We have conducted a multiwavelength survey of 42 radio loud narrow-1ine Seyfert 1
galaxies (RLNLS1s), selected by searching among all the known sources of this type and …

Before the launch of the Fermi Gamma-ray Space Telescope satellite only two classes of
active galactic nuclei (AGN) were known to generate relativistic jets and thus to emit up to …

We investigate the mid-infrared (mid-IR) properties of the largest (42 objects) sample of
radio-loud narrow-line Seyfert 1 (RL NLS1) collected to date, using data from the Wide-field …

It is known that some active galactic nuclei (AGNs) transit from Type 1 to Type 2 or vice
versa. There are two explanations for the so-called changing-look AGNs: one is the dramatic …

We present optical and near-infrared (NIR) imaging data of the radio-loud, narrow-line
Seyfert 1 galaxy 1H 0323+ 342, which shows intense and variable gamma-ray activity …

We report on the identification of a new γ-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy,
SDSS J122222. 55+ 041315.7, which increases the number of known objects of this …

We present a multiwavelength study of the radio-loud narrow-line Seyfert 1 galaxy (NLSy1)
1H 0323+ 342, detected by the Fermi Gamma-Ray Space Telescope. Multiband light curves …

Tidal disruption events (TDEs) in active galactic nuclei (AGNs) have been overlooked for a
long time but have recently been tentatively investigated. We report the discovery of a long …

We report the detection of a significant infrared variability of the nearest tidal disruption event
(TDE) ASASSN-14li using Wide-field Infrared Survey Explorer and newly released Near …

Radio-loud Narrow-line Seyfert 1 (NLS1) galaxies are unique probes of the formation of
powerful radio jets at extreme (near-Eddington) accretion rates and low black hole masses …