论文标题
Blazar S5 1803+78的多波长时间和光谱分析
Multi-wavelength temporal and spectral analysis of Blazar S5 1803+78
论文作者
论文摘要
Blazars是一类AGN，他们的喷气机之一指向地球。在这里，我们报告了MJD 58727至MJD 59419之间的Blazar S5 1803+78的多波长研究。我们分析了Fermi-Lat收集的$γ$ ray数据，由Swift-Xrt \＆Nustar收集的X射线数据，由Swift-Xrt \＆Nustar，由Swift-swift-nustar，由Swift-swift-tovility obs vurkeevevevevever \ turkeev furnkeevevevevever \ turkeev cobs obs in usbitev。通过分析$γ$ - 射线光曲线来确定三个耀斑的状态。在整个耀斑中观察到日标的变异性，相似的上升和衰减时间表明，紧凑的发射区域位于中央发动机附近。互相关研究是在$γ$ ray，无线电和X射线带之间进行的，未检测到显着相关性。 $γ$ ray和光学发射与零时间滞后显着相关，这表明它们的共同空间起源。观察到R-I指数与V幅度之间的显着正相关。对所有耀斑发作以及一个静态状态进行了宽带光谱能量分布（SED）建模以进行比较。 SED在单区Leptonic方案下最好地搭配同步型康普顿（SSC）模型。 SED建模表明，要解释高爆炸状态强的多普勒升高。
Blazars are a class of AGN, one of their jets is pointed towards the earth. Here, we report about the multi-wavelength study for blazar S5 1803+78 between MJD 58727 to MJD 59419. We analysed $γ$-ray data collected by Fermi-LAT, X-ray data collected by Swift-XRT \& NuSTAR, optical photons detected by Swift-UVOT \& TUBITAK observatory in Turkey. Three flaring states are identified by analysing the $γ$-ray light curve. A day scale variability is observed throughout the flares with the similar rise and decay times suggesting a compact emission region located close to the central engine. Cross-correlation studies are carried out between $γ$-ray, radio, and X-ray bands, and no significant correlation is detected. The $γ$-ray and optical emission are significantly correlated with zero time lag suggesting a co-spatial origin of them. A significant positive correlation between the R-I index and the V magnitude is observed. The broadband spectral energy distributions (SEDs) modeling was performed for all the flaring episodes as well as for one quiescent state for comparison. SEDs are best fitted with the synchrotron-self Compton (SSC) model under a one-zone leptonic scenario. The SED modeling shows that to explain the high flaring state strong Doppler boosting is required.
