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Investigating FRB 20240114A with FAST: Morphological Classification and Drifting Rate Measurements in a Burst-Cluster Framework

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Main Authors:	Zhang, Long-Xuan, Tian, Shiyan, Shen, Junyi, Zhang, Jun-Shuo, Zhou, Dejiang, Zhou, Lin, Ma, Po, Wang, Tian-Cong, Zhou, Dengke, Han, Jinlin, Men, Yunpeng, Wang, Fayin, Niu, Jiarui, Wang, Pei, Zhu, Weiwei, Zhang, Bing, Li, Di, Zou, Yuan-Chuan, Wang, Wei-Yang, Yang, Yuan-Pei, Wu, Qin, Gao, He, Lee, Ke-Jia, Luo, Jia-Wei, Luo, Rui, Tsai, Chao-Wei, Lin, Lin, Lu, Wanjin, Xie, Jintao, Fang, Jianhua, Cao, Jinhuang, Miao, Chen-Chen, Zhu, Yuhao, Chen, Yunchuan, Zhang, Yong-Kun, Cao, Shuo, Wu, Zi-Wei, Zhang, Chunfeng, Xu, Silu, Chen, Huaxi, Chen, Xiang-Lei, Cui, Xianghan, Feng, Yi, Huang, Yu-Xiang, Jing, Weicong, Li, Dong-Zi, Li, Jian, Li, Ye, Niu, Chen-Hui, Huang, Yong-Feng, Qu, Qingyue, Qu, Yuanhong, Wang, Bojun, Wang, Yi-Dan, Weng, Suming, Wu, Xuefeng, Xu, Heng, Yew, Shihan, Yang, Aiyuan, Yu, Wenfei, Zhang, Lei, Zhao, Rushuang
Format:	Preprint
Published:	2025
Subjects:	High Energy Astrophysical Phenomena
Online Access:	Acceder al recurso
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_version_	1866917170972196864
author	Zhang, Long-Xuan Tian, Shiyan Shen, Junyi Zhang, Jun-Shuo Zhou, Dejiang Zhou, Lin Ma, Po Wang, Tian-Cong Zhou, Dengke Han, Jinlin Men, Yunpeng Wang, Fayin Niu, Jiarui Wang, Pei Zhu, Weiwei Zhang, Bing Li, Di Zou, Yuan-Chuan Wang, Wei-Yang Yang, Yuan-Pei Wu, Qin Gao, He Lee, Ke-Jia Luo, Jia-Wei Luo, Rui Tsai, Chao-Wei Lin, Lin Lu, Wanjin Xie, Jintao Fang, Jianhua Cao, Jinhuang Miao, Chen-Chen Zhu, Yuhao Chen, Yunchuan Zhang, Yong-Kun Cao, Shuo Wu, Zi-Wei Zhang, Chunfeng Xu, Silu Chen, Huaxi Chen, Xiang-Lei Cui, Xianghan Feng, Yi Huang, Yu-Xiang Jing, Weicong Li, Dong-Zi Li, Jian Li, Ye Niu, Chen-Hui Huang, Yong-Feng Qu, Qingyue Qu, Yuanhong Wang, Bojun Wang, Yi-Dan Weng, Suming Wu, Xuefeng Xu, Heng Yew, Shihan Yang, Aiyuan Yu, Wenfei Zhang, Lei Zhao, Rushuang
author_facet	Zhang, Long-Xuan Tian, Shiyan Shen, Junyi Zhang, Jun-Shuo Zhou, Dejiang Zhou, Lin Ma, Po Wang, Tian-Cong Zhou, Dengke Han, Jinlin Men, Yunpeng Wang, Fayin Niu, Jiarui Wang, Pei Zhu, Weiwei Zhang, Bing Li, Di Zou, Yuan-Chuan Wang, Wei-Yang Yang, Yuan-Pei Wu, Qin Gao, He Lee, Ke-Jia Luo, Jia-Wei Luo, Rui Tsai, Chao-Wei Lin, Lin Lu, Wanjin Xie, Jintao Fang, Jianhua Cao, Jinhuang Miao, Chen-Chen Zhu, Yuhao Chen, Yunchuan Zhang, Yong-Kun Cao, Shuo Wu, Zi-Wei Zhang, Chunfeng Xu, Silu Chen, Huaxi Chen, Xiang-Lei Cui, Xianghan Feng, Yi Huang, Yu-Xiang Jing, Weicong Li, Dong-Zi Li, Jian Li, Ye Niu, Chen-Hui Huang, Yong-Feng Qu, Qingyue Qu, Yuanhong Wang, Bojun Wang, Yi-Dan Weng, Suming Wu, Xuefeng Xu, Heng Yew, Shihan Yang, Aiyuan Yu, Wenfei Zhang, Lei Zhao, Rushuang
contents	This study investigates the morphological classification and drifting rate measurement of the repeating fast radio burst (FRB) source FRB 20240114A using the Five-hundred-meter Aperture Spherical Telescope (FAST). Detected on January 14, 2024, FRB 20240114A exhibited an exceptionally high burst rate, revealing unique properties. Through observational campaigns over several months, we selected a dataset comprising 3,203 bursts (2,109 burst-clusters) during a continuous monitoring session (15,780 seconds) on March 12, 2024. Improving upon previous work, we clarify the definitions of sub-bursts, bursts and burst-clusters. Using an average dispersion measures (DM) of 529.2 pc cm$^{-3}$, we classified the burst-clusters into Downward Drifting, Upward Drifting, No Drifting, No Evidence for Drifting, Not-Clear, and Complex burst-clusters. Among the 978 burst-clusters that exhibit drifting behavior, 233 (23.82%) show upward drifting. Additionally, if 142 upward drifting single-component burst-clusters are excluded, upward drifting double- and multi-component burst-clusters still account for 10.89% of the 836 burst-clusters exhibiting drifting behavior, equating to 91 burst-clusters. Furthermore, if only upward drifting burst-clusters with consecutive time intervals (or upward drifting bursts) are considered, only 9 bursts remain. Drifting rate comparisons with other physical quantities reveal that the drifting rate increases with peak frequency for single-component burst-clusters with drifting behavior. Moreover, in single-component burst-clusters, those with upward drifting exhibit smaller effective widths, bandwidths, and fluxes than their downward drifting counterparts. A Kolmogorov-Smirnov test further indicates that upward drifting burst-clusters possess longer consecutive time intervals than downward drifting ones, suggesting distinct underlying physical mechanisms.
