论文标题
伽马射线发射窄线塞弗特1个星系：迅速的视图
Gamma-ray-emitting narrow-line Seyfert 1 galaxies: the Swift view
论文作者
论文摘要
我们报告了对2019年4月$γ$ - 发射窄线Seyfert 1 Galaxies（NLSY1）的所有SWIFT观察结果的分析。 X射线照明（和通量）的分布表明，射流辐射显着有助于其X射线发射，多普勒的增加使值高于其他Radio-Loud-Loud NLSY1。相对于无线电价和无线电大通NLSY1，平均而言，0.3-10 KEV光子指数更加困难，这证实了X射线中的主要喷射贡献。然而，在某些时期，相对于大麻的变化幅度较低，并且光谱的软化表明，电晕辐射也有助于X射线发射。在光学和紫外线（UV）中，已经在每日，每周和每月的时间尺度上观察到了显着的通量变化，从而明确表明了射流辐射在Spectrum的这一部分的显着贡献。在1H 0323+342，SBS 0846+513，PMN J0948+0022中观察到X射线，紫外线和光学发射与同时通量变化之间的密切相关性，如射流辐射是主要的机制。相关的多次变异性有利于FBQS J1644+2619和PKS 2004-447中的喷射为主的方案。 1H 0323+342，SBS 0846+513，PMN J0948+0022和FBQS J1644+2619的总X射线望远镜光谱，SBS 0846+513，PMN J0948+0022和FBQS J1644+2619非常适合损坏的功率定律，并在2 keV左右左右。正如硬光子指数所建议的那样，高于2 keV的光谱由光束相对论射流的非热发射主导。在2 KEV以下观察到了类似Seyfert的特征，例如Soft X射线过量的多余功能，这使得这些$γ$ ray-ray的NLSY1与典型的Blazars不同。
We report the analysis of all Swift observations available up to 2019 April of $γ$-ray-emitting narrow-line Seyfert 1 galaxies (NLSy1). The distribution of X-ray luminosities (and fluxes) indicates that the jet radiation significantly contributes to their X-ray emission, with Doppler boosting making values higher than other radio-loud NLSy1. The 0.3-10 keV photon indices are on average harder with respect to radio-quiet and radio-loud NLSy1, confirming a dominant jet contribution in X-rays. However, the lower variability amplitude with respect to blazars and the softening of the spectrum in some periods suggests that also the corona radiation contributes to the X-ray emission. In optical and ultraviolet (UV) significant flux changes have been observed on daily, weekly, and monthly time-scale, providing a clear indication of the significant contribution of the jet radiation in this part of spectrum. A strong correlation between X-ray, UV, and optical emission and simultaneous flux variations have been observed in 1H 0323+342, SBS 0846+513, PMN J0948+0022 as expected in case the jet radiation is the dominant mechanism. Correlated multiband variability favours the jet-dominated scenario also in FBQS J1644+2619 and PKS 2004-447. The summed X-ray Telescope spectra of 1H 0323+342, SBS 0846+513, PMN J0948+0022, and FBQS J1644+2619 are well fitted by a broken power law with a break around 2 keV. The spectrum above 2 keV is dominated by the non-thermal emission from a beamed relativistic jet, as suggested by the hard photon index. A Seyfert-like feature like the soft X-ray excess has been observed below 2 keV, making these $γ$-ray-emitting NLSy1 different from typical blazars.
