248 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Hartebeesthoek Radio Astronomy ObservatoryZA18 papers
- Max Planck Institute for Radio AstronomyDE17 papers
- University of TasmaniaAU17 papers
- Goddard Space Flight CenterUS16 papers
- Commonwealth Scientific and Industrial Research OrganisationAU14 papers
- Friedrich-Alexander-Universität Erlangen-NürnbergDE14 papers
- University of WürzburgDE14 papers
- Astronomy and SpaceAU12 papers
- Catholic University of AmericaUS12 papers
- Universitat de ValènciaES11 papers
- University of Maryland, Baltimore CountyUS11 papers
- Radboud University NijmegenNL8 papers
28 papers
The QTF-Backbone: Proposal for a Nationwide Optical Fibre Backbone in Germany for Quantum Technology and Time and Frequency Metrology
Tara Cubel Liebisch, Peter Kaufmann, Harald Schnatz +166
The recent breakthroughs in the distribution of quantum information and high-precision time and frequency (T&F) signals over long-haul optical fibre networks have transformative po…
A Collection of German Science Interests in the Next Generation Very Large Array
M. Kadler, D. A. Riechers, J. Agarwal +88
The Next Generation Very Large Array (ngVLA) is a planned radio interferometer providing unprecedented sensitivity at wavelengths between 21 cm and 3 mm. Its 263 antenna element ar…
A monitoring campaign (2013-2020) of ESA's Mars Express to study interplanetary plasma scintillation
P. Kummamuru, G. Molera Calvés, G. Cimò +19
The radio signal transmitted by the Mars Express (MEX) spacecraft was observed regularly between the years 2013-2020 at X-band (8.42 GHz) using the European Very Long Baseline Inte…
VGOS VLBI Intensives between MACGO12M and WETTZ13S for the rapid determination of UT1-UTC
Matthias Schartner, Leonid Petrov, Christian Plötz +3
In this work, we present a status update and results of the designated research and development VLBI Intensive program VGOS-INT-S, observed between MACGO12M and WETTZ13S for the ra…
Detecting the oscillation and propagation of the nascent dynamic solar wind structure at 2.6 solar radii using VLBI radio telescopes
Maoli Ma, Guifre Molera Calves, Giuseppe Cimo +29
Probing the solar corona is crucial to study the coronal heating and solar wind acceleration. However, the transient and inhomogeneous solar wind flows carry large-amplitude inhere…
Overcoming 1 part in of Earth angular rotation rate measurement with the G Wettzell data
A. D. V. Di Virgilio, G. Terreni, A. Basti +8
The absolute measurement of the Earth angular rotation rate with ground-based instruments becomes challenging if the 1 part in of precision has to be obtained. This threshol…
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…
Counting of Grapevine Berries in Images via Semantic Segmentation using Convolutional Neural Networks
Laura Zabawa, Anna Kicherer, Lasse Klingbeil +3
The extraction of phenotypic traits is often very time and labour intensive. Especially the investigation in viticulture is restricted to an on-site analysis due to the perennial n…
Gamma-ray emission in radio galaxies under the VLBI scope -- I. Parsec-scale kinematics and high-energy properties of -ray detected TANAMI radio galaxies
R. Angioni, E. Ros, M. Kadler +22
In the framework of the TANAMI multi-wavelength and VLBI monitoring, we study the evolution of the parsec-scale radio emission in radio galaxies in the southern hemisphere and thei…
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,…
PKS 1954-388: RadioAstron Detection on 80,000 km Baselines and Multiwavelength Observations
P. G. Edwards, Y. Y. Kovalev, R. Ojha +24
We present results from a multiwavelength study of the blazar PKS 1954-388 at radio, UV, X-ray, and gamma-ray energies. A RadioAstron observation at 1.66 GHz in June 2012 resulted…
Planetary Radio Interferometry and Doppler Experiment (PRIDE) technique: A test case of the Mars Express Phobos fly-by
Dmitry A. Duev, Sergei V. Pogrebenko, Giuseppe Cimò +33
The closest ever fly-by of the Martian moon Phobos, performed by the European Space Agency's Mars Express spacecraft, gives a unique opportunity to sharpen and test the Planetary R…
RadioAstron gravitational redshift experiment: status update
D. A. Litvinov, U. Bach, N. Bartel +25
A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit…
The TANAMI Multiwavelength Program: Dynamic SEDs of Southern Blazars
Felicia Krauß, Joern Wilms, Matthias Kadler +32
Simultaneous broadband spectral and temporal studies of blazars are an important tool for investigating active galactic nuclei (AGN) jet physics. We study the spectral evolution be…
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…
Radio and Gamma-ray Properties of Extragalactic Jets from the TANAMI Sample
M. Böck, M. Kadler, C. Müller +28
Using high-resolution radio imaging with VLBI techniques, the TANAMI program has been observing the parsec-scale radio jets of southern (declination south of -30°) gamma-ray bright…
Mobile quantum gravity sensor with unprecedented stability
Christian Freier, Matthias Hauth, Vladimir Schkolnik +6
Changes of surface gravity on Earth are of great interest in geodesy, earth sciences and natural resource exploration. They are indicative of Earth system's mass redistributions an…
The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. The Radio View
R. Schulz, A. Kreikenbohm, M. Kadler +20
Gamma-ray detected radio-loud narrow-line Seyfert 1 (g-NLS1) galaxies constitute a small but interesting sample of the gamma-ray loud AGN. The radio-loudest g-NLS1 known, PKS 2004-…
ANTARES Constrains a Blazar Origin of Two IceCube PeV Neutrino Events
ANTARES Collaboration, S. Adrián-Martínez, A. Albert +166
The source(s) of the neutrino excess reported by the IceCube Collaboration is unknown. The TANAMI Collaboration recently reported on the multiwavelength emission of six bright, var…
TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet
C. Müller, M. Kadler, R. Ojha +24
Centaurus A is the closest radio-loud active galaxy. Very Long Baseline Interferometry (VLBI) enables us to study the jet-counterjet system on milliarcsecond (mas) scales, providin…
TANAMI Blazars in the IceCube PeV Neutrino Fields
F. Krauß, M. Kadler, K. Mannheim +39
The IceCube Collaboration has announced the discovery of a neutrino flux in excess of the atmospheric background. Due to the steeply falling atmospheric background spectrum, events…
Observations and analysis of phase scintillation of spacecraft signal on the interplanetary plasma
G. Molera Calvés, S. V. Pogrebenko, G. Cimò +13
Aims. The phase scintillation of the European Space Agency's (ESA) Venus Express (VEX) spacecraft telemetry signal was observed at X-band (λ= 3.6 cm) with a number of radio telesco…
The unusual multiwavelength properties of the gamma-ray source PMNJ1603-4904
Cornelia Müller, M. Kadler, R. Ojha +27
We investigate the nature and classification of PMNJ1603-4904, a bright radio source close to the Galactic plane, which is associated with one of the brightest hard-spectrum gamma-…
Dual-frequency VLBI study of Centaurus A on sub-parsec scales
Cornelia Müller, M. Kadler, R. Ojha +16
Centaurus A is the closest active galactic nucleus. High resolution imaging using Very Long Baseline Interferometry (VLBI) enables us to study the spectral and kinematic behavior o…