format	Preprint
id	arxiv_https___arxiv_org_abs_2507_14711
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Investigating FRB 20240114A with FAST: Morphological Classification and Drifting Rate Measurements in a Burst-Cluster Framework Zhang, Long-Xuan Tian, Shiyan Shen, Junyi Zhang, Jun-Shuo Zhou, Dejiang Zhou, Lin Ma, Po Wang, Tian-Cong Zhou, Dengke Han, Jinlin Men, Yunpeng Wang, Fayin Niu, Jiarui Wang, Pei Zhu, Weiwei Zhang, Bing Li, Di Zou, Yuan-Chuan Wang, Wei-Yang Yang, Yuan-Pei Wu, Qin Gao, He Lee, Ke-Jia Luo, Jia-Wei Luo, Rui Tsai, Chao-Wei Lin, Lin Lu, Wanjin Xie, Jintao Fang, Jianhua Cao, Jinhuang Miao, Chen-Chen Zhu, Yuhao Chen, Yunchuan Zhang, Yong-Kun Cao, Shuo Wu, Zi-Wei Zhang, Chunfeng Xu, Silu Chen, Huaxi Chen, Xiang-Lei Cui, Xianghan Feng, Yi Huang, Yu-Xiang Jing, Weicong Li, Dong-Zi Li, Jian Li, Ye Niu, Chen-Hui Huang, Yong-Feng Qu, Qingyue Qu, Yuanhong Wang, Bojun Wang, Yi-Dan Weng, Suming Wu, Xuefeng Xu, Heng Yew, Shihan Yang, Aiyuan Yu, Wenfei Zhang, Lei Zhao, Rushuang High Energy Astrophysical Phenomena This study investigates the morphological classification and drifting rate measurement of the repeating fast radio burst (FRB) source FRB 20240114A using the Five-hundred-meter Aperture Spherical Telescope (FAST). Detected on January 14, 2024, FRB 20240114A exhibited an exceptionally high burst rate, revealing unique properties. Through observational campaigns over several months, we selected a dataset comprising 3,203 bursts (2,109 burst-clusters) during a continuous monitoring session (15,780 seconds) on March 12, 2024. Improving upon previous work, we clarify the definitions of sub-bursts, bursts and burst-clusters. Using an average dispersion measures (DM) of 529.2 pc cm$^{-3}$, we classified the burst-clusters into Downward Drifting, Upward Drifting, No Drifting, No Evidence for Drifting, Not-Clear, and Complex burst-clusters. Among the 978 burst-clusters that exhibit drifting behavior, 233 (23.82%) show upward drifting. Additionally, if 142 upward drifting single-component burst-clusters are excluded, upward drifting double- and multi-component burst-clusters still account for 10.89% of the 836 burst-clusters exhibiting drifting behavior, equating to 91 burst-clusters. Furthermore, if only upward drifting burst-clusters with consecutive time intervals (or upward drifting bursts) are considered, only 9 bursts remain. Drifting rate comparisons with other physical quantities reveal that the drifting rate increases with peak frequency for single-component burst-clusters with drifting behavior. Moreover, in single-component burst-clusters, those with upward drifting exhibit smaller effective widths, bandwidths, and fluxes than their downward drifting counterparts. A Kolmogorov-Smirnov test further indicates that upward drifting burst-clusters possess longer consecutive time intervals than downward drifting ones, suggesting distinct underlying physical mechanisms.
title	Investigating FRB 20240114A with FAST: Morphological Classification and Drifting Rate Measurements in a Burst-Cluster Framework
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2507.14711