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Discovery of 21 New Changing-Look AGNs in the Northern Sky

14 Sep 2018, 16:00 UTC
Discovery of 21 New Changing-Look AGNs in the Northern Sky
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Qian Yang et al 2018 ApJ 862 109
21 new changing-look active galactic nuclei — AGN that exhibit the appearance or disappearance of broad Balmer emission lines within a few years — have been discovered, doubling the number of these objects known.

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