2015, 2018-2021 sp. monitoring of NGC 5548
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NGC 5548 is one of the active galactic nuclei (AGNs) selected for our long-term spectroscopic monitoring with the Lijiang 2.4m telescope, aiming at investigating the origin and...
NGC 5548是我们依托丽江2.4米望远镜开展长期光谱监测项目所选取的活动星系核（active galactic nuclei，AGNs）之一，旨在探究其起源及……
