Astronomical Data Center
ADC/CDS Standard Document for Catalog:
/catalogs/7/7051/

The following is the "ReadMe" document that describes this ADC catalog. You can 
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VII/51  Revised Shapley-Ames Catalog of Bright Galaxies  (Sandage+, 1981)
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Revised Shapley-Ames Catalog of Bright Galaxies
     Sandage A., Tammann G.A.
     <Carnegie Institution of Washington Publication 635 (1981)>
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ADC_Keywords: Galaxy catalog

Original description prepared by:
    Wayne H. Warren Jr.
    Astronomical Data Center
    National Space Science Data Center
    Greenbelt, Maryland 20771 USA
    1987 April

History:
    The machine-readable catalog was prepared by Dr. R. Kraan-Korteweg
    of the Astronomisches Institut der Univ. Basel, who graciously
    supplied it on magnetic tape to Ms. Lynn S. Fischer of the Jet
    Propulsion Laboratory to be used for the IRAS project. Ms. Fischer
    kindly supplied it to the Astronomical Data Center (ADC). The
    machine version was supplied "as is" to Dr. Herbert J. Rood of the
    Institute for Advanced Study, who checked certain data fields
    against the published catalog and made suggestions for improvement
    of the computer version.

    Modifications made at the ADC include the correction of several
    errors noted by Dr. Rood, the right justification and alignment of
    all galaxy designations, the removal of decimal points from some
    RA values to allow uniform computer processing, and the expansion
    of the field containing the mean error of the observed velocities
    to allow for fractional values (these had been rounded) plus the
    insertion of the correct values. Zero values in the A(i) field
    were changed to 0.00 so that the field can be read with an F
    format (there are blank fields also) and the velocity field was
    expanded so that signs could be moved to occur uniformly in byte
    66; "+" signs were added to positive values.

    A brief description of the data fields in the machine version of
    the catalog follows. The description has been prepared at the ADC
    using a handwritten description from Dr. Krann-Korteweg and the
    data description given in the published catalog (see the latter
    for more detailed descriptions and comments). This description is
    brief and almost certainly not complete, since it was assembled
    from available information without a thorough comparison of the
    machine version with the published catalog. Any codes not
    described in the table should be interpreted by comparison with
    the published catalog. A few coding errors were found and
    corrected at the ADC during the course of this work, but a
    complete check has not been made; thus, the ADC takes no
    responsibility for any errors found.

    This "ReadMe" file was later standardized at CDS.

File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
catalog.dat     75       1246    The Catalogue
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Byte-by-byte Description of file: catalog.dat
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   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1-  7  A7     ---     Name     Galaxy identification
   9- 10  I2     h       RAh      Right Ascension 1950 (hours)
  11- 12  I2     min     RAm      Right Ascension 1950 (minutes)
  13- 14  I2     s       RAs      Right Ascension 1950 (seconds)
      15  A1     ---     DE-      Declination 1950 (sign)
  16- 17  I2     deg     DEd      Declination 1950 (degrees)
  18- 21  F4.1   arcmin  DEm      Declination 1950 (minutes)
  22- 32  A11    ---     Type1    Codes for galaxy types (1)
      33  A1     ---     op       For double descriptions (if second type
                                      mentioned) 'R' (or) '+' (and)
  34- 44  A11    ---     Type2    Description of second type (1)
      45  A1     ---     Rem      Remarks (2)
      46  A1     ---     u_Rem    [?] '?' for ?
  47- 49  F3.1   ---     Lum      ? Luminosity class (3)
      50  A1     ---     LumC     Luminosity class code (4)
      52  A1     ---     left     Left bracket
  53- 57  F5.2   mag     B(T)     Apparent magnitude B(T)
      58  A1     ---     u_B(T)   [)] Right bracket
  59- 62  F4.2   mag     A(i)     ? Internal absorption A(i)
      63  A1     ---     n_A(i)   '*' for special values of A(i)
  64- 65  A2     ---     Member   Group or cluster membership (see Table 2,
                                        p. 10 of published catalog)
                                    Codes L, S, N, C, M, V, VR, F
  66- 70  I5     km/s    Vel      ? Mean weighted velocity from all available
                                    determinations (km/s)
  71- 75  F5.1   km/s    e_Vel    ? error in velocity
--------------------------------------------------------------------------------
Note (1): The codes for galaxy types are made of the following bytes:
  +0 (22)  'C' cD galaxy
           'D' dwarf for E, S0, S and I
           'M' merged
           'P' pseudo outer ring
           'R' outer ring
           '?' ?
  +1 (23)  'U' the preceding description is in parentheses (uncertain)
           '?' ?
  +2 (24)  Code for main galaxy type:
           'D' cD galaxy
           'P' peculiar
           'E' E
           'F' E/S0
           'K' S0/E
           'L' S0
           'S' S (S0/a-Sm)
           'I' I (for Im or amorphous = I0)
           '-' E-S0, amorphous
           '+' S0/a-Im
  +3 (25)  Code for description of bar:
           'A' no bar
           'B' bar
           'X' either S/SB or SAB
           'Y' S(B)
  +4 (26)  Code for index that follows S0:
           '1' 1
           '2' 1-2
           '3' 2
           '4' 2-3
           '5' 3
           '6' 1-3
  +5 (27)  Ellipticity of S0 [in () following S0 and index, e.g. E/S0(2/3)(4)]
           (for E/S0, S0/E, S0, S0/a)
           '1' ( 1)
           '2' ( 2)
           '.'   .
           '9' ( 9)
           'Z' (10)
  +6 (28)  Inner ring structure:
           'S' (s)
           'R' (r)
           'T' (rs)
           'Q' (sr)
  +7 (29)  Further description of main galaxy type, cases
           (a) = ellipticity for E (e.g. E4, E5/S0, ...)
           (b) = spirality for S (same as RC2) :
                (a) (b)
           '0'  E0  S0/a
           '1'  E1  Sa
           '2'  E2  Sab
           '3'  E3  Sb
           '4'  E4  Sbc
           '5'  E5  Sc
           '6'  E6  Scd
           '7'  E7  Sd
           '8'  Sdm
           '9'  Sm (Im)
  +8 (30)  Code for further description (byte +7)
           ':' followed by :
           '?' followed by ?
           'U' in ()
  +9 (31)  ':' whole type is uncertain
           '?' ? following whole type
           'U' whole type in parentheses ()
           'V' whole type in brackets []
  +10 (32) 'P' pec
           'B' (pec)
           'F' pec:
           'G' pec?
Note (2): the remarks are
      'D' (dust)
      'J' (jet)
      'L' (late)
      'M' (merged)
      'N' (nearly on edge)
      'O' (on edge)
      'P' (prolate)
      'R' (ring)
      'T' (tides)
      'V' (very early)
Note (3): the Luminosity class is coded as follows:
      '1.0' I
      '1.5' I-II
      '2.0' II
      '2.5' II-III
      '3.0' III
      '3.5' III-IV
      '4.0' IV
      '4.5' IV-V
      '5.0' V
      '2.2' II.2 (intermediate classes)
      '3.2' III.2 etc.
Note (4): the Luminosity class code is defined as follows:
      ':' luminosity class followed by :
      'U' luminosity class enclosed in ()
      'V' luminosity class in form (LC):
      'W' luminosity class in form (LC:)

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(End)                                                        [CDS]   08-Feb-1995

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