Goddard VLBI astrometric catalogues

Goddard VLBI astrometric catalogues

ICRF2 catalogue of compact radio sources. This catalogue is currently the most complete. It includes 3414 sources sufficiently observed with astrometric and geodetic VLBI from August 1979 to March 2009. It has been adopted by the IAU as the fundamental realization of the ICRS effective 1 January 2010.
3414 objects.

2008b catalogue of compact radio sources. This catalogue includes all sources observed with astro/geo VLBI from 1980.04.11 through 2008.06.01. Also 23849 maps of 4160 radio sources are available from here.
3955 objects.

2008a catalogue of compact radio sources. It includes all sources observed with astro/geo VLBI from 1980.04.11 through 2008.02.01. Also 23774 maps of 4169 radio sources are available from here.
3922 objects.

2007c_astro catalogue of compact radio sources. This catalogue includes all sources observed with astro/geo VLBI from 1979.08.03 through 2007.08.27. Also maps of 4168 radio sources are available from here.
3913 objects.

2007b_astro catalogue of compact radio sources. It includes all sources observed with astro/geo VLBI from 1979.08.03 through 2007.07.01. Also maps of 4132 radio sources are available from here.
3689 objects.

2007a_astro catalogue of compact radio sources. It includes all sources observed with astro/geo VLBI from 1979.08.03 through 2006.07.21.
3649 objects.

2006a_astro catalogue of compact radio sources. This catalogue includes all sources observed with astro/geo VLBI from 1979.08.03 through 2006.06.22. Also maps of 1856 radio sources are available from here.
3563 objects.

2005f_astro catalogue of compact radio sources. It includes all sources observed with astro/geo VLBI from 1979.08.03 through 2005.12.01. Maps of 1509 radio sources are available as well from here.
3481 objects.

VCS6 catalogue. The VCS6 catalogue contains positions of 264 sources observed 2 sessions of the VLBI Calibrator Survey, including positions of some sources which have never been observed before July 2005 in geodetic/astrometric mode.
Reference: L. Petrov, Y. Kovalev, E. Fomalont, D. Gordon, "The fifth VLBA Calibrator Survey - VCS6", 2008, Astronomical Journal, in press. Preporint http://arXiv.org/abs/0801.3895 PDF-file.
More information is available here.
264 objects.

VCS5 catalogue. The VCS5 catalogue contains positions of 590 sources observed 3 sessions of the VLBI Calibrator Survey, including positions of ~500 sources which have never been observed before July 2005 in geodetic/astrometric mode. The survey include all sources with declination > -30^o with correlated flux density at baselines about 1000 km 200 mJy or brighter which have never been observed before with VLBI.
Reference: Y. Kovalev, L. Petrov, E. Fomalont, D. Gordon, "The fifth VLBA Calibrator Survey - VCS5", 2007, Astronomical Journal 2007, Vol. 133, pp. 1236-1242. Preprint: astro-ph/0607524 Full text (PS + gzip, 134Kb ) PDF-file.
More information is available here.
590 objects.

VCS4 catalogue. The VCS4 catalogue contains positions of 292 sources observed 3 sessions of the VLBI Calibrator Survey, including positions of 262 sources which have never been observed before July 2005 in geodetic/astrometric mode. The survey fills the regions which were not completely covered by previous VCS1, VCS2 and VCS3 surveys.
Reference: L. Petrov, Y. Kovalev, E. Fomalont, D. Gordon, "The fourth VLBA Calibrator Survey - VCS4", Astronomical Journal, vol. 131, 1872-1879, 2006. astro-ph/0508506
More information is available here.
292 objects.

VCS3 catalogue. The VCS3 catalogue contains positions of new 360 sources observed 3 sessions of the VLBI Calibrator Survey and never observed before April 2004 in geodetic/astrometric mode. The survey fills the regions which were not completely covered by previous VCS1 and VCS2 surveys.
Reference: L. Petrov, Y. Kovalev, E. Fomalont, D. Gordon, "The third VLBA Calibrator Survey - VCS3", Astronomical Journal, vol. 129, p. 1163--1170, 2005. astro-ph/0409698
More information is available here.
360 objects.

VCS2 catalogue. The VCS2 catalogue contains positions of new 276 sources observed 2 sessions of the VLBI Calibrator Survey and never observed January 2002 in geodetic/astrometric mode. The survey fills the regions which were not completely covered by previous VCS1 survey. The VCS2 includes calibrators sources near the galactic plane, -45 < delta < -30 and VLA calibrators.
Reference: E. Fomalont, L. Petrov, D.S. McMillan, D. Gordon, C. Ma, "The second VLBA Calibrator Survey - VCS2", Astronomical Journal, 126 (N5), p. 2562-2566, 2003.
More information is available here.
1332 objects.

VCS1 catalogue. The VCS1 catalogue contains positions of new 1332 sources observed 10 sessions of the VLBI Calibrator Survey and never observed December 1999 in geodetic/astrometric mode. Boundary conditions of coordinate were chosen so that the unweighted net rotation of the positions of 212 ICRF defining sources with respect to the of these sources in the ICRF catalogue is zero. This of boundary conditions secured that the coordinates in the VCS1 are in the system of the ICRF catalogue. The set estimated parameters in the solution for VCS was made as as possible to the choice made in construction of the ICRF catalogue. Therefore, systematic errors of the VCS1 catalogue are deemed to be similar to the systematic errors of the ICRF and ICRF Extension 1 catalogues.
Reference: A.J. Beasley, D. Gordon, A.B. Peck, L. Petrov, D.S. MacMillan, E.B. Fomalont, C. Ma, "The VLBA Calibrator Survey - VCS1", Asrophys. J., Supp., vol. 141, p.13-21, 2002.
More information is available here.
276 objects.

Source catalogue 2004d.sou Includes all astrometric/geodetic sessions, except VCS experiments. Positions were estimated as global parameters. Refer to the format description for more details.
More information is available here.
653 objects.

Source catalogue 2004d_lso.sou Includes all astrometric/geodetic sessions, except VCS experiments. Positions were estimated for each 24 hour experiment independently. Contains sources which were not included in the 2004a.sou . These are sources with short observing history. Refer to the format description for more details.
More information is available here.
181 objects.

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This web page was prepared by Leonid Petrov ()
Last update: 2008.02.29_23:37:00