NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-19 T01:29:26 PDT
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For refcode 1998AJ....116..516M:
Retrieve 608 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1998AJ....116..516M THE INTERNATIONAL CELESTIAL REFERENCE FRAME AS REALIZED BY VERY LONG BASELINE INTERFEROMETRY C. MA NASA Goddard Space Flight Center, Code 926, Greenbelt, MD 20771 E. F. ARIAS Observatorio Astronomico de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina; and Observatorio Naval Buenos Aires T. M. EUBANKS AND A. L. FEY US Naval Observatory, Code EO, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 A.-M. GONTIER Observatoire de Paris, CNRS, URA 1125, 61 Avenue de l'Observatoire, F-75014 Paris, France C. S. JACOBS AND O. J. SOVERS Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099 B. A. ARCHINAL US Naval Observatory, Code EO, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 AND P. CHARLOT Observatoire de Paris, CNRS, URA 1125, 61 Avenue de l'Observatoire, F-75014 Paris, France Received 1997 December 1; revised 1998 March 19 ABSTRACT A quasi-inertial reference frame is defined based on the radio positions of 212 extragalactic sources distributed over the entire sky. The positional accuracy of these sources is better than about 1 mas in both coordinates. The radio positions are based upon a general solution for all applicable dual-frequency 2.3 and 8.4 GHz Mark III very long baseline interferometry data available through the middle of 1995, consisting of 1.6 million pairs of group delay and phase delay rate observations. Positions and details are also given for an additional 396 objects that either need further observation or are currently unsuitable for the definition of a high-accuracy reference frame. The final orientation of the frame axes has been obtained by a rotation of the positions into the system of the International Celestial Reference System and is consistent with the FK5 J2000.0 optical system, within the limits of the link accuracy. The resulting International Celestial Reference Frame has been adopted by the International Astronomical Union as the fundamental celestial reference frame, replacing the FK5 optical frame as of 1998 January 1. Key words: astrometry-catalogs-quasars: general-radio continuum-reference systems-techniques: interferometric
Retrieve 608 NED objects in this reference.
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