The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry
| hal.structure.identifier | Jet Propulsion Laboratory [JPL] | |
| dc.contributor.author | LANYI, G. E. | |
| hal.structure.identifier | US Naval Observatory [US NAVAL OBSERVATORY] | |
| dc.contributor.author | BOBOLTZ, D. A. | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Université Sciences et Technologies - Bordeaux 1 [UB] | |
| dc.contributor.author | CHARLOT, P. | |
| hal.structure.identifier | US Naval Observatory [US NAVAL OBSERVATORY] | |
| dc.contributor.author | FEY, A. L. | |
| hal.structure.identifier | National Radio Astronomy Observatory [NRAO] | |
| dc.contributor.author | FOMALONT, E. B. | |
| dc.contributor.author | GELDZAHLER, B. J. | |
| hal.structure.identifier | NASA Goddard Space Flight Center [GSFC] | |
| dc.contributor.author | GORDON, D. | |
| hal.structure.identifier | Jet Propulsion Laboratory [JPL] | |
| dc.contributor.author | JACOBS, C. S. | |
| dc.contributor.author | MA, C. | |
| hal.structure.identifier | Jet Propulsion Laboratory [JPL] | |
| dc.contributor.author | NAUDET, C. J. | |
| dc.contributor.author | ROMNEY, J. D. | |
| hal.structure.identifier | Jet Propulsion Laboratory [JPL] | |
| dc.contributor.author | SOVERS, O. J. | |
| hal.structure.identifier | Jet Propulsion Laboratory [JPL] | |
| dc.contributor.author | ZHANG, L. D. | |
| dc.date.issued | 2010-05 | |
| dc.identifier.issn | 0004-6256 | |
| dc.description.abstractEn | 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. | |
| dc.language.iso | en | |
| dc.publisher | American Astronomical Society | |
| dc.subject.en | astrometry | |
| dc.subject.en | catalogs | |
| dc.subject.en | quasars: general | |
| dc.subject.en | radio continuum: galaxies | |
| dc.subject.en | reference systems | |
| dc.subject.en | techniques: interferometric | |
| dc.title.en | The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/0004-6256/139/5/1695 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM] | |
| bordeaux.journal | The Astronomical Journal | |
| bordeaux.page | 1695-1712 | |
| bordeaux.volume | 139 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00466226 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00466226v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astronomical%20Journal&rft.date=2010-05&rft.volume=139&rft.spage=1695-1712&rft.epage=1695-1712&rft.eissn=0004-6256&rft.issn=0004-6256&rft.au=LANYI,%20G.%20E.&BOBOLTZ,%20D.%20A.&CHARLOT,%20P.&FEY,%20A.%20L.&FOMALONT,%20E.%20B.&rft.genre=article |
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