ABSTRACT I review the radio to X‐ray properties of gigahertz peaked‐spectrum (GPS) and
compact steep‐spectrum (CSS) sources, the current hypotheses for their origin, and their …

The phenomenology of γ‐ray bright blazars can be accounted for by a sequence in the
source power and intensity of the diffuse radiation field surrounding the relativistic jet …

We study the properties of ultracompact jets in several prominent radio sources (Cygnus A,
3C309. 1, 3C345, 3C395, 4C39. 25, and 1038+ 528A), using the frequency dependence of …

We study the entire sample of quasars detected above 100 MeV (by the EGRET instrument),
on board CGRO. We find that the γ-ray luminosity correlates better with the radio luminosity …

The energy spectrum of the active galactic nucleus Markarian 501 has been determined
from 0.3 to 10 TeV with the Whipple Observatory Cerenkov Imaging Telescope, by using …

The results of the optical monitoring between November 1994 and November 1995 of twenty
γ-ray loud blazars included in the Torino blazar monitoring program are presented. All data …

Using multiwave band data for 61-rayloud blazars (17 BL Lacertae objects and 44 flat-
spectrum radio quasars [FSRQs]), we have studied the possible correlation between flux …

We present the X-ray properties of a sample of 17 radio sources observed with the Chandra
X-ray Observatory as part of a project aimed at studying the X-ray emission from their radio …

We investigate the hypothesis that the parsec-scale jets observed in extragalactic objects
consist of an electron–positron () pair plasma outflowing from the compact. X-ray emitting …

In this work, we investigated the X-ray emission for a sample of young radio active galactic
nuclei (AGNs) by combining data from Chandra/XMM–Newton with data for other …