Intermediate-mass black holes (IMBHs), with masses in the range 1 0 0–1 0 6 M⊙, are the
link between stellar-mass BHs and supermassive BHs (SMBHs). They are thought to be the …

A significant fraction of nearby galaxies show evidence of weak nuclear activity unrelated to
normal stellar processes. Recent high-resolution, multiwavelength observations indicate that …

Recent multimessenger studies have provided evidence for high-energy neutrino sources
that are opaque to GeV–TeV gamma rays. We present model-independent studies on the …

We present the first catalog and data release of the Swift-BAT AGN Spectroscopic Survey.
We analyze optical spectra of the majority of the detected AGNs (77%, 642/836) based on …

We aim to constrain the evolution of active galactic nuclei (AGNs) as a function of
obscuration using an X-ray-selected sample of∼ 2000 AGNs from a multi-tiered survey …

The existence of ionized X-ray absorbing layers of gas along the line of sight to the nuclei of
Seyfert galaxies is a well established observational fact. This material is systematically …

We compile black hole (BH) masses for∼ 60,000 quasars in the redshift range 0.1\lesssim
z\lesssim 4.5 included in the Fifth Data Release of the Sloan Digital Sky Survey, using virial …

Star-forming galaxies are considered to be the leading candidate sources dominating
cosmic reionization at $ z\gt 7$: the search for analogs at moderate redshift showing Lyman …

We present an updated mid-infrared (MIR) versus X-ray correlation for the local active
galactic nuclei (AGN) population based on the high angular resolution 12 and 18μm …

We present new photometry of 16 local Seyferts including 6 Compton-thick sources in N-
band filters around 12-μm, obtained with the VISIR instrument on the 8-m Very Large …