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ICRF-Ext.1: First Maintenance and Extension of the ICRF

The ICRF maintenance and extension catalogue ICRF-Ext.1 contains updated coordinates of the 608 ICRF extragalactic radio sources and of 59 new sources. The data added to the ICRF spanned December 1994 through April 1999 from both geodetic and astrometric observing programs.

ContentsEquatorial coordinates of 667 extragalactic radio sources in J2000.0 observed with VLBI.
Accuracy

Uncertainties are given in the file.

R.A. [s]0.000017 - 0.053679
Dec. ["]0.00026 - 0.52054
Public accesshttp://hpiers.obspm.fr/icrs-pc/newwww/index.php
FormatFor format description see contents of the data file.
Documentationhttp://hpiers.obspm.fr/icrs-pc/newwww/icrf/index.php
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