JACOBS, C. S.; LANYI, G. E.; NAUDET, C. J.; SOVERS, O. J.; ZHANG, L. D.; CHARLOT, P.; FOMALONT, E. B.; GORDON, D.; MA, C.; VLBI COLLABORATION, Kq

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

JACOBS, C. S.
Jet Propulsion Laboratory [JPL]

LANYI, G. E.
Jet Propulsion Laboratory [JPL]

NAUDET, C. J.
Jet Propulsion Laboratory [JPL]

Langue

Communication dans un congrès

Ce document a été publié dans

International VLBI Service for Geodesy and Astrometry 2006 General Meeting Proceedings, Concepción, Chili, 9-11 January 2006, Eds. D. Behrend and K. D. Baver, NASA/CP-2006-214140,, International VLBI Service for Geodesy and Astrometry 2006 General Meeting Proceedings, Concepción, Chili, 9-11 January 2006, Eds. D. Behrend and K. D. Baver, NASA/CP-2006-214140,, 2006, Concepción. 2006p. 320

Résumé en anglais

A celestial reference frame at K-band (24 GHz) has been constructed using eight 24-hour VLBA sessions which covered the full 24 hours of right ascension and declinations down to -40 deg. The resulting catalog contains 259 sources with median formal position uncertainties of 100 micro-arcsec in RA cos(dec) and 200 microarcsec in declination. In order to constrain the long arcs of the K-band catalog to those obtained with the S/X-band ICRF, four K-band high quality source positions well-separated in the sky were set to the S/X-band positions. After this registration, comparison of the K-band frame to an S/X-band ICRF-like frame shows agreement of 200 micro-arcsec in RA cos(dec) and 300 micro-arcsec in declination. The motivations for extending the ICRF to frequencies above 8 GHz are to use more compact sources less susceptible to structure changes in order to construct a more stable frame, to provide calibrators for phase referencing, and to support spacecraft navigation at higher frequencies.< Réduire

Origine

Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804