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J/PASP/110/1434     High-velocity stars radial velocities     (Stock+, 1998)
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Digital objective prism spectroscopy and astrometry: quantitative methods and
application to high-velocity stars.
     Stock J., Rose J.A., Agostinho R.J.
    <Publ. Astron. Soc. Pac. 110, 1434 (1998)>
    =1998PASP..110.1434S
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ADC_Keywords: Stars, high-velocity ; Radial velocities
Keywords: galaxy: kinematics and dynamics - stars: kinematics - astrometry -
          techniques: radial velocities

Abstract:
    We describe methods for extracting quantitative spectra and
    astrometric positions from objective prism plates. In particular, we
    have studied 7161 stars in eight fields along the south Galactic
    meridian using the 6{deg}+4{deg} objective prisms on the Curtis
    Schmidt telescope at Cerro Tololo Inter-American Observatory. In this
    paper we concentrate on techniques for deriving radial velocities and
    astrometric positions from opposed dispersion plate pairs. For our
    data the typical accuracy in radial velocity is ~8km/s. A catalog of
    108 stars with high radial velocities is presented, which is complete
    (and unbiased in either kinematics or metallicity) to a limiting B
    magnitude of 12.5 in the eight fields studied. Only two of this sample
    of 108 stars have previously reported radial velocities.

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table3.dat         70      108   Catalog of high radial velocity stars
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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-  6  A6    ---      [SRA98]   Star Number
       7  A1    ---    n_[SRA98]   Note on individual star (1)
   9- 10  I2    h        RAh       Right ascension (J2000)
  12- 13  I2    min      RAm       Right ascension (J2000)
  15- 20  F6.3  s        RAs       Right ascension (J2000)
  22- 26  F5.3  s      e_RAs       rms uncertainty on right ascension
      28  A1    ---      DE-       Declination sign (J2000)
  29- 30  I2    deg      DEd       Declination (J2000)
  32- 33  I2    arcmin   DEm       Declination (J2000)
  35- 39  F5.2  arcsec   DEs       Declination (J2000)
  41- 44  F4.2  arcsec e_DEs       rms uncertainty on declination
  46- 48  I3    mas/yr   pmRA      ? Proper motion in right ascension
  50- 53  I4    mas/yr   pmDE      ? Proper motion in declination
  55- 58  F4.1  mag      Pmag      P magnitude (B+0.22(B-V))
  60- 65  F6.1  km/s     RV        Radial velocity
  67- 70  F4.1  km/s   e_RV        rms uncertainty on RV
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Note (1): a: HD 6023; G6 III, [Fe/H]=-0.57, M_v_=1.8, from DDO photometry
              in Hartkopf & Yoss (1982AJ.....87.1679H)
          b: Star 507335 in Flynn & Freeman, 1993, Cat. <J/A+AS/9/835>;
              V_r_=118km/s, and [Fe/H]=-0.63 and M_v_=1.38 from their DDO
              photometry.
          c: LTT 728 = G268-151; previously reported radial velocities and
              [Fe/H] are V_r_=79km/s and [Fe/H]=-0.7 (Carney & Peterson,
              1988AJ.....96..378C), and V_r_=66km/s and [Fe/H]=-1.12
              (Ryan & Norris, 1991AJ....101.1835R); proper motion given as
              {mu}=228mas/yr, with {theta}=92{deg} in Ryan & Norris
              (1991AJ....101.1835R).
          d: CD - 29 471 = SB 963; identified as sdFG by Graham & Slettebak
              (1973AJ.....78..295G); uvby photometry given there.
          e: Star 512589 in Flynn & Freeman, 1993, Cat. <J/A+AS/9/835>;
              [Fe/H]=-0.77 and M_v_=0.86 from their DDO photometry.
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History: From PASP electronic version
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(End)                           James Marcout, Patricia Bauer [CDS]  04-Feb-1999