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II/20          UBV Photometry of O & B Stars in Vela    (Denoyelle 1977)
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The Spatial Distribution of Young Stars in Vela
     Denoyelle J.
    <Astron.  Astrophys. Suppl. Ser., 27, 343 (1977)>
    =1977A&AS...27..343D
================================================================================
ADC_Keywords: Reddening ; Photometry, UBV ; Colors ; Stars, OB

Description:
    Photoelectric UBV values, derived from observations made at the Boyden
    and  ESO observatories, are presented for  358 early-type stars in the
    Vela section of the southern Milky Way.

File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
data.dat          127      381   Data
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Byte-by-byte Description of file: data.dat
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  Bytes  Format  Units   Label    Explanations
--------------------------------------------------------------------------------
  1       I1     ---     rec      ? Record number (if several records for star)
  2-4     I3     ---     Seq      Running number
  6-11    I6     ---     HD       ? HD number
  13-20   A8     ---     CPD      ? Cape Photographic Durch. (or CD)
  21      A1     ---     n_CPD    [ *] * = CPDzone,num are from Cordoba Durch.
  22-23   I2     h       RAh      Right Ascension (1950) hours
  25-28   F4.1   min     RAm      Right Ascension (1950) minutes
  29      A1     ---     DE-      Declination (1950) sign
  30-31   I2     deg     DEd      Declination (1950) degrees
  33-34   I2     arcmin  DEm      Declination (1950) arcminutes
  36-41   F6.2   deg     GLON     Galactic longitude
  44-48   F5.2   deg     GLAT     Galactic latitude
  50-54   F5.2   mag     Vmag    *?=99.99 V magnitude
  55      A1     ---     u_Vmag   [ ()] Uncertainty flag for V
  57-61   F5.2   mag     B-V     *?=99.99 (B-V) color index
  62      A1     ---     u_B-V    [ (] Uncertainty flag for B-V
  64-68   F5.2   mag     U-B     *?=99.99 (U-B) color index
  69      A1     ---     u_U-B    [ (] Uncertainty flag for U-B
  70-78   A9     ---     Sp       MK or HD spectral classification
  79      I1     ---     ref      [1,8]? Number of the source for MK Dp.
  81      A1     ---     Emission [ E] E = Halpha emission noted on red plates
  82-85   A4     ---     Sp2      Spectral type obtained from Q method
  87-91   F5.2   mag     Q       *Q parameter
  94-97   F4.2   mag     E(B-V)   (B-V) colour excess
  100-103 F4.2   mag     A(V)    *A(V) parameter
  107-110 F4.1   mag     m-M      Distance modulus
  112-116 I5     pc      R        Distance of the star
  119-122 I4     pc      Z       *Distance from the galactic plane
  125-126 I2     ---     Nobs     Number of observations
  127     A1     ---     rem      [ *] * = Comment exists for this star
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Note on Vmag, B-V, and U-B:
   99.99 indicates that the datum is missing.

Note on Q:
  Q = (U-B) - 0.72 (B-V)

Note on A(V):
  A(V) = 3 x E(B-V)

Note on Z:
  Z = R*sin(GLAT)
--------------------------------------------------------------------------------

References:
  Denoyelle J. (1977) Astron. Astrophys. Suppl. Ser. 27, 343.
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(End)                                  Julie Anne Watko [SSDOO/ADC]  24-MAY-1996