248 citations · 663 across the 16 of their papers we have counts for
18 papers
Gamma-ray emission in radio galaxies under the VLBI scope -- II. The relationship between gamma-ray emission and parsec-scale jets in radio galaxies
R. Angioni, E. Ros, M. Kadler +22
Following our study of the radio and high-energy properties of -ray-emitting radio galaxies, here we investigate the kinematic and spectral properties of the parsec-scale jets o…
TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources
C. Müller, M. Kadler, R. Ojha +31
TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of -30deg declination including high-resolution Very Long Baseline Interferometry (VLBI) imaging,…
First Multi-wavelength Campaign on the Gamma-ray-loud Active Galaxy IC 310
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +160
The extragalactic VHE gamma-ray sky is rich in blazars. These are jetted active galactic nuclei viewed at a small angle to the line-of-sight. Only a handful of objects viewed at a…
Stacked search for time shifted high energy neutrinos from gamma ray bursts with the ANTARES neutrino telescope
ANTARES Collaboration, S. Adrian-Martínez, A. Albert +118
A search for high-energy neutrino emission correlated with gamma-ray bursts outside the electromagnetic prompt-emission time window is presented. Using a stacking approach of the t…
Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event
M. Kadler, F. Krauß, K. Mannheim +40
The discovery of extraterrestrial very-high-energy neutrinos by the IceCube collaboration has launched a quest for the identification of their astrophysical sources. Gamma-ray blaz…
NuSTAR and XMM-Newton Observations of the Hard X-Ray Spectrum of Centaurus A
F. Fuerst, C. Mueller, K. K. Madsen +28
We present simultaneous XMM-Newton and NuSTAR observations spanning 3-78 keV of the nearest radio galaxy, Centaurus A (Cen A). The accretion geometry around the central engine in C…
A redshifted Fe K line from the unusual gamma-ray source PMN J1603-4904
C. Müller, F. Krauß, T. Dauser +12
Multiwavelength observations have revealed the highly unusual properties of the gamma-ray source PMN J1603-4904, which are difficult to reconcile with any other well established ga…
Constraining the neutrino emission of gravitationally lensed Flat-Spectrum Radio Quasars with ANTARES data
S. Adrián-Martínez, A. Albert, M. André +134
This paper proposes to exploit gravitational lensing effects to improve the sensitivity of neutrino telescopes to the intrinsic neutrino emission of distant blazar populations. Thi…
Unusual Flaring Activity in the Blazar PKS 1424-418 during 2008-2011
S. Buson, F. Longo, S. Larsson +24
Context. Blazars are a subset of active galactic nuclei (AGN) with jets that are oriented along our line of sight. Variability and spectral energy distribution (SED) studies are cr…
A Search for Time Dependent Neutrino Emission from Microquasars with the ANTARES Telescope
S. Adrián-Martínez, A. Albert, M. André +143
Results are presented on a search for neutrino emission from a sample of six microquasars, based on the data collected by the ANTARES neutrino telescope between 2007 and 2010. By m…
Multi-Wavelength Observations of PKS 2142-75 during Active and Quiescent Gamma-Ray States
Michael Dutka, Roopesh Ojha, Katja Pottschmidt +13
PKS2142-75 (a.k.a. 2FGL J2147.4-7534) is a flat-spectrum radio quasar that was observed quasi-simultaneously by a suite of instruments across the elec- tromagnetic spectrum during…
A Search for Neutrino Emission from the Fermi Bubbles with the ANTARES Telescope
ANTARES Collaboration, S. Adrián-Martínez, A. Albert +147
Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadro…
The Gamma-Ray Blazar PKS 0208-512, a Multi-Wavelength Investigation
J. M. Blanchard, J. E. J. Lovell, J. Dickey +8
The gamma-ray blazar PKS 0208-512 has shown strong periods of flaring, at all frequencies from radio to gamma-ray. This has led to its inclusion in the TANAMI project, which tracks…
Structural variability of 3C 111 on parsec scales
C. Großberger, M. Kadler, J. Wilms +15
We discuss the parsec-scale structural variability of the extragalactic jet 3C 111 related to a major radio flux density outburst in 2007. The data analyzed were taken within the s…
Twelve and a Half Years of Observations of Centaurus A with RXTE
Richard E. Rothschild, Alex Markowitz, Elizabeth Rivers +5
The Rossi X-ray Timing Explorer has observed the nearest radio galaxy, Centaurus A, in 13 intervals from 1966 August to 2009 February over the 3--200 keV band. Spectra accumulated…
Sub-parsec scale imaging of Centaurus A
Cornelia Müller, M. Kadler, R. Ojha +6
At a distance of about 3.8 Mpc, the radio galaxy Centaurus A is the closest active galaxy. Therefore it is a key target for studying the innermost regions of active galactic nuclei…
Fermi Large Area Telescope View of the Core of the Radio Galaxy Centaurus A
Fermi Collaboration, A. Falcone, H. Hase +2
We present gamma-ray observations with the LAT on board the Fermi Gamma-Ray Telescope of the nearby radio galaxy Centaurus~A. The previous EGRET detection is confirmed, and the loc…
TANAMI: Milliarcsecond Resolution Observations of Extragalactic Gamma-ray Sources
Roopesh Ojha, M. Kadler, M. Böck +24
The TANAMI (Tracking AGN with Austral Milliarcsecond Interferometry) and associated programs provide comprehensive radio monitoring of extragalactic gamma-ray sources south of decl…