Absolute proper motions for the calibration of the HIPPARCOS proper motion system

Details Absolute proper motions for the calibration of the HIPPARCOS proper motion system Absolute proper motions for the calibration of the HIPPARCOS proper motion system

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..124..157g&link_type=abstract

A & A Supplement series, Vol. 124, July 1997, 157-161.

Astronomy and Astrophysics

Astronomy

14

Astrometry, Reference System, Stars: Kinematics

Scientific paper

Absolute proper motions of 48 Hipparcos stars in nine fields 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 fields for the link. For six fields the extragalactic calibration was achieved using the bright quasar in the centre of the field. In addition, data of three fields of globular clusters were included. For these fields 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 field plates from the ESO Schmidt telescope in combination with measurements 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. Table 2 is also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html}

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