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J/A+A/312/74        Proper motion of M 92 (Tucholke+, 1996)
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Proper motion study of the globular cluster M92.
     Tucholke H.-J., Scholtz R.-D., Brosche P.
    <Astron. Astrophys. 312, 74 (1996)>
    =1996A&A...312...74T      (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, globular ; Proper motions
Keywords: globular clusters: M92 - astrometry - stars: kinematics -
          reference systems - catalogs - Galaxy: kinematics and dynamics

Description:
    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.

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table3.dat         87      642   Proper motion of M 92
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Byte-by-byte Description of file: table3.dat
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   Bytes Format Units   Label     Explanations
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   1- 10  F10.7 h       RAh       Right Ascension J2000, Epoch 1950.0
  12- 20  F9.6  deg     DEdeg     Declination J2000, Epoch 1950.0
  22- 28  F7.1  arcsec  X         Distance to cluster centre (in RA)
  30- 36  F7.1  arcsec  Y         Distance to cluster centre (in Dec)
  38- 42  F5.1  mas/a   pmRA      Proper motion in RA
  44- 46  F3.1  mas/a e_pmRA      Error of pmRA
  48- 53  F6.1  mas/a   pmDE      Proper motion in Dec
  55- 57  F3.1  mas/a e_pmDE      Error of pmDE
  59- 60  I2    %       Prob      Probability of Membership to M92
  62- 63  I2    ---     Npos      Number of positions used
  65- 69  F5.2  mag     Bmag      []?=99.99 B Magnitude
  71- 87  A17   ---     Ident     Cross-Identifications (1)
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Note (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>
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Courtesy: H.-J. Tucholke <tucholke@astro.uni-bonn.de>
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(End)                                         Patricia Bauer [CDS]   08-Feb-1996