论文标题
候选中微子发射Blazar BZB J0955+3551的多频观测
Multi-Frequency Observations of the Candidate Neutrino Emitting Blazar BZB J0955+3551
论文作者
论文摘要
Blazar TXS 0506+056与检测到的中微子事件IC-170922A的最新空间和时间巧合为COSMIC-RAY加速的可靠位点开放了一个多通讯天文学的领域。在TXS 0506+056之后，最近发现第二次BLAZAR BZB J0955+3551与检测到的Icecube检测到的中微子事件IC-200107A在空间上是一致的，并经历了到目前为止测量的最亮的X射线火焰。在这里，我们介绍了我们的多频活动的结果，以研究这一特殊事件，其中包括与Nustar，Swift，Meter和10.4 M Gran Telescopio Canarias（GTC）的观察结果。 GTC的光谱观察结果将其红移确保为$ z = 0.55703^{+0.00033} _ { - 0.00021} $，中央黑洞质量为10 $^{8.90 \ pm0.16} 〜M _ {\ odot} $。 Nustar和更好的数据都揭示了迅速变化的可变性，尽管在低意义上（$ \lyssim3.5σ$）。我们使用分析计算探索了光杆生产所需的目标光子场的起源，并考虑了观察到的光学到X射线通量水平。我们得出的结论是，种子光子可能起源于射流外部，类似于TXS 0506+056报告的种子光子，尽管无法排除的场景调用了共同移动的目标光子场（例如，电子同步）。来自中微子产生的光 - 磁过程的电磁输出可能仅对观察到的光谱能分布做出亚基贡献，这表明X射线燃烧事件可能与IC-200107A直接连接。
The recent spatial and temporal coincidence of the blazar TXS 0506+056 with the IceCube detected neutrino event IC-170922A has opened up a realm of multi-messenger astronomy with blazar jets as a plausible site of cosmic-ray acceleration. After TXS 0506+056, a second blazar, BZB J0955+3551, has recently been found to be spatially coincident with the IceCube detected neutrino event IC-200107A and undergoing its brightest X-ray flare measured so far. Here, we present the results of our multi-frequency campaign to study this peculiar event that includes observations with the NuSTAR, Swift, NICER, and 10.4 m Gran Telescopio Canarias (GTC). The optical spectroscopic observation from GTC secured its redshift as $z=0.55703^{+0.00033}_{-0.00021}$ and the central black hole mass as 10$^{8.90\pm0.16}~M_{\odot}$. Both NuSTAR and NICER data reveal a rapid flux variability albeit at low-significance ($\lesssim3.5σ$). We explore the origin of the target photon field needed for the photo-pion production using analytical calculations and considering the observed optical-to-X-ray flux level. We conclude that seed photons may originate from outside the jet, similar to that reported for TXS 0506+056, although a scenario invoking a co-moving target photon field (e.g., electron-synchrotron) can not be ruled out. The electromagnetic output from the neutrino-producing photo-hadronic processes are likely to make only a sub-dominant contribution to the observed spectral energy distribution suggesting that the X-ray flaring event may not be directly connected with IC-200107A.
