardo, Frederico Vieira, Ian Browne, Michael W. Peel, Christopher Radcliffe, Filipe B. Abdalla, A… 展开作者

Carlos A. Wuensche, Thyrso Villela, Elcio Abdalla, Vincenzo Liccardo, Frederico Vieira, Ian Browne, Michael W. Peel, Christopher Radcliffe, Filipe B. Abdalla, Alessandro Marins, Luciano Barosi, Francisco A. Brito, Amilcar R. Queiroz, Bin Wang, Andre A. Costa, Elisa G. M. Ferreira, Karin S. F. Fornazier, Ricardo G. Landim, Camila P. Novaes, Larissa Santos, Marcelo V. dos Santos, Jiajun Zhang, Tianyue Chen, Jacques Delabrouille, Clive Dickinson, Giancarlo de Gasperis, Edmar C. Gurjão, Stuart Harper, Yin-Zhe Ma, Telmo Machado, Bruno Maffei, Eduardo J. de Mericia, Christian Monstein, Pablo Motta, Carlos H. N. Otobone, Luiz A. Reitano, Mathieu Remazeilles, Sambit Roychowdhury, João R. L. Santos, Alexandre J. R. Serres, Andreia P. Souza, Cesar Strauss, Jordany Vieira, Haiguang Xu

摘要:

测量不同红移的中性氢超精细跃迁(HI信号)的21厘米漫射辐射是现代宇宙学的重要工具。然而,用单碟望远镜中的非低温接收器检测这种微弱的信号是一项具有挑战性的任务。BINGO(重子声学振荡综合中性气体观测)射电望远镜是一种用于探测宇宙学HI信号中的重子声振荡(BAO)的仪器,其红移区间为$0.127 \le z \le 0.449$。本文介绍了BINGO射电望远镜,包括光学系统、接收机、观测策略、定标和场地的现状。BINGO经过精心设计,以尽量减少系统性,作为一个过境文书,没有移动碟和28喇叭工作在频率范围$980 \le ν\le 1260$ MHz。对许多BINGO子系统进行了全面的实验室测试,并在2018 - 2020年期间成功测试了接收器链,喇叭,偏振器,魔术T恤和过渡的原型。巡天的目的是覆盖天空的$\sim 13\%$,主镜指向十度角的$δ=-15^{\circ}$。望远镜将看到$14.75^{\circ}$的瞬时衰减带。原型测试的结果与建模过程中获得的结果非常接近,这表明BINGO将按照我们的预期执行。在使用$60\%$占空比和28个喇叭进行一年的观测后,BINGO应达到每9.33 MHz频道102 $μK$的预期灵敏度,一个极化,并能够在竞争性时间帧内测量HI功率谱。

英文摘要:

The measurement of diffuse 21-cm radiation from the hyperfine transition of neutral hydrogen (HI signal) in different redshifts is an important tool for modern cosmology. However, detecting this faint signal with non-cryogenic receivers in single-dish telescopes is a challenging task. The BINGO (Baryon Acoustic Oscillations from Integrated Neutral Gas Observations) radio telescope is an instrument designed to detect baryonic acoustic oscillations (BAOs) in the cosmological HI signal, in the redshift interval $0.127 \le z \le 0.449$. This paper describes the BINGO radio telescope, including the current status of the optics, receiver, observational strategy, calibration, and the site. BINGO has been carefully designed to minimize systematics, being a transit instrument with no moving dishes and 28 horns operating in the frequency range $980 \le ν\le 1260$ MHz. Comprehensive laboratory tests were conducted for many of the BINGO subsystems and the prototypes of the receiver chain, horn, polarizer, magic tees, and transitions have been successfully tested between 2018 - 2020. The survey was designed to cover $\sim 13\%$ of the sky, with the primary mirror pointing at declination $δ=-15^{\circ}$. The telescope will see an instantaneous declination strip of $14.75^{\circ}$. The results of the prototype tests closely meet those obtained during the modeling process, suggesting BINGO will perform according to our expectations. After one year of observations with a $60\%$ duty cycle and 28 horns, BINGO should achieve an expected sensitivity of 102 $μK$ per 9.33 MHz frequency channel, one polarization, and be able to measure the HI power spectrum in a competitive time frame.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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