The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry

Details The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aj....139.1695l&link_type=abstract

The Astronomical Journal, Volume 139, Issue 5, pp. 1695-1712 (2010).

Astronomy and Astrophysics

Astronomy

9

Astrometry, Catalogs, Quasars: General, Radio Continuum: Galaxies, Reference Systems, Techniques: Interferometric

Scientific paper

We present astrometric results for compact extragalactic objects observed with the Very Long Baseline Array at radio frequencies of 24 and 43 GHz. Data were obtained from ten 24 hr observing sessions made over a five-year period. These observations were motivated by the need to extend the International Celestial Reference Frame (ICRF) to higher radio frequencies to enable improved deep space navigation after 2016 and to improve state-of-the-art astrometry. Source coordinates for 268 sources were estimated at 24 GHz and for 131 sources at 43 GHz. The median formal uncertainties of right ascension and declination at 24 GHz are 0.08 and 0.15 mas, respectively. Median formal uncertainties at 43 GHz are 0.20 and 0.35 mas, respectively. Weighted root-mean-square differences between the 24 and 43 GHz positions and astrometric positions based on simultaneous 2.3 and 8.4 GHz Very Long Baseline Interferometry observations, such as the ICRF, are less than about 0.3 mas in both coordinates. With observations over five years we have achieved a precision at 24 GHz approaching that of the ICRF but unaccounted systematic errors limit the overall accuracy of the catalogs.

Affiliated with

Also associated with

No associations

Rating

The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1892008