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GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies.
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| GPM1 - a catalog of absolute proper motions of stars with respect to galaxies
The description of the first version of the General Compiled Catalogueof Absolute Proper Motions (GPM1) for a sample of HIPPARCOS stars,derived with respect to galaxies within the plan called Catalogue ofFaint Stars (KSZ, Deutch 1952), is presented. The principal aim of theGPM1 construction was to provide absolute proper motions of stars todetermine the rotation of the HIPPARCOS system. The GPM1 cataloguecontains 977 HIPPARCOS Input Catalogue stars with V magnitudes $5^m -11^m in 180 fields north of -25 degrees of declination. The accuracy ofthe proper motions is 8 mas/yr (milliarcseconds per year). Comparison ofproper motions of GPM1 with those of the PPM and ACRS was performed andanalyzed with respect to systematic errors caused by spurious rotationof the FK5 system. The standard errors show that the rotation may bedetermined with an accuracy better than 1 mas/yr. Catalog is onlyavailable in electronic form at the CDS via anonymous ftpcdsarc.u-strasbg.fr or ftp 130.79.128.5.
| Coude radial velocity observations at Calar Alto Observatory Zero-point and accuracy
A total of 57 8.7-A/mm-dispersion spectrograms of 20 IAU standardradial-velocity stars, obtained using the coude spectrograph on the2.2-m telescope at Calar Alto Observatory in June 1984, are analyzed todetermine the accuracy and zero-point of radial velocities measured withthis instrumentation. The results of measurements with an oscilloscopiccomparator (Andersen and Fabricius, 1982) are presented in tables. Thevalues determined include average internal mean error 0.24 km/s,plate-to-plate error for constant stars 0.58 km/s, mean zero-pointdifference from the IAU standard -0.06 + or - 0.26 km/s, and meanzero-point difference from the corrected IAU standard of Mayor andMaurice (1985) -0.08 + or - 0.16 km/s.
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