120 citations · 967 across the 45 of their papers we have counts for
45 papers
Gravitational redshift test of EEP with RA from near Earth to the distance of the Moon
N. V. Nunes, N. Bartel, A. Belonenko +8
The Einstein Equivalence Principle (EEP) is a cornerstone of general relativity and predicts the existence of gravitational redshift. We report on new results of measuring this shi…
Technical constraints on interstellar interferometry and spatially resolving the pulsar magnetosphere
M. V. Popov, N. Bartel, A. S. Andrianov +6
Scintillation of pulsar radio signals caused by the interstellar medium can in principle be used for interstellar interferometry. Changes of the dynamic spectra as a function of pu…
Electron density variations in the interstellar medium and the average frequency profile of a scintle from pulsar scintillation spectra
N. Bartel, M. S. Burgin, E. N. Fadeev +4
We observed the scintillation pattern of nine bright pulsars at 324 MHz and three at 1.68 GHz and analyzed the wavenumber spectrum which is related to electron density variations o…
The Bright Supernova 1996cr in the Circinus Galaxy Imaged with VLBI: Shell Structure with Complex Evolution
Michael F. Bietenholz, Norbert Bartel, Vikram V. Dwarkadas +5
We present broadband radio flux-density measurements supernova (SN) 1996cr, made with MeerKAT, ATCA and ALMA, and images made from very long baseline interferometry (VLBI) observat…
The antenna phase center motion effect in high-accuracy spacecraft tracking experiments
D. A. Litvinov, N. V. Nunes, A. I. Filetkin +5
We present an improved model for the antenna phase center motion effect for high-gain mechanically steerable ground-based and spacecraft-mounted antennas that takes into account no…
Ionospheric effects in VLBI measured with space-ground interferometer RadioAstron
M. V. Popov, N. Bartel, M. S. Burgin +2
We report on slow phase variations of the response of the space-ground radio interferometer RadioAstron during observations of pulsar B0329+54. The phase variations are due to the…