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/catalogs/7/7068A/

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VII/68A         Dark Nebulae and Globules for l=240-360deg  (Feitzinger+ 1984)
================================================================================
Catalogue of Dark Nebulae and Globules for Galactic Longitudes 240
to 360 degrees.
     Feitzinger J.V., Stuewe J.A.
    <Astron. Astrophys. Suppl. Ser. 58, 365 (1984)>
    <Astron. Astrophys. Suppl. Ser. 63, 203 (1986)>  (Erratum)
    =1984A&AS...58..365F        (SIMBAD/NED BibCode)
================================================================================
ADC_Keywords: Globules ; Nebulae 

Description: (adapted from Anne C. Raugh, NASA STI-T-1-5810-508-86)
    The catalog is a compilation of data gleened from a study of the
    European Southern Observatory Quick Blue Survey (ESO(b)) and SRC-J Sky
    Atlas on 489 dark clouds and 331 globules. The data compiled include
    position, size, opacity and morphological classification (in the
    system of van den Bergh, 1972). Also included is a FITS file containing
    a 500x1400 pixel map of the survey area.

File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
darkneb        110        489    The Dark Clouds
globules       110        331    The Globules
skymap.dat     500       1400    *Map of survey area as numbers
skymap.fit    2880        488    FITS Map of survey area
--------------------------------------------------------------------------------
Note on skymap.dat: image of the survey area where each byte represents
    one pixel and holds a grey-level value in the range 0-6, 0 being clear
    and 6 most opaque. Pixels are separated by 0.1 degree in both latitude
    and longitude.

Byte-by-byte Description of file: darkneb, globules
--------------------------------------------------------------------------------
   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1-  3  I3     ---     FEST     Running Number
   6-  8  I3     ---     Field    Field number in ESO/SRC Survey
  10- 12  A3     ---     Foil     Foil (SRC) or Plate (ESO) (1)
  14- 17  A4     ---     Seq      Number in field (2)
  18- 19  A2     ---     Desc     Two-letter code description (3)
  22- 27  F6.2   deg     GLON     Galactic longitude of center
  29- 34  F6.2   deg     GLAT     Galactic latitude of center
  37- 38  I2     h       RAh      Right Ascension 1950 (hours)
  40- 43  F4.1   min     RAm      Right Ascension 1950 (minutes)
      46  A1     ---     DE-      Declination 1950 (sign)
  47- 48  I2     deg     DEd      Declination 1950 (degrees)
  50- 51  I2     arcmin  DEm      Declination 1950 (minutes)
  53- 58  F6.3   deg2    Area     ? Area (for dark nebulae)
  59- 60  I2     ---     Mult     ? Number of globules ("globules" file) (8)
      62  I1     ---     OpClass  [1/6]   Opacity class (4)
  63- 67  A5     ---     Class    van den Bergh Classification (5)
  70- 72  I3     deg     i        [-90/90]? Galactic inclination angle (6)
  75- 80  F6.1   mm      Xmm      [-260/1300]  X-plate coordinate
  82- 87  F6.1   mm      Ymm      [-260/300]   Y-plate coordinate
  90-120  A31    ---     Ident    Cross-references (7)
--------------------------------------------------------------------------------
Note (1): In general, the SRC-J foils were the primary source of data
    and the corresponding ESO(B) glass plates were used as a validity check.
    When the foil was not available the plate became the primary source.
    "ESO" indicates the data were taken from the ESO(B) glass plate of
          the survey field.
    "SRC" indicates the data were taken from the SRC-J foil of
          the survey field.
Note (2): Generally this is an integer, but in two cases (both globular
    filaments) this is a Roman numeral, right-justified within the
    character field.
Note (3): the two-letter code describing the appearance of the object:
      CG  Cometary globule
      DC  Dark cloud
      DF  Dark filament
      EN  Embedded in (bright) nebulosity
      GF  Globular filament
      ST  Worm track or elephant trunk (equivalent to WT)
      TA  Tail of a cometary globule
      WT  Worm track or elephant trunk (equivalent to ST)
Note (4): Opacity on a scale of 1 to 6, 6 being the most opaque.
Note (5): van den Bergh classification scheme consists of four
    different classes, each denoted by a single Greek letter:
    ALPHA  Amorphous cloud exhibiting very fuzzy or indistinct edges
    BETA   Clouds with some structure and relatively well-defined edges
    GAMMA  Absorption features with sharp edges which are not located
           in H II regions
    DELTA  Sharp-edged absorption features located in H II regions
    For objects that fall between classes, the Greek letters are
    abbreviated as A B G D respectively.
    For some cometary globules the head and tail have distinct
    opacities and van den Bergh classifications.
Note (6): Inclination angle of elongated dark clouds measured
    counterclockwise against the galactic plane,:eq. in degrees.
Note (7): Cross references consist in two-letter code followed by an
    up to three-digit number that identifies the object as also being
    listed in the reference denoted by the letter code.
    SL  Sandqvist and Lindroos
    S   Sandqvist (1977)
    CG  Zealy et al. (1983)
    The numbers are those of the object in the cited paper.
    In some cases the object appeared in more than one paper, in which
    case there are two or more full references, or appears more than once
    in a single paper, in which case the additional numbers are separated
    by commas (for example, the cross-reference for dark nebula number 225
    is S 155,157)
Note (8): if the object is actually a complex of globules, Mult is the
    number of individual globules. The coordinates given refer to the
    approximate center of the entire complex.

References:
  Feitzinger, J. V. and Stuewe, J. A. 1984, Astron. Astrophys. Suppl.
    Ser. 58, 365
  Sandqvist, Aa. 1977, Astron. Astrophys. 57, 467
  van den Bergh, S. 1972, Vistas in Astron. 13, 265
  Zealy, W. J., Ninkov, Z., Rice, E., Hartley, M., and Tritton, S. B. 1983,
    Astrophys. Letters 23, 119

Historical Notes:
  * 1986 (Anne C. Raugh, ADC):
    The catalogue was sent to the Astronomical Data Center (ADC), NASA
    Goddard Space Flight Center, by the Centre de Donnees Astronomiques
    (CDS), in February 1986.
    The original tape contained four text files formatted in the same
    manner as in the published catalog.
    The catalog was so well formatted that the only editing done was to
    correct several minor typographic errors and to replace the character
    string "---" indicating a null value for the inclination field, with a
    string of blanks, in order to avoid errors in trying to read that
    field with a FORTRAN I5 format. A FORTRAN program was run that checked
    the validity of each field according to its data type and value.
  * 13-Jun-1995: standardised at CDS, and homogenized the formats of the
    two files "darkneb" and "globules" such that they share the same
    "Byte-by-Byte description"
================================================================================
(End)          Anne C. Raugh [ADC]       Francois Ochsenbein [CDS]   13-Jun-1995

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