68 citations · 68 across the 3 of their papers we have counts for
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Relativistic Jets in The Radio Reference Frame Image Database I: Apparent Speeds from the First Five Years of Data
B. G. Piner, M. Mahmud, A. L. Fey +1
(Abridged) We present the results of an analysis of relativistic jet apparent speeds from VLBI images in the Radio Reference Frame Image Database (RRFID). The images are snapshot V…
Densification of the International Celestial Reference Frame: Results of EVN Observations
P. Charlot, A. L. Fey, C. S. Jacobs +3
The current realization of the International Celestial Reference Frame (ICRF) comprises a total of 717 extragalactic radio sources distributed over the entire sky. An observing pro…
Current Results from the RRFID Kinematic Survey: Apparent Speeds from the First Five Years of Data
B. G. Piner, A. L. Fey, M. Mahmud
We present current results from our ongoing project to study the parsec-scale relativistic jet kinematics of sources in the U.S. Naval Observatory's Radio Reference Frame Image Dat…
RORF - a Radio Optical Reference Frame
N. Zacharias, A. L. Fey, J. L. Russell +1
The radio observations are based on dual frequency Mark--III VLBI data from 1979 until the end of 1993. Currently 436 sources define the celestial inertial frame. A comparison to t…