The Tianlai Cylinder Pathfinder Array: System Functions and Basic Performance Analysis

Abstract

The 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.

arXiv comment28 pages, 30 figures

References in corpus (22)

• LOFAR: The LOw-Frequency ARray
• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• Hydrogen Epoch of Reionization Array (HERA)
• Reionization and Cosmology with 21 cm Fluctuations
• The Precision Array for Probing the Epoch of Reionization: 8 Station Results
• An Accurate Flux Density Scale from 50 MHz to 50 GHz
• Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation
• Determination of z~0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping auto-correlation
• Data Analysis for Precision 21 cm Cosmology
• Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
• Lack of clustering in low-redshift 21-cm intensity maps cross-correlated with 2dF galaxy densities
• HIRAX: A Probe of Dark Energy and Radio Transients
• The Tianlai project: a 21cm cosmology experiment
• A ground-based 21cm Baryon acoustic oscillation survey
• The Radio Sky at Meter Wavelengths: m-Mode Analysis Imaging with the Owens Valley Long Wavelength Array
• Precise measurements of inflationary features with 21 cm observations
• Sky reconstruction from transit visibilities: PAON-4 and Tianlai Dish Array
• Three-dimensional non-vacuum pulsar outer-gap model: Localized acceleration electric field in the higher altitudes
• Sky reconstruction for the Tianlai cylinder array
• An Eigenvector-based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder
• A Spherical Harmonic Analysis of the Ooty Wide Field Array (OWFA) Visibility Signal
• Design, operation and performance of the PAON4 prototype transit interferometer

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• Measurement of the Primary Beam of the Tianlai Cylindrical Antenna Using an Unmanned Aerial Vehicle
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