标题： 耀发活动星系核：费米- LAT 的视角 显示英文标题

标题： Flaring Active Galactic Nuclei: the view from Fermi-LAT

摘要： 活动星系核（AGNs）在整个电磁波谱上表现出变化，不同频率上有不同的爆发事件。费米卫星上的大面积望远镜具有高灵敏度和几乎均匀的天空覆盖范围，使其成为监测大量AGNs在长时间尺度上的强大工具。这使我们能够在伽马射线中检测到几个爆发的AGNs，并针对这些源从射电到TeV能量进行专门的多频段观测，以改善我们对发射区域的位置、结构和动力学以及AGNs中粒子加速机制的理解。我们讨论了两个不同爆发AGNs的结果：平坦光谱射电类星体3C 279和射电明亮的窄线塞弗特1型PMN J0948+0022。 显示英文摘要

摘要： Active galactic nuclei (AGNs) exhibit variability across the entire electromagnetic spectrum with distinct flaring episodes at different frequencies. The high sensitivity and nearly uniform sky coverage of the Large Area Telescope on board the Fermi satellite make it a powerful tool for monitoring a large number of AGNs over long timescales. This allowed us to detect several flaring AGNs in gamma rays, triggering dedicated multifrequency campaigns on these sources from radio to TeV energies in order to improve our understanding on location, structure and dynamics of the emitting regions, and on particle acceleration mechanisms in AGNs. We discuss the results for two different flaring AGNs: the flat spectrum radio quasar 3C 279 and the radio-loud narrow-line Seyfert 1 PMN J0948+0022.