CDROM/AJ/V106/P0637     Speckle Observations of Binaries (Mason+ 1993)
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ICCD Speckle Observations of Binary Stars. IX.  A Duplicity Survey of the
Pleiades, Praesepe, and IC 4665 Clusters
      Brian D. Mason, William I. Hartkopf, Harold A. McAlister, & James R.
      Sowell
      <1993, AJ, 106, 637>
      =1993AJ....106..637M
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Abstract:
  Multiplicity of stars within clusters is a well-studied phenomenon.
  However, recent survey work done on the Hyades by Mason et al. [AJ, 105,
  220 (1993)] would seem to indicate that even in the most often studied
  clusters, there may be binaries yet undiscovered.  In order to expand
  the sample of cluster binaries with potentially short-period visual
  orbits, a speckle survey of 45 Pleiades, 54 Praesepe, and 22 IC 4665
  bright stars (V < 10) for possible multiplicity was conducted at the
  KPNO 4 m Mayall telescope between 1987 October and 1991 November.  Of
  these, three new binaries have been discovered: one in the Pleiades
  where the new component may be spectroscopic, another in Praesepe which
  has been confirmed from examinations of archival observations and also
  has been resolved by occultation, and the third in IC 4665.  Continued
  study of these new binary stars could further refine the cluster
  distance moduli as well as the cluster mass-luminosity relations.


File Summary:
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File Name    Lrecl    Records    Explanations
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table3.dat      32        108    Negative results
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Comments for file: table3.dat
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Table 3 contains 108 stars which exhibited no evidence of duplicity in
this survey.  Column one gives the star name. In this, H refers to
Pleiades stars from the list of Hertzsprung (1923, Effective
Wavelengths of Stars in the Pleiades, Mem.  Acad. R. Sci. Lettres de
Danemark, Copenhagen), KW and VL are stars in Praesepe from the lists
of Klein-Wassink (1927, Groningen Publ. No. 41) and Vanderlinden
(1933, Etude de l amas de Praesepe, edited by J.U. Duculot, Gembloux,
Belgium), and K refers to stars in IC 4665 from the list of Kopff
(1947, Astr. Nach., 274, 69).  The second column lists the HD number,
and the epoch of observation is given in the third column.
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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     ---      Name     Star name (see comments)
   7- 8   2X     ---      ---      Blank
   9-14   A6     ---      HD       Henry Draper (HD) number
  15-23   F9.4   yr       Epoch1   Epoch of observation (1900.0+)
  24-32   F9.4   yr       Epoch2   []? Epoch of observation (1900.0+)
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(End)                                             Lee Brotzman [ADS] 15-Mar-1995