论文标题
Insight-HXMT专用于SGR J1935+2154 II的33天观察。爆发光谱目录
Insight-HXMT dedicated 33-day observation of SGR J1935+2154 II. Burst Spectral Catalog
论文作者
论文摘要
自2020年4月28日以来，Insight-HXMT对Magnetar SGR J1935+2154实施了专门的观察。得益于宽广的能量带（1-250 KEV）和Insight-HXMT的高灵敏度，我们在FRB 200428发射后为期一个月的活动中获得了SGR J1935+2154的75次爆发。在这里，我们报告了这些详细的时间融合光谱分析这些爆发和这些光谱参数的统计分布。我们发现，对于SGR J1935+2154爆发的15％（11/75），CPL模型是首选的，其中大多数发生在此活动时期的后半部分。在累积的通量分布中，我们发现样品中爆发的爆发量大约比费米/GBM弱的数量级弱，但遵循相同的功率定律分布。最后，我们发现与与FRB 200428相关的X射线爆发的峰值能量相似的爆发（FRB 200428相关爆发），但低能指数更难。
Since April 28, 2020, Insight-HXMT has implemented a dedicated observation on the magnetar SGR J1935+2154. Thanks to the wide energy band (1-250 keV) and high sensitivity of Insight-HXMT, we obtained 75 bursts from SGR J1935+2154 during a month-long activity episode after the emission of FRB 200428. Here, we report the detailed time-integrated spectral analysis of these bursts and the statistical distribution of the spectral parameters. We find that for 15%(11/75) of SGR J1935+2154 bursts, the CPL model is preferred, and most of them occurred in the latter part of this active epoch. In the cumulative fluence distribution, we find that the fluence of bursts in our sample is about an order of magnitude weaker than that of Fermi/GBM, but follows the same power law distribution. Finally, we find a burst with similar peak energy to the time-integrated spectrum of the X-ray burst associated with FRB 200428 (FRB 200428-Associated Burst), but the low energy index is harder.
