J/A+A/312/74 J/A+A/312/74 Proper motion of M 92 H -J Tucholke R -D Scholtz P Brosche Astron. Astrophys. 312 74 1996 1996A&A...312...74T Clusters, globular Proper motions astrometry catalogs Galaxy: kinematics and dynamics globular clusters: individual (M 92) reference systems stars: kinematics We present proper motions for stars in the field of the galactic globular cluster NGC6341 (M92). This study continues the series of papers from the Bonn programme of globular cluster proper motions. Plates taken with the Bonn double refractor and the Rozhen observatory 2m Ritchey-Chretien telescope with a maximal epoch difference of 94 years were used. Relative proper motions for all well-measurable stars in the 1.5degx1.5deg field covered by the plates were derived. Median proper motion errors are 0.8milliarcsec/year (mas/a) for stars brighter than about V=16.7mag. The cluster membership of UV-bright and variable stars is discussed. The proper motions are compared with the accurate relative proper motions of Rees (1992) and with the absolute proper motions from Schmidt plates referred to galaxies of Scholz et al. (1994). The latter comparison enables us to tie the proper motions of the stars and the mean proper motion of M92 to an inertial system. This calibration has an uncertainty of about 1.0mas/a. The absolute proper motions of Hipparcos stars in the field will be useful for the extragalactic calibration of the Hipparcos proper motion system. The data for 642 stars within 18.6' from the cluster centre is available via the CDS (Centre des Donnees Astronomiques Strasbourg) Data Centre.

RAh Right Ascension J2000, Epoch 1950.0 h DEdeg Declination J2000, Epoch 1950.0 deg X Distance to cluster centre (in RA) arcsec Y Distance to cluster centre (in Dec) arcsec pmRA Proper motion in RA mas/a e_pmRA Error of pmRA mas/a pmDE Proper motion in Dec mas/a e_pmDE Error of pmDE mas/a Prob Probability of Membership to M92 % Npos Number of positions used --- Bmag B Magnitude mag Ident Cross-Identifications number=1 Roman numeral - dash - number(e.g. VIII-12) or lower-case x plus number: Sandage & Walker (1966) ApJ 143, 313 =1966ApJ...143..313S B plus number: Barnard (1931) Publ. Yerkes Obs. no. 6 =1931PYerO...6....1B Bu plus number: Buonanno et al. (1983) A&AS 53, 1 =1983A&AS...53....1B R plus number: Rees (1992) AJ 103, 1573 =1992AJ....103.1573R C plus number: Cudworth (1976) AJ 81, 975 =1976AJ.....81..975C V plus number: Variable star from Sawyer Hogg (1973) Publ. DDO V. 3 no. 6 =1973PDDO....3....6S K plus number: Kadla et al. (1983) Per. Zvezdy 21, 827 =1983PZ.....21..827K N plus number: Nassau (1938) ApJ 87, 361 =1938ApJ....87..361N ZNG plus number : Zinn et al. (1972) A&A 18, 390 =1972A&A....18..390Z S plus number: Sanduleak (1989) ApJS 71, 713 =1989ApJS...71..713S HIC plus number: Hipparcos Input Catalogue, Turon et al. (1992) ESA SP-1136 =Catalogue <I/196> --- Patricia Bauer CDS 1996Feb08H.-J. Tucholke <tucholke@astro.uni-bonn.de> J_A+A_312_74.xml