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arXiv · 2502.15267

New insight into the Rapid Burster by Insight-HXMT

Y. P. Chen·S. Zhang·S. N. Zhang·L. Ji·L. D. Kong·P. J. Wang·L. Tao·M. Y. Ge·C. Z. Liu·F. J. Lu·J. L. Qu·T. P. Li·Y. P. Xu·X. L. Cao·Y. Chen·Q. C. Bu·C. Cai·Z. Chang·G. Chen·L. Chen·T. X. Chen·W. W. Cui·Y. Y. Du·G. H. Gao·H. Gao·M. Gao·Y. D. Gu·J. Guan·C. C. Guo·D. W. Han·Y. Huang·J. Huo·S. M. Jia·W. C. Jiang·J. Jin·B. Li·C. K. Li·G. Li·W. Li·X. Li·X. B. Li·X. F. Li·Z. W. Li·X. H. Liang·J. Y. Liao·B. S. Liu·H. W. Liu·H. X. Liu·X. J. Liu·X. F. Lu·Q. Luo·T. Luo·R. C. Ma·X. Ma·B. Meng·Y. Nang·J. Y. Nie·G. Ou·N. Sai·L. M. Song·X. Y. Song·L. Sun·Y. Tan·Y. L. Tuo·C. Wang·L. J. Wang·W. S. Wang·Y. S. Wang·X. Y. Wen·B. B. Wu·B. Y. Wu·M. Wu·G. C. Xiao·S. Xiao·S. L. Xiong·R. J. Yang·S. Yang·Y. J. Yang·Q. B. Yi·Q. Q. Yin·Y. You·F. Zhang·H. M. Zhang·J. Zhang·W. C. Zhang·W. Zhang·Y. Zhang·Y. F. Zhang·Y. H. Zhang·H. S. Zhao·X. F. Zhao·S. J. Zheng·Y. G. Zheng·D. K. Zhou
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Abstract

We report the timing and spectral analyses upon of the type II X-ray bursts from the Rapid Burster (MXB 1730--335) observed by Insight-HXMT and Swift/XRT. By stacking the long-duration bursts, we find for the first time that the hard X-rays are lagging than the soft X-rays by 3 seconds. However, such a lag is not visible for the short-duration bursts, probably because of the poor statistics. For all bursts the energy spectrum is found to be non-thermal, thanks to the broad band coverage of Insight-HXMT. These findings put new insights into the type-II bursts and require a temporally showing-up corona for possible interpretation.

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Y. P. Chen, S. Zhang, S. N. Zhang, L. Ji, L. D. Kong, P. J. Wang, L. Tao, M. Y. Ge, C. Z. Liu, F. J. Lu, J. L. Qu, T. P. Li, Y. P. Xu, X. L. Cao, Y. Chen, Q. C. Bu, C. Cai, Z. Chang, G. Chen, L. Chen, T. X. Chen, W. W. Cui, Y. Y. Du, G. H. Gao, H. Gao, M. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, Y. Huang, J. Huo, S. M. Jia, W. C. Jiang, J. Jin, B. Li, C. K. Li, G. Li, W. Li, X. Li, X. B. Li, X. F. Li, Z. W. Li, X. H. Liang, J. Y. Liao, B. S. Liu, H. W. Liu, H. X. Liu, X. J. Liu, X. F. Lu, Q. Luo, T. Luo, R. C. Ma, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, N. Sai, L. M. Song, X. Y. Song, L. Sun, Y. Tan, Y. L. Tuo, C. Wang, L. J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, B. Y. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, R. J. Yang, S. Yang, Y. J. Yang, Q. B. Yi, Q. Q. Yin, Y. You, F. Zhang, H. M. Zhang, J. Zhang, W. C. Zhang, W. Zhang, Y. Zhang, Y. F. Zhang, Y. H. Zhang, H. S. Zhao, X. F. Zhao, S. J. Zheng, Y. G. Zheng, D. K. Zhou. 2025-02-21. New insight into the Rapid Burster by Insight-HXMT. https://doi.org/10.3847/1538-4357%2Fabf4c4

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