CDROM/AJ/V110/P0638      NGC 1866 (Walker 1995)
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The LMC Cluster NGC 1866. I. A Revised Photometric Sequence and a
Reconnaissance of the Surrounding Field Population
      Alistair R. Walker
      <1995, AJ, 110, 638>
      =1995AJ....110..638W
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Abstract:
  A photometric sequence consisting of 53 stars measured in the V, B, and
  I bands has been set up in the vicinity of the rich, young Large
  Magellanic Cloud cluster, NGC 1866.  Many of these stars are relatively
  isolated and are thus suitable for use as local standard stars for
  photometric studies of the cluster.  Color magnitude diagrams to a
  limit of V = 20.5 for various parts of the 13x13 arcmin field, centered
  on the cluster, show that NGC 1866 is embedded in a mix of populations
  which includes stars younger than the cluster itself, the dominant
  0.5-3 Gyr population, plus some very old stars represented by four RR
  Lyrae variables.


File Summary:
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File Name    Lrecl    Records   Explanations
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table5.dat      76       6442   Photometry for 6442 stars in a field centered
                                on NGC 1866
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Byte-by-byte Description of file: table5.dat
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   Bytes Format  Units      Label      Explanations
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   1- 5   I5     ---        Star       Star number
   6-12   F7.1   pix        X          X coordinate
  13-19   F7.1   pix        Y          Y coordinate
  20-27   F8.3   mag        V          V magnitude
  28-35   F8.3   mag        B-V        []?=99.999 B-V color
  36-43   F8.3   mag        V-I        []?=99.999 V-I color
  44-50   F7.3   mag        e_V        Error in V
  51-57   F7.3   mag        e_B-V      []?=9.999 Error in B-V
  58-64   F7.3   mag        e_V-I      []?=9.999 Error in V-I
  65-68   I4     ---        NV         Number of V observations
  69-72   I4     ---        NB         Number of B observations
  73-76   I4     ---        NI         Number of I observations
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(End)                                             Lee Brotzman [ADS] 27-Sep-1995