NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-27 T05:52:50 PDT
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For refcode 1994A&AS..104..503C:
Retrieve 29 NED objects in this reference.
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
1994A&AS..104..503C Optical astrometry of Benchmark radio sources. II. Positions of 29 compact extragalactic radio sources with respect to the International Reference Stars catalogue E. Costa and P. Loyola Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile Received 24 August; accepted 26 October, 1993 Abstract. - Optical positions, relative to the newly available International Reference Stars catalogue (IRS) have been obtained for the optical counterparts of 29 compact extragalactic radio sources south of {delta} ~ +12^deg^; Most of these sources have been selected by IAU Commission 24 to be used as Benchmark objects for the establishment of a high-precision radio/optical reference frame. Precision levels better than 0.2" in both coordinates were achieved. Comparisons with independent optical surveys and with VLBI radio positions available for these sources are presented. The use of the IRS catalogue is strongly supported. Key words: astrometry - reference systems - radio continuum: galaxies
Retrieve 29 NED objects in this reference.
Please click here for ADS abstract

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