549 citations · 4.7k across the 118 of their papers we have counts for
6 papers · 1 filter
The relativistic jet of the -ray emitting narrow-line Seyfert 1 galaxy PKS J12220413
Daniel Kynoch, Hermine Landt, Martin J. Ward +5
We present a multi-frequency study of PKS J12220413 (4C04.42), currently the highest redshift -ray emitting narrow-line Seyfert 1 (-NLS1). We assemble a broad spectral…
Optical polarisation variability of radio loud narrow line Seyfert 1 galaxies. Search for long rotations of the polarisation plane
E. Angelakis, S. Kiehlmann, I. Myserlis +5
Narrow line Seyfert 1 galaxies (NLSy1s) constitute the AGN subclass associated with systematically smaller black hole masses. A few radio loud ones have been detected in MeV -- GeV…
Effelsberg Monitoring of a Sample of RadioAstron Blazars: Analysis of Intra-Day Variability
Jun Liu, Hayley Bignall, Thomas P. Krichbaum +6
We present the first results of an ongoing intra-day variability (IDV) flux density monitoring program of 107 blazars, which were selected from a sample of RadioAstron space very l…
Localizing the rays from blazar PKS 1502+106
Vassilis Karamanavis, L. Fuhrmann, T. P. Krichbaum +7
Blazars are among the most variable objects in the universe. They feature energetic jets of plasma that launch from the cores of these active galactic nuclei (AGN), triggering acti…
Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources
Planck Collaboration, J. Aatrokoski, P. A. R. Ade +246
Spectral energy distributions (SEDs) and radio continuum spectra are presented for a northern sample of 104 extragalactic radio sources, based on the Planck Early Release Compact S…
AGN astrophysics via multi-frequency monitoring of gamma-ray blazars in the Fermi-GST era
E. Angelakis, L. Fuhrmann, J. A. Zensus +10
The F-GAMMA-project is the coordinated effort of several observatories to understand the AGN phenomenon and specifically blazars via multi-frequency monitoring in collaboration wit…