Establishing celestial reference frames at different ranges of wavelengths",
| dc.contributor.author | MA, Chopo | |
| hal.structure.identifier | Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) [FEMTO-ST] | |
| dc.contributor.author | ANDREI, A. | |
| hal.structure.identifier | M2A 2011 | |
| dc.contributor.author | BOURDA, G. | |
| dc.contributor.author | JACOBS, C. | |
| dc.date.issued | 2011 | |
| dc.date.conference | 2011 | |
| dc.description.abstractEn | The current fundamental celestial reference frame is the second realization of the International Celestial Reference Frame (ICRF2) derived from dual frequency VLBI observations at 13/3.6 cm. The ICRF2 catalog includes ∼3000 compact radio sources, largely quasars, of which 295 defining sources establish the coordinate axes with an accuracy of ∼10 microarcseconds. More limited catalogs have been developed at 1.2 cm using the VLBA (∼300 sources) and at 3.6/0.9 cm using the Deep Space Network (∼500 sources), primarily to support spacecraft navigation. Anticipating the prospective Gaia optical catalogue, a set of ∼400 radio weak but optically bright (V ≤ 18) objects is being studied at 13/3.6 cm for the radio-optical frame tie using the high sensitivity of the EVN + VLBA. The Gaia QSO catalog currently has ∼100,000 defining objects whose morphology and variability are being tabulated. The characteristics, limitations and future development of the various wavelength catalogs will be discussed along with the anticipated radio-optical frame transfer. | |
| dc.language.iso | en | |
| dc.source.title | JENAM 2011, Saint-Pétersbourg - Russie, 4-8 Juillet 2011. | |
| dc.title.en | Establishing celestial reference frames at different ranges of wavelengths", | |
| dc.type | Communication dans un congrès | |
| 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.volume | 1 | |
| bordeaux.country | RU | |
| bordeaux.title.proceeding | JENAM 2011, Saint-Pétersbourg - Russie, 4-8 Juillet 2011. | |
| bordeaux.conference.city | Saint-Petersbourg | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00991477 | |
| hal.version | 1 | |
| hal.invited | oui | |
| hal.proceedings | oui | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00991477v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=JENAM%202011,%20Saint-P%C3%A9tersbourg%20-%20Russie,%204-8%20Juillet%202011.&rft.date=2011&rft.volume=1&rft.au=MA,%20Chopo&ANDREI,%20A.&BOURDA,%20G.&JACOBS,%20C.&rft.genre=unknown |
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