3 papers
astro-ph2004
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…
astro-ph2004
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…
astro-ph1994
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…