A Family Tree of Optical Transients from Narrow-line Seyfert 1 Galaxies
A Family Tree of Optical Transients from Narrow-line Seyfert 1 Galaxies
Abstract The Zwicky Transient Facility (ZTF) has discovered five events (0.01 < z < 0.4) belonging to an emerging class of active galactic nuclei (AGNs) undergoing smooth, large-amplitude, and rapidly rising flares. This sample consists of several transients initially classified as supernovae with narrow spectral lines. However, upon closer inspection, …