38 citations · 44 across the 5 of their papers we have counts for
10 papers
Measurement of core-shifts with astrometric multi-frequency calibration
Maria J. Rioja, Richard Dodson, Richard W. Porcas +2
VLBI is unique, among the space geodetic techniques, in its contribution to defining and maintaining the International Celestial Reference Frame, providing precise measurements of…
A VLBI Study of the Gravitational Lens JVAS B0218+357
R. Mittal, R. Porcas, O. Wucknitz +1
We present the results of phase-referenced VLBA+Effelsberg observations at five frequencies of the gravitational lens B0218+357 to establish the precise registration of the A and B…
Compact Structure in FIRST Survey Sources
R. W. Porcas, W. Alef, T. Ghosh +2
We present preliminary results from a statistical survey of compact structure in faint radio sources. Around 1000 sources from the VLA FIRST survey (flux densities larger than 1 mJ…
Global 8.4-GHz VLBI observations of JVAS B0218+357
A. D. Biggs, O. Wucknitz, R. W. Porcas +4
In this paper we present new observations of the gravitational lens system JVAS B0218+357 made with a global VLBI network at a frequency of 8.4 GHz. Our maps have an rms noise of 3…
VLBI observations in Cluster-Cluster mode at 1.6 GHz
M. J. Rioja, R. W. Porcas, J. -F. Desmurs +3
We describe, and present preliminary results from the analysis of 1.6 GHz VLBI observations, made in Cluster-Cluster mode between subgroups of antennas from the WSRT, VLA and MERLI…
The core-jet structure of the JVAS gravitational lens B1030+074
E. Xanthopoulos, M. Norbury, A. Karidis +6
We present results from VLBA+Effelsberg 1.7 GHz, VLBA 8.4 GHz and VLBA 15 GHz observations of the JVAS gravitational lens system B1030+074. The VLBA+Effelsberg 1.7 GHz data with 3…