1,484 datasets found

Compton-thick active galactic nuclei (CT-AGNs), defined by column density N_H_>=1.5x10^24^cm^-2^, are so heavily absorbed that their X-ray emission is often feeble, even...

Although the population of quasars evolved significantly in the past, the properties of quasars as physical objects are supposed to remain almost unchanged, which makes quasars...

Our aim is to increase the limited number of quasars behind M 31, necessary for probing the chemical content of the gas and for proper motion reference, with reliable and...

The Faint Object Camera (FOC) on board the Hubble Space Telescope (HST) acquired high-resolution spatially resolved polarimetric images of nearby active galactic nuclei (AGNs)...

Tidal disruption events (TDEs) have been proposed as valuable laboratories for studying dormant black holes. However, progress in this field has been hampered by the limited...

We conducted an extensive identification and analysis of various morphological classes and subclasses of radio galaxies using the latest high-resolution data from the second...

The archive of AGN spectral observations is obtained on AZT-8 telescope at the Fesenkov Astrophysical Institute (FAI), Almaty, Kazakhstan. It represents the result of...

Changing-state active galactic nuclei (CSAGNs) exhibit rapid variability, with mass accretion rates that can change by several orders of magnitude in a few years. This provides...

The European Archive of the James Webb Space Telescope (eJWST) provides access to all data collected by The James Webb Space Telescope (JWST). JWST's capabilities span from...

We present an analysis of the X-ray active galactic nucleus (AGN) population in a sample of seven massive galaxy clusters in the redshift range 0.35<z<0.45. We utilize...

The Subarcsecond mid-infrared (MIR) atlas of local active galactic nuclei (AGN) is a collection of all available N- and Q-band images obtained at ground-based 8-meter class...

The First Byurakan Survey (FBS) is the largest and the first systematic objective prism survey of the extragalactic sky. It covers 17,000 sq.deg. in the Northern sky together...

description: VOEvent alerts produced from transient detections resulting from observations with the NASA Fermi Large Area Telescope. Events should be reported within tens to of...

To date, three nuclear transients have been associated with high-energy neutrino events. These transients are generally thought to be powered by tidal disruptions of stars...

We investigated the interplay between dense molecular gas, star formation, and active galactic nucleus (AGN) feedback in the luminous IR galaxy NGC 1068 at sub-kiloparsec...

The nearby dwarf galaxy POX 52 at z=0.021 hosts an active galactic nucleus (AGN) with a black hole (BH) mass of M_BH_~10^5-6^M_{sun} and an Eddington ratio of ~0.1-1. This...

We investigate the role of galactic bars in fuelling and triggering Active Galactic Nucleus (AGN) in disc galaxies up to z~0.8. We utilise a Deep Learning model, fine-tuned on...

The fundamental plane of black hole activity describes the correlation between radio luminosity (L_R_), X-ray luminosity (L_X_), and black hole mass (M_BH_). It reflects a...

These FITS images were generated with the IDL package MIRphot [Asmus2014] by extraction (and combination) of the sub-images from the chopped/nodded total images from COMICS,...

First Byurakan survey plate scan service