The Tianlai Dish Pathfinder Array: design, operation and performance of a prototype transit radio interferometer
| Autor: | Yanping Cong, Kaifeng Yu, Huli Shi, Shifan Zuo, John Marriner, Peter T. Timbie, Zhiping Chen, Albert Stebbins, Chenhui Niu, Juyong Zhang, Santanu Das, Yichao Li, Jean-Eric Campagne, Qunxiong Wang, Jialu Zhu, Xuelei Chen, Rongli Wang, Zijie Yu, Yidong Xu, Jixia Li, Yougang Wang, Olivier Perdereau, Trevor M. Oxholm, Haijun Tian, Jeffrey B. Peterson, Calvin Osinga, Jiao Zhang, Yanlin Wu, Shijie Sun, Qizhi Huang, R. Ansari, Tao Liu, John Podczerwinski, Anh Phan, Juhun Kwak, Fengquan Wu, Gage Siebert, Yingfeng Liu, Gregory S. Tucker |
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| Přispěvatelé: | Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
media_common.quotation_subject (cosmology:) large-scale structure of the Universe FOS: Physical sciences 01 natural sciences 7. Clean energy Signal Declination Optics Celestial pole 0103 physical sciences Calibration [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] (cosmology:) observations 010306 general physics 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) media_common Physics radio lines: galaxies COSMIC cancer database business.industry Intensity mapping Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Pathfinder Space and Planetary Science Sky techniques: interferometric business Astrophysics - Instrumentation and Methods for Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] instrumentaton: interferometers Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 506 (3), pp.3455-3482. ⟨10.1093/mnras/stab1802⟩ |
| ISSN: | 0035-8711 1365-2966 |
| DOI: | 10.48550/arxiv.2011.05946 |
| Popis: | The Tianlai Dish Pathfinder Array is a radio interferometer designed to test techniques for 21~cm intensity mapping in the post-reionization universe as a means for measuring large-scale cosmic structure. It performs drift scans of the sky at constant declination. We describe the design, calibration, noise level, and stability of this instrument based on the analysis of about $\sim 5 \%$ of 6,200 hours of on-sky observations through October, 2019. Beam pattern determinations using drones and the transit of bright sources are in good agreement, and compatible with electromagnetic simulations. Combining all the baselines, we make maps around bright sources and show that the array behaves as expected. A few hundred hours of observations at different declinations have been used to study the array geometry and pointing imperfections, as well as the instrument noise behaviour. We show that the system temperature is below 80~K for most feed antennas, and that noise fluctuations decrease as expected with integration time, at least up to a few hundred seconds. Analysis of long integrations, from 10 nights of observations of the North Celestial Pole, yielded visibilities with amplitudes of 20-30~mK, consistent with the expected signal from the NCP radio sky with $ 30 pages, 38 figures |
| Databáze: | OpenAIRE |
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