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J/A+AS/111/75             UBVRI CCD photometry of NGC 4755        (Sagar+, 1995)
A deep UBVRI CCD photometric study of the moderately young southern open
star cluster NGC 4755 = κ Crucis
      SAGAR R., CANNON R.D.
      <Astron. Astrophys. Suppl. Ser. 111, 75 (1995)>
      =1995A&AS..111...75S      (SIMBAD/NED Reference)
ADC_Keywords: Clusters, open; Photometry, CCD; Photometry, UBVRI

Keywords: stars: formation - HR diagram -
          open clusters and associations: individual: NGC 4755

Description:
   CCD observations in U, B, V, R and I passbands have been used to generate
   (U-B), (B-V) colour-colour and deep V, (B-V); V, (U-B) and V, (V-I)
   colour-magnitude diagrams for the young open cluster NGC 4755. The sample
   consists of 813 stars reaching down to V about 20mag.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table4            72      813   UBVRI photometry


Byte-by-byte Description of file: table4

   Bytes Format  Units   Label    Explanations

       1  I1     ---     Region   [1-2] Region number (1)
   3-  5  I3     ---     No       star number
   7- 12  F6.2   pix     X        X coordinate
  14- 19  F6.2   pix     Y        Y coordinate
  21- 25  F5.2   mag     Vmag     V magnitude
  27- 31  F5.2   mag     U-B      []? U-B colour
  33- 36  F4.2   mag     B-V      []? B-V colour
  38- 41  F4.2   mag     V-R      []? V-R colour
  43- 46  F4.2   mag     V-I      []? V-I colour
      48  I1     ---     o_Umag   []? Number of observations in U
      50  I1     ---     o_Bmag   []? Number of observations in B
      52  I1     ---     o_Vmag   Number of observations in V
      54  I1     ---     o_Rmag   []? Number of observations in R
      56  I1     ---     o_Imag   []? Number of observations in I
  58- 71  A14    ---   OtherName  Cross identification of stars. (2)

Note (1): The center of Region 1 is located ∼3.2 arcmin south-west while
    that of Region 2 ∼3.5 arcmin north-east to the cluster center marked
    by Dachs & Kaiser (1984).
Note (2): Stars observed by Arp & van Sant (1958) and Dachs & Kaiser (1984)
    in the photoelectric and photographic system have been prefixed with AV
    and DK respectively. The candidates for pre-main sequence stars are
    identified as PMS in the last column.


References:
   Arp H.C., van Sant C.T., 1958, AJ, 63, 341
   Dachs J., Kaiser D., 1984, A&AS, 58, 411
(End)                                           Patricia Bauer [CDS] 06-Jan-1995