The FRB-searching Pipeline of the Tianlai Cylinder Pathfinder Array  

作　　者：Zijie Yu Furen Deng Shijie Sun Chenhui Niu Jixia Li Fengquan Wu Wei-Yang Wang Yougang Wang Shifan Zuo Lin Shu Jie Hao Xiaohui Liu Reza Ansari Ue-Li Pen Albert Stebbins Peter Timbie Xuelei Chen 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Science,Beijing 100101,China [4]Institute of Astrophysics,Central China Normal University,Wuhan 430079,China [5]Institute of Automation,Chinese Academy of Sciences,Beijing 100190,China [6]Guangdong Institute of Artificial Intelligence and Advanced Computing,Guangzhou 510535,China [7]UniversitéParis-Saclay,CNRS/IN2P3,IJCLab,91405 Orsay,France [8]Institute of Astronomy and Astrophysics,Academia Sinica,Roosevelt Road,Taipei 10617,Taiwan,China [9]Canadian Institute for Theoretical Astrophysics,University of Toronto,60 Saint George Street,Toronto,ON M5S 3H8,Canada [10]Department of Physics,University of Wisconsin-Madison,Madison,WI 53706,USA [11]Fermi National Accelerator Laboratory,P.O.Box 500,Batavia IL 60510-5011,USA [12]Department of Physics,College of Sciences,Northeastern University,Shenyang 110819,China [13]Center of High Energy Physics,Peking University,Beijing 100871,China

出　　处：《Research in Astronomy and Astrophysics》2024年第8期113-132,共20页天文和天体物理学研究（英文版）

基　　金：support of the National SKA program of China(Nos.2022SKA0110100 and 2022SKA0110101);the National Natural Science Foundation of China(NSFC,Grant Nos.1236114814,12203061,12273070,and 12303004)。

摘　　要：This paper presents the design,calibration,and survey strategy of the Fast Radio Burst(FRB)digital backend and its real-time data processing pipeline employed in the Tianlai Cylinder Pathfinder Array.The array,consisting of three parallel cylindrical reflectors and equipped with 96 dual-polarization feeds,is a radio interferometer array designed for conducting drift scans of the northern celestial semi-sphere.The FRB digital backend enables the formation of 96 digital beams,effectively covering an area of approximately 40 square degrees with the 3 dB beam.Our pipeline demonstrates the capability to conduct an automatic search of FRBs,detecting at quasi-realtime and classifying FRB candidates automatically.The current FRB searching pipeline has an overall recall rate of88%.During the commissioning phase,we successfully detected signals emitted by four well-known pulsars:PSR B0329+54,B2021+51,B0823+26,and B2020+28.We report the first discovery of an FRB by our array,designated as FRB 20220414A.We also investigate the optimal arrangement for the digitally formed beams to achieve maximum detection rate by numerical simulation.

关 键 词：instrumentation interferometers-methods data analysis-(stars )pulsars general-telescopes 

分 类 号：P161[天文地球—天文学]