论文标题
截止区域中的伽马射线光谱法作为理解辐射过程3C 279的关键
Gamma-ray spectrometry in the cutoff region as a key for the understanding of radiation processes in 3C 279
论文作者
论文摘要
我们基于在高和高能带中非常强的3C 279耀斑的观察结果介绍了光谱研究的结果，并讨论了它们对辐射机制起源的影响。 FSRQ 3C 279（Z = 0.536）是发射最发光的伽马射线AGN之一。在费米 - 拉特检测到的强耀斑期间，它显示出时间缩放到几分钟的变化。我们已经分析了2015年6月和2018年1月的耀斑期间的LAT和SWIFT-XRT数据，当时小时时间间隔期间的通量高于100 MEV，可能超过$ 3 \ times 10^{ - 5} $ ph cm $^{ - 2} $ s $ s $ s $^{ - 1} $。通常通过低能量电子和质子的反康普顿散射来解释，从具有光子指数〜1.5的非常硬光谱描述的迅速X射线观测结果得出的X射线通量。在这里，我们考虑了一种替代解释，该解释描述了从X射线到非常高的能量的整个频段，这是超相对论电子或质子同步发射的结果。
We present results of spectrometric studies based on the observations of very strong 3C 279 flares in high and very-high-energy bands and discuss their implications regarding the origin of radiation mechanisms. The FSRQ 3C 279 (z=0.536) is one of the most luminous gamma-ray emitting AGN. It shows variability on time scales down to minutes during strong flares detected by the Fermi-LAT. We have analyzed LAT and Swift-XRT data for the flaring periods in June 2015 and January 2018, when the flux above 100 MeV during hourly time intervals could exceed $3 \times 10^{-5}$ ph cm$^{-2}$ s$^{-1}$. The X-ray flux derived from Swift X-ray observations described by a very hard spectrum with photon index ~1.5 is typically explained by Inverse Compton scattering of low energy electrons and protons. Here we consider an alternative interpretation which describes the entire band from X-ray to very high energy as a results of synchrotron emission by ultra relativistic electrons or protons.
