The tianlai cylinder pathfinder array: System functions and basic performance analysis

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dc.contributor.authorLi, JiXia
dc.contributor.authorZuo, ShiFan
dc.contributor.authorWang, YouGang
dc.date.accessioned2020-12-01T13:49:27Z
dc.date.available2020-12-01T13:49:27Z
dc.date.issued2020
dc.description.abstractThe Tianlai Cylinder Pathfinder is a radio interferometer array designed to test techniques for 21 cm intensity mapping in the post-reionization Universe, with the ultimate aim of mapping the large scale structure and measuring cosmological parameters such as the dark energy equation of state. Each of its three parallel cylinder reflectors is oriented in the north-south direction, and the array has a large field of view. As the Earth rotates, the northern sky is observed by drift scanning. The array is located in Hongliuxia, a radio-quiet site in Xinjiang, and saw its first light in September 2016. In this first data analysis paper for the Tianlai cylinder array, we discuss the sub-system qualification tests, and present basic system performance obtained from preliminary analysis of the commissioning observations during 2016-2018. We show typical interferometric visibility data, from which we derive the actual beam profile in the east-west direction and the frequency band-pass response. We describe also the calibration process to determine the complex gains for the array elements, either using bright astronomical point sources, or an artificial on site calibrator source, and discuss the instrument response stability, crucial for transit interferometry. Based on this analysis, we find a system temperature of about 90 K, and we also estimate the sensitivity of the array.en_US
dc.identifier.citationLi, J., Zuo, S., Wu, F. et al. The Tianlai Cylinder Pathfinder array: System functions and basic performance analysis. Sci. China Phys. Mech. Astron. 63, 129862 (2020). https://doi.org/10.1007/s11433-020-1594-8en_US
dc.identifier.issn1674-7348
dc.identifier.uri10.1007/s11433-020-1594-8
dc.identifier.urihttp://hdl.handle.net/10566/5478
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.subjectInterferometeren_US
dc.subjectRadio astronomyen_US
dc.subjectNeutral hydrogenen_US
dc.subjectDark energyen_US
dc.titleThe tianlai cylinder pathfinder array: System functions and basic performance analysisen_US
dc.typeArticleen_US

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