GECAM discovery of the second FRB-associated magnetar X-ray burst from SGR J1935+2154

ABSTRACT Fast radio burst (FRB) is mysterious phenomenon with millisecond-duration radio pulses observed mostly from cosmological distance. The association between FRB 200428 and a magnetar X-ray burst (MXB) from SGR J1935+2154 has significantly advanced the understanding of FRB and magnetar bursts. However, it is uncertain whether this association between MXB and FRB (i.e. MXB/FRB 200428) is genuine or just coincidental only based on this single event. Here we report the discovery of a bright ($\rm {\sim} 7.6\times 10^{-7}\, erg \cdot cm^{-2}$ in 1–250 keV) magnetar X-ray burst detected by Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) on 2022 October 14 (dubbed as MXB 221014) from SGR J1935+2154, which is associated with an FRB detected by Canadian Hydrogen Intensity Mapping Experiment and Green Bank Telescope. We conducted a detailed temporal and spectral analysis of MXB 221014 with GECAM data and find that it is a bright and typical ($T_{90}\sim$250 ms) X-ray burst from this magnetar. Interestingly, we find two narrow X-ray pulses in the MXB, one of which temporally aligns with the main pulse of the FRB 221014 ${\sim} 5.70$ ms latter than the peak time of FRB 221014), resembling the feature found in MXB/FRB 200428. Furthermore, we did comprehensive comparison between MXB/FRB 221014 and MXB/FRB 200428, and find that while the two events share several common features, they also exhibit distinct differences, highlighting the variety of the MXB–FRB association morphology. This finding not only confirms the association between MXB and FRB but also provides new insights into the mechanism of and the relationship between FRB and MXB.

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Publication Details

Journal
Monthly Notices of the Royal Astronomical Society
Published
2026-02-14
DOI
https://doi.org/10.1093/mnras/stag312
Citations
1
Primary Topic
Pulsars and Gravitational Waves Research
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article
Field-Weighted Citation Impact
23.83
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GECAM discovery of the second FRB-associated magnetar X-ray burst from SGR J1935+2154

Sheng-Lun Xie, P. F. Wang, Wenxi Peng, D. Y. Guo et al.
1 citations
Monthly Notices of the Royal Astronomical Society
Pulsars and Gravitational Waves Research
23.83
article

GECAM discovery of the second FRB-associated magnetar X-ray burst from SGR J1935+2154

Sheng-Lun Xie, P. F. Wang, Wenxi Peng, D. Y. Guo, Pei-Yi Feng, Chen-Wei Wang, Xinqiao Li, D. Li, P Zhang, Y. P. Wang, Yi Zhao, J. B. Zhang, Wenjun Tan, X. F. Li, Yukun Ren, B. Li, Siqi Zheng, Xiaojing Liu, Yaqing Liu, Dali Zhang, Chao Zheng, Fan Zhang, Zhenghua An, Zheng-Hang Yu, Xi-Lei Sun, Min Gao, Sheng Yang, Shuo XIAO, J. He, Jinzhou Wang, Xiao‐Yun Zhao, Xiang-Yang Wen, Rui Qiao, Jia-Cong Liu, Qi-Bin Yi, Shu-Xu Yi, Cheng-Kui Li, Jin Wang, Ke Gong, Xiang Ma, Zhen Zhang, Wen-Long Zhang, Yan-Qiu Zhang, Hao-Xuan Guo, Yue Huang, Ming-Yu Ge, Ce Cai
article en
1 citations

Abstract

ABSTRACT Fast radio burst (FRB) is mysterious phenomenon with millisecond-duration radio pulses observed mostly from cosmological distance. The association between FRB 200428 and a magnetar X-ray burst (MXB) from SGR J1935+2154 has significantly advanced the understanding of FRB and magnetar bursts. However, it is uncertain whether this association between MXB and FRB (i.e. MXB/FRB 200428) is genuine or just coincidental only based on this single event. Here we report the discovery of a bright ($\rm {\sim} 7.6\times 10^{-7}\, erg \cdot cm^{-2}$ in 1–250 keV) magnetar X-ray burst detected by Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) on 2022 October 14 (dubbed as MXB 221014) from SGR J1935+2154, which is associated with an FRB detected by Canadian Hydrogen Intensity Mapping Experiment and Green Bank Telescope. We conducted a detailed temporal and spectral analysis of MXB 221014 with GECAM data and find that it is a bright and typical ($T_{90}\sim$250 ms) X-ray burst from this magnetar. Interestingly, we find two narrow X-ray pulses in the MXB, one of which temporally aligns with the main pulse of the FRB 221014 ${\sim} 5.70$ ms latter than the peak time of FRB 221014), resembling the feature found in MXB/FRB 200428. Furthermore, we did comprehensive comparison between MXB/FRB 221014 and MXB/FRB 200428, and find that while the two events share several common features, they also exhibit distinct differences, highlighting the variety of the MXB–FRB association morphology. This finding not only confirms the association between MXB and FRB but also provides new insights into the mechanism of and the relationship between FRB and MXB.

Monthly Notices of the Royal Astronomical SocietyVol. 546(4)
Tongji University (CN), Guizhou Normal University (CN), Qufu Normal University (CN), Central China Normal University (CN), Institute of High Energy Physics (CN), Sichuan Research Center of New Materials (CN), University of Chinese Academy of Sciences (CN), Dezhou University (CN), Xiangtan University (CN), Southwest Jiaotong University (CN), Xi'an Jiaotong University (CN), Hebei Normal University (CN), Tsinghua University (CN)
Openalex Percentile: Top 1%
Pulsars and Gravitational Waves Research
23.83
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