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arXiv · 2107.03800

Periodicity Search on X-ray Bursts of SGR J1935+2154 Using 8.5 yr of Fermi/GBM Data

Jin-Hang Zou·Bin-Bin Zhang·Guo-Qiang Zhang·Yu-Han Yang·Lang Shao·Fa-Yin Wang
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Abstract

We performed a systematic search for X-ray bursts of the SGR J1935+2154 using the Fermi Gamma-ray Burst Monitor continuous data dated from Jan 2013 to October 2021. Eight bursting phases, which consist of a total of 353 individual bursts, are identified. We further analyze the periodic properties of our sample using the Lomb-Scargle periodogram. The result suggests that those bursts exhibit a period of ~ 238 days with a ~ 63.2% duty cycle. Based on our analysis, we further predict two upcoming active windows of the X-ray bursts. Since July 2021, the beginning date of our first prediction has been confirmed by the ongoing X-ray activities of the SGR J1935+2154.

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Jin-Hang Zou, Bin-Bin Zhang, Guo-Qiang Zhang, Yu-Han Yang, Lang Shao, Fa-Yin Wang. 2021-07-08. Periodicity Search on X-ray Bursts of SGR J1935+2154 Using 8.5 yr of Fermi/GBM Data. https://doi.org/10.3847/2041-8213%2Fac3759

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