Sky reconstruction for the Tianlai cylinder array
arXiv:1606.03830 · doi:10.1088/1674-4527/16/10/158
Abstract
In this paper, we apply our sky map reconstruction method for transit type interferometers to the Tianlai cylinder array. The method is based on the spherical harmonic decomposition, and can be applied to cylindrical array as well as dish arrays and we can compute the instrument response, synthesised beam, transfer function and the noise power spectrum. We consider cylinder arrays with feed spacing larger than half wavelength, and as expected, we find that the arrays with regular spacing have grating lobes which produce spurious images in the reconstructed maps. We show that this problem can be overcome, using arrays with different feed spacing on each cylinder. We present the reconstructed maps, and study the performance in terms of noise power spectrum, transfer function and beams for both regular and irregular feed spacing configurations.
15 pages, 12 figures, accepted by RAA
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- The Tianlai Cylinder Pathfinder Array: System Functions and Basic Performance Analysis
- Data Processing Pipeline For Tianlai Experiment
- The Electromagnetic Characteristics of the Tianlai Cylindrical Pathfinder Array
- An imaging algorithm for a lunar orbit interferometer array
- HIR4: cosmology from a simulated neutral hydrogen full sky using Horizon Run 4
- Reflections and Standing Waves on the Tianlai Cylinder Array
- An Eigenvector-based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder
- A Fast Transient Backend to Detect FRBs with the Tianlai Dish Pathfinder Array
- Design, operation and performance of the PAON4 prototype transit interferometer
- A Spherical Harmonic Analysis of the Ooty Wide Field Array (OWFA) Visibility Signal
- Extracting 21cm signal by frequency and angular filtering
- Measurement of the Primary Beam of the Tianlai Cylindrical Antenna Using an Unmanned Aerial Vehicle
- Beamforming in Interferometer Arrays with Cross-couplings