We review the current understanding of the Diffuse Gamma-Ray Background (DGRB). The
DGRB is what remains of the total measured gamma-ray emission after the subtraction of the …

BL Lac objects are active nuclei, hosted in massive elliptical galaxies, the emission of which
is dominated by a relativistic jet closely aligned with the line of sight. This implies the …

ABSTRACT The Baryon Oscillation Spectroscopic Survey (BOSS) is designed to measure
the scale of baryon acoustic oscillations (BAO) in the clustering of matter over a larger …

The 5th edition of the Roma-BZCAT Multifrequency Catalogue of Blazars is available in a
printed version and online at the ASDC website (http://www. asdc. asi. it/bzcat); it is also in …

The extragalactic background light (EBL) is of fundamental importance both for
understanding the entire process of galaxy evolution and for γ-ray astronomy, but the overall …

Attenuation of high-energy gamma-rays by pair production with ultraviolet, optical and
infrared (IR) extragalactic background light (EBL) photons provides a link between the …

We describe the parsec-scale kinematics of 200 active galactic nucleus (AGN) jets based on
15 GHz Very Long Baseline Array (VLBA) data obtained between 1994 August 31 and 2011 …

We present results from a parsec-scale jet kinematics study of 409 bright radio-loud active
galactic nuclei (AGNs) based on 15 GHz Very Long Baseline Array (VLBA) data obtained …

We study high-energy neutrino production in inner jets of radio-loud active galactic nuclei
(AGN), taking into account effects of external photon fields and the blazar sequence. We …

The third catalog of active galactic nuclei (AGNs) detected by the Fermi-LAT (3LAC) is
presented. It is based on the third Fermi-LAT catalog (3FGL) of sources detected between …