VII/21              Catalogue of Reflection Nebulae  (Van den Bergh, 1966)

           [Custom version for Cartes du Ciel-Sky Charts and Deepsky 2000}
Modifications by Patrick Chevalley (pch@crosswinds.net) Geneva, Switzerland
Documentation modified by Raymond Bruton (pam99999@swbell.net) Ft.Worth,Tx USA
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Modified for Cartes du Ciel by Patrick Chevalley, May 18 2000 
Aproved for use by Deepsky 2000, May 25 2000
Added nebula and star J2000 equatorial coordinates.
File vdb.dat :
Bytes    Explanation
--------------------------------------------------------------------------------
 85- 98  Nebula equatorial coordinates from the original galactic coordinates.
           [Very Crude positions]
 85- 86  R.A. (2000.0)     hours
 88- 89  R.A. (2000.0)     minutes
 92- 94  Dec. (2000.0)     degrees  (sign in byte 92)
 96- 97  Dec. (2000.0)     arc-minutes

101-122  Star equatorial coordinates from Sky Catalogue 2000 Master Star Cat-
alogue version 2, Aande et. al. (1998), <V/102> CDS, <5102> ADC (NASA).
[These positions were extracted by use of Durchmusterung identifiers]
                [Precision Positions of Illuminating Stars]
101-102  R.A. (2000.0)     hours
104-105  R.A. (2000.0)     minutes
107-110  R.A. (2000.0)     seconds to one tenth
113-115  Dec. (2000.0)     degrees  (sign in byte 113)
117-118  Dec. (2000.0)     arc minutes
120-121  Dec. (2000.0)     arc seconds
-------------------------------------------------------------------------------
Other field are the same as the original catalog.dat
Patrick Chevalley, Geneva;      Raymond Bruton, Fort Worth    May 26 2000
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Catalogue of Reflection Nebulae
     Van den Bergh S.
    <Astron. J. 71, 990 (1966)>
    =1966AJ.....71..990V
================================================================================
ADC_Keywords: Nebulae

Description:
    A catalogue is given of all BD and CD stars north of -33deg which are
    surrounded by reflection nebulosity visible on both the blue and red
    prints of the Palomar Sky Survey. The nearer reflection nebulae lie
    predominantly along Gould's Belt, whereas the more distant ones are
    concentrated to the galactic plane. The data outline 13 associations
    of reflection nebulae, some of which coincide with known OB or T
    associations. Attention is drawn to the fact that most reflection
    nebulae are illuminated by the integrated light of the Milky Way. The
    integrated radiation will be more intense above and below the galactic
    plane then in the galactic plane where the nuclear bulge of the Galaxy
    and most of the disk are obscured by interstellar absorption.

File Summary:
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 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
catalog.dat     83        158    The catalogue (Table I of publication)
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Byte-by-byte Description of file: catalog.dat
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   Bytes Format  Units  Label     Explanations
--------------------------------------------------------------------------------
   2-  4  I3     ---    VdB       [1-158]+ van den Bergh catalog number (1)
       5  A1     ---    RemFlag   '*' if remark is given in the publication
   6- 15  A10    ---    DM        Durchmusterung (BD, CD or CP) designation
  17- 22  I6     ---    HD        [1/359083]? Henry Draper Catalog (HD) number
  23- 24  A2     ---    HD2       HD number suffix if second designation given
  25- 29  F5.1   deg    GLON      Galactic longitude
  30- 34  F5.1   deg    GLAT      Galactic latitude
  36- 44  A9     ---    SpType    Spectral type
  45- 49  F5.2   mag    Vmag      ? V magnitude
      50  A1     ---    n_Vmag    [V] 'V' if variable magnitude
  51- 55  A5     ---    Type      Type of nebula, see Note (2)
  58- 61  A4     ---    SurfBr    Surface brightness on the blue PSS prints (3)
  62- 65  A4     ---    Color     Coded reference to colors, see Note (4)
  66- 70  A5     ---    Absorb    Absorption in field of nebula (5)
  71- 75  F5.1   arcmin BRadMax   Maximum radii observed on blue PSS prints
      76  A1     ---    u_BRadMax Uncertainty flag (:) on BRadMax
  77- 81  F5.1   arcmin RRadMax   Maximum radii observed on red PSS prints
      82  A1     ---    u_RRadMax Uncertainty flag (:) on BRadMax
--------------------------------------------------------------------------------
Note (1): a 159th reflection nebula corresponding to HD 224403
   (GLON=116.6, GLAT=-00.22) is introduced by R. Racine in his study
   of stars in Reflection Nebulae in (1968AJ.....73..233R)
Note (2): Types given are I, II, I-II, II P, II, or P.
   P is peculiar, and Type I and II are defined as follows:
   Type I: nebula in which the illuminating star is embedded in the nebulosity;
   Type II: star located outside the illuminated nebulosity.
Note (3): Brightness is coded as:
     'VBR'=very bright;   'BR'=bright;     'M'=moderate;
       'F'=faint;         'VF'=very faint; ':'=uncertain.
Note (4): Color classes are coded as:
     'VB'=very blue;      'B'=blue;    'MB'=moderately blue;  'I'=intermediate
     'MR'=moderately red; 'R'=red;     'VR'=very red;         ':'=uncertain.
Note (5): Absorption is noted as:
     'STR'=strong;  'MOD'=moderate;  'WK'=weak;  'ABS'=absent
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Historical Notes:
  * NASA/ADC: The machine-readable version of the van den Bergh Reflection
    Nebulae Catalogue was received from the University of Maryland. The
    original card deck was in the 026 punch and this was converted to a
    029 deck. Two keypunch errors were corrected in the 029 version:
     #34 - the spectral type was changed from 09.5V to O9.5V (zero to oh)
    #112 - the brightness was changed from ";"to "F"
  * July 1979: documentation of the electronic version prepared by
    Theresa A. Nagy (Document R-SAW-7/79-04 at NASA-GSFC, Greenbelt)
  * Prepared in directory       /nonstell/nebulae/reflect    of CD-ROM
    "Selected Astronomical Catalogs Volume 1" edited by the
    Astronomical Data Center, NASA, 1992.
  * 23-Aug-1995: Inserted missing decimal points in radius columns,
    and added this standardized documentation file (at CDS)
================================================================================
(End)                                     Francois Ochsenbein [CDS]  23-Aug-1995