ACDS V10.0 - Detailed Description of J/ApJS/121/287

ACDS V10.0 - Sun Jan 19 12:47:29 CET 2025

| # Detailed Description of J/ApJS/121/287 : The CfA2S catalog (Huchra+, 1999) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    J/ApJS/121/287      The CfA2S catalog                        (Huchra+, 1999)
    ================================================================================
    The CfA redshift survey: data for the South Galactic Cap.
           Huchra J.P., Vogeley M.S., Geller M.J.
          <Astrophys. J. Suppl. Ser. 121, 287 (1999)>
          =1999ApJS..121..287H      (SIMBAD/NED BibCode)
    ================================================================================
    ADC_Keywords: Galaxies, optical ; Redshifts

    Keywords: galaxies: distances and redshifts -
              large-scale structure of universe - surveys

    Abstract:
        We present redshifts for a sample of 4391 galaxies with magnitude
        mB(0)<=15.5 covering 20h<=RA<=4h in right ascension and
        -2.5°<=DE<=90° in declination. This sample is complete for all
        galaxies in the merge of the Zwicky et al. and Nilson catalogs in the
        south Galactic cap. Redshifts for 2964 of these were measured as part
        of the second CfA Redshift Survey. The data reveal large voids in the
        foreground and background of the Perseus-Pisces Supercluster. The
        largest of these voids lies at a mean velocity ~8000km/s, has diameter
        ~5000km/s, and is enclosed by a complex of dense structures. The large
        structure known as the Perseus-Pisces Supercluster forms the near side
        of this complex. On the far side of this large void, at a mean
        velocity ~12000km/s, there is another coherent dense wall. The
        structures in this survey support the view that galaxies generally lie
        on surfaces surrounding or nearly surrounding low-density regions or
        voids.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × cfa2s.dat         98     4278   CfA survey radial velocities (tables 1 + 4)
    × refs.dat         133      132   References to cfa2s.dat (table2 of paper)
    × notes.dat         63      408   Other names of galaxies and notes (table3)
    × clusters.dat      41       32   Redshifts of Abell and other clusters (table6)

    See also:
       VII/193 : The CfA Redshift Catalogue, Version June 1995 (Huchra+ 1995)

    Byte-by-byte Description of file:  cfa2s.dat

       Bytes Format Units   Label     Explanations

       1- 11  A11   ---     Name      Name of the galaxy
      13- 14  I2    h       RAh       Right ascension (1950)
      16- 17  I2    min     RAm       Right ascension (1950)
      19- 22  F4.1  s       RAs       Right ascension (1950)
          24  A1    ---     DE-       Declination sign (1950)
      25- 26  I2    deg     DEd       Declination (1950)
      28- 29  I2    arcmin  DEm       Declination (1950)
      31- 32  I2    arcsec  DEs       Declination (1950)
      34- 38  F5.2  mag     mZW       Apparent blue magnitude in Zwicky-B(0) system
          39  A1    ---     ms        [BHMS] Magnitude source (1)
      41- 45  I5    km/s    HRV       ? Heliocentric radial velocity
      47- 49  I3    km/s    e_HRV     ? rms uncertainty on HRV
      51- 53  A3    ---     r_HRV     Velocity source (see refs.dat)
      55- 56  I2    ---     HType     ? Revised Hubble type (2)
          58  A1    ---     Bar       Bar type (3)
          60  I1    ---     Pec       ? Peculiarities (4)
          62  A1    ---     Lum       Luminosity classes (5)
      64- 68  F5.1  arcmin  diamMaj   ? Major axis diameter
      70- 73  F4.1  arcmin  diamMin   ? Minor axis diameter
      75- 80  I6    ---     UGC       ? UGC number
          81  A1    ---     m_UGC     Multiplicity index on UGC
      83- 98  A16   ---     Note      Notes (6)

