论文标题
最经常出现的瞬态磁铁SGR J1935+2154的爆发特性
Burst properties of the most recurring transient magnetar SGR J1935+2154
论文作者
论文摘要
我们介绍了SGR J1935+2154的127次爆发的时间和时间集成光谱分析。在Fermi Gamma-ray空间望远镜上的伽马射线爆发监视器观察到了这些爆发，以及在源于2014年至2016年的四次活动性发作中，Neil Gehrels Swift天文台上的爆发警报望远镜。这种激活频率使SGR J1935+2154成为最爆炸的瞬时磁力。我们发现所有检测到的爆发的平均持续时间比典型的预期值短得多。我们使用两个黑体函数，一个组成的模型和其他三个更简单的模型拟合突发的时间集成光谱。 SGR J1935+2154的爆发具有与其他磁铁相似的光谱特性，除了来自组成模型的功率定律指数外，这与爆发通量相关。我们发现，爆发的持续时间和黑体温度都在四个主动发作中都显着发展。我们还发现，爆发时间历史显示了两种趋势，这与每次爆发的持续发射的衰减密切相关。
We present timing and time-integrated spectral analysis of 127 bursts from SGR J1935+2154. These bursts were observed with the Gamma-ray Burst Monitor on the Fermi Gamma-ray Space Telescope and the Burst Alert Telescope on the Neil Gehrels Swift Observatory during the source's four active episodes from 2014 to 2016. This activation frequency makes SGR J1935+2154 the most burst prolific transient magnetar. We find the average duration of all the detected bursts to be much shorter than the typical, anticipated value. We fit the burst time-integrated spectra with two black-body functions, a Comptonized model and three other simpler models. Bursts from SGR J1935+2154 exhibit similar spectral properties to other magnetars, with the exception of the power law index from the Comptonized model, which correlates with burst fluence. We find that the durations and both black-body temperatures of the bursts have significantly evolved across the four active episodes. We also find that the burst time history exhibits two trends, which are strongly correlated with the decay of the persistent emission in each outburst.
