This article reviews the recent observational results regarding γ-ray emission from active galaxies. The most numerous discrete extragalactic γ-ray sources are AGNs dominated by relativistic jets pointing in our direction (commonly known as blazars), and they are the main subject of the review. They are detected in all observable energy bands and are highly variable. The advent of the sensitive γ-ray observations, afforded by the launch and continuing operation of the Fermi Gamma-ray Space Telescope and the AGILE Gamma-ray Imaging Detector, as well as by the deployment of current-generation Air Cerenkov Telescope arrays such as VERITAS, MAGIC, and HESS-II, continually provides sensitive γ-ray data over the energy range of ∼100 MeV to multi-TeV. Importantly, it has motivated simultaneous, monitoring observations in other bands, resulting in unprecedented time-resolved broadband spectral coverage. After an introduction, in Sections 3, 4, and 5, we cover the current status and highlights of γ-ray observation...

中文翻译：

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活动星系核的伽马射线观测

本文回顾了近期活动星系γ射线发射的观测结果。数量最多的离散河外 γ 射线源是由指向我们方向的相对论喷流（通常称为耀变体）主导的 AGN，它们是本综述的主要主题。它们在所有可观察的能带中都被检测到，并且变化很大。费米伽马射线太空望远镜和 AGILE 伽马射线成像探测器的发射和持续运行，以及当代航空切伦科夫望远镜阵列的部署，提供了灵敏的 γ 射线观测VERITAS、MAGIC 和 HESS-II 在 100 MeV 到多 TeV 的能量范围内持续提供敏感的 γ 射线数据。重要的是，它激发了其他频段的同步监测观测，导致前所未有的时间分辨宽带频谱覆盖。在介绍之后，在第 3、4 和 5 节中，我们介绍了 γ 射线观测的现状和亮点……