Absolute proper motions for the calibration of the Hipparcos proper motion system
| Autor: | M. Geffert, M. Hiesgen, J. Schmoll, A. R. Klemola |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Physics
Proper motion Astrophysics::Instrumentation and Methods for Astrophysics Physics::Optics General Physics and Astronomy Astronomy Quasar Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Astrometry Schmidt camera Astrograph Galaxy law.invention Stars law Globular cluster Astrophysics::Solar and Stellar Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomy and Astrophysics Supplement Series. 124:157-161 |
| ISSN: | 1286-4846 0365-0138 |
| DOI: | 10.1051/aas:1997186 |
| Popis: | Absolute proper motions of 48 Hipparcos stars in nine elds distributed over the northern hemisphere are presented. The proper motions have been recently used as part of the Bonn program for the extragalactic link of the Hipparcos proper motion system. We describe methods which have led to the absolute proper motions of the major part of the Bonn elds for the link. For six elds the extra- galactic calibration was achieved using the bright quasar in the centre of the eld. In addition, data of three elds of globular clusters were included. For these elds the link to an extragalactic reference system was performed by stars, whose absolute proper motions with respect to galaxies were determined on plates of the Lick astrograph. In addition, we used for the link in one eld plates from the ESO Schmidt telescope in combination with measure- ments from glass copies of the Palomar Sky Survey. The accuracy of a single proper motion is of the order of 2 to 3 mas/a for each coordinate. 1 |
| Databáze: | OpenAIRE |
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