A Fast Transient Backend to Detect FRBs with the Tianlai Dish Pathfinder Array
Zijie Yu, Furen Deng, Shijie Sun, Chenhui Niu, Jixia Li, Fengquan Wu,, Wei-Yang Wang, Yougang Wang, Hui Feng, Lin Shu, Jie Hao, Reza Ansari, Albert, Stebbins, Xuelei Chen

TL;DR
This paper presents a new millisecond-response digital backend for the Tianlai Dish Pathfinder array, enabling real-time detection and classification of fast radio bursts (FRBs) with improved temporal resolution.
Contribution
The paper introduces a novel digital backend with millisecond response time and a real-time search pipeline for FRBs, enhancing the array's capability for fast transient detection.
Findings
Successfully captured pulsar signals in commissioning
Formed 16 digital beams covering 19.6 square degrees
Enabled real-time FRB detection and classification
Abstract
The Tianlai Dish Pathfinder array is a radio interferometer array consisting of 16 six meter dish antennas. The original digital backend integration time is at the seconds level, designed for HI intensity mapping experiment. A new digital backend with millisecond response is added to enable it to search for fast radio burst (FRB) during its observations. The design and calibration of this backend, and the real time search pipeline for it are described in this paper. It is capable of forming 16 digital beams for each linear polarisation, covering an area of 19.6 square degrees. The search pipeline is capable of searching for, recording and classifying FRBs automatically in real time. In commissioning, we succeeded in capturing the signal pulses from the pulsars PSR B0329+54 and B2021+51.
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