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J/AJ/110/638             BVI photometry in 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
     Walker A.R.
    <Astron. J. 110, 638 (1995)>
    =1995AJ....110..638W
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ADC_Keywords: Clusters, globular ; Photometry

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 13x13arcmin 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 0.5-3Gyr population, plus some very old stars represented by
    four RR Lyrae variables.

File Summary:
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 FileName    Lrecl    Records   Explanations
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ReadMe          80          .   This file
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
   7- 12  F6.1   pix        Xpos       X coordinate
  14- 19  F6.1   pix        Ypos       Y coordinate
  21- 27  F7.3   mag        Vmag       V magnitude
  29- 35  F7.3   mag        B-V        []?=99.999 B-V color
  37- 43  F7.3   mag        V-I        []?=99.999 V-I color
  45- 50  F6.3   mag      e_Vmag       Error in Vmag
  52- 57  F6.3   mag      e_B-V        []?=9.999 Error in B-V
  59- 64  F6.3   mag      e_V-I        []?=9.999 Error in V-I
  66- 68  I3     ---      o_Vmag       Number of V observations
  70- 72  I3     ---      o_B-V        Number of B observations
  74- 76  I3     ---      o_V-I        Number of I observations
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Origin: AAS CD-ROM series, Volume 5, 1995         Lee Brotzman [ADS] 27-Sep-1995
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(End)                                                         [CDS]  10-Jan-1996