We report accurate positions in the International Celestial Reference Frame (ICRF) for 11 radio stars. Obser-vations were made using the Multi-Element Radio Linked Interferometer Network at a radio frequency of 5 GHz. The positions are estimated to be accurate at the 5 mas level. Positions were obtained directly in the ICRF by phase referencing the radio stars to ICRF quasars whose positions are estimated to be accurate at the 0.25 mas level. We use our results together with results of previous observations to obtain proper-motion estimates for these stars. The average proper-motion uncertainties are 1.1mas yr1 in cos and 1.2mas yr1 in, comparable to theHipparcos values. Key words: astrometry — radio continuum: stars — techniques: interfe...
In order to contribute to the alignment of the radio and optical reference frames, 50 stars with con...
International audienceWe present astrometric and imaging results for compact extragalactic objects o...
In 1997 the IAU adopted the International Celestial Reference Frame (ICRF) built from S/X VLBI data....
International audienceWe present astrometric results for compact extragalactic objects observed with...
International audienceA new realization of the International Celestial Reference Frame (ICRF) is pre...
Key Words astrometry, reference frames, reference systems n Abstract Advances in wide-angle astromet...
© 2016 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society.A...
We have used the Very Large Array (VLA), linked with the Pie Town Very Long Baseline Array antenna, ...
We present the results of spectroscopic observations of the optical counterparts of 47 southern radi...
We present the second realization of the International Celestial Reference Frame (ICRF2) at radio wa...
The epoch International Celestial Reference Frame (epoch ICRF) is proposed as a new concept in order...
International audienceA celestial reference frame at K-band (24 GHz) has been constructed using eigh...
The International Celestial Reference Frame (ICRF, Ma et al. 1998) is currently the best realization...
Context. The celestial reference frame is established on the basis of the absolute positions of extr...
In order to contribute to the alignment of the radio and optical reference frames, 50 stars with con...
International audienceWe present astrometric and imaging results for compact extragalactic objects o...
In 1997 the IAU adopted the International Celestial Reference Frame (ICRF) built from S/X VLBI data....
International audienceWe present astrometric results for compact extragalactic objects observed with...
International audienceA new realization of the International Celestial Reference Frame (ICRF) is pre...
Key Words astrometry, reference frames, reference systems n Abstract Advances in wide-angle astromet...
© 2016 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society.A...
We have used the Very Large Array (VLA), linked with the Pie Town Very Long Baseline Array antenna, ...
We present the results of spectroscopic observations of the optical counterparts of 47 southern radi...
We present the second realization of the International Celestial Reference Frame (ICRF2) at radio wa...
The epoch International Celestial Reference Frame (epoch ICRF) is proposed as a new concept in order...
International audienceA celestial reference frame at K-band (24 GHz) has been constructed using eigh...
The International Celestial Reference Frame (ICRF, Ma et al. 1998) is currently the best realization...
Context. The celestial reference frame is established on the basis of the absolute positions of extr...
In order to contribute to the alignment of the radio and optical reference frames, 50 stars with con...
International audienceWe present astrometric and imaging results for compact extragalactic objects o...
In 1997 the IAU adopted the International Celestial Reference Frame (ICRF) built from S/X VLBI data....