    Note (1):
           H: Split Zwicky magnitude (for multiple galaxies)
           B: BT magnitude converted to the B(0)-Zwicky system
           M: Markarian & Lipovetskii, 1974 (reference not specified)
           S: Sakai, Giovanelli & Wegner, 1994AJ....108...33S
    Note (2): Hubble types:
          -7: Unclassified elliptical
          -6: Compact elliptical
          -5: E, dwarf elliptical
          -4: E/S0
          -3: L-, SO-
          -2: L, SO
          -1: L+, SO+
           0: SO/a, SO-a
           1: Sa
           2: Sab
           3: Sb
           4: Sbc
           5: Sc
           6: Scd
           7: Sd
           8: Sdm
           9: Sm, Magellanic spiral
          10: Im, Irr I, Magellanic irregular, Dwarf irregular
          11: Compact irregular, extragalactic H II region
          15: Peculiar, unclassifiable
          16: Irr II
          20: S..., Sc-Irr, unclassified spiral
    Note (3): Bar types:
           A: A, unbarred
           X: X, AB, mixed type
           B: B, barred.
    Note (4): Peculiarities:
           P: Peculiar
           S: No inner ring
           R: Ringed (outer)
           U: Unclassifiable
           T: Pseudo inner ring
           D: Double or multiple
    Note (5): Luminosity Classes (for Spirals and Irregulars)
           1: I
           2: I-II
           3: II
           4: II-III
           5: III
           6: III-IV
           7: IV
           8: IV-V
           9: V
    Note (6): This column includes comments, notes, and references to other
        catalogs, and starts by an asterisk (*) for misclassified galaxies
        originally listed in table 4.
        Discrepant velocities are listed here along with the reference to
        their source. These entries look like "nnnn mm (xxx)", where nnnn is
        the velocity, mm is the quoted error (if any) and xxx is the source of
        the discrepant velocity.  Additional notes are in notes.dat file.

        Other object designations include
          HCG = Hickson compact group,
           MK = Markarian,
          KDG = Karachentsev double galaxy,
           VV = Vorontosov-Velyaminov interacting galaxy,
           AK = Arakelian high surface brightness galaxy,
           Zw = Zwicky compact or peculiar galaxy,
         EMSS = Einstein Medium Sensitivity Survey,
          Kaz = Kazarian galaxy, etc.

    Byte-by-byte Description of file:  refs.dat

       Bytes Format Units   Label     Explanations

       1-  3  A3    ---     Ref       Reference code in cfa2s.dat
       5- 23  A19   ---     BibCode   BibCode
      25- 52  A28   ---     Aut       Author's names
      54-133  A80   ---     Com       Comments

    Byte-by-byte Description of file:  notes.dat

       Bytes Format Units   Label       Explanations

       1- 11  A11   ---     Name        Galaxy name
      13- 63  A51   ---     OtherNames  Alternate Names and remarks

    Table 4 : CFA survey: non galaxies
    --------------------------------------------------------------------------------
      Name         RA   (1950)  DE      mZW     UGC    Notes
    --------------------------------------------------------------------------------
     20372+2704A 20:37:18.1  27:04:28   10.5   11608   IV Zw 64 South, star
     20372+2704B 20:37:18.6  27:04:42   10.5   11609   IV Zw 64 North, star
     20393+0525  20:39:21.1  05:24:53   15.0           G star + fuzz
     21256+0823  21:25:38.3  08:24:27   15.5           G star+ reflection neb?
     21296+3418  21:29:36.1  34:18:28   13.8   11761   IV Zw 71, A star
     21298+2955  21:29:46.1  29:55:15   13.0   11762   IV Zw 72, extremely compact,
                                                        A-F star
     21478+3443  21:47:51.2  34:42:50   14.0   11823   IV Zw 78, K star
     22341+7523  22:34:06.0  75:23:00   14.7   12105   Misidentified in UGC,
                                                        coords 1 hr off
     23061+4638  23:06:06.0  46:38:12   13.8   12389   F stars + reflection neb?

    Byte-by-byte Description of file:  clusters.dat

       Bytes Format Units   Label     Explanations

       1- 14  A14   ---     Name      Cluster name
      16- 17  I2    h       RAh       Right ascension (1950)
      19- 22  F4.1  min     RAm       Right ascension (1950)
          24  A1    ---     DE-       Declination sign (1950)
      25- 26  I2    deg     DEd       Declination (1950)
      28- 29  I2    arcmin  DEm       Declination (1950)
          31  I1    ---     R         ? Cluster Richness class (from Cat. VII/110)
          33  I1    ---     D         ? Distance class (from Cat. VII/110)
      35- 40  F6.4  ---     z         Redshift

    History: From ApJS electronic version
             * 20-Apr-2010: IC 2019 counterpart is UGC 2930 instead of UGC 2936.
    ================================================================================
    (End)                          James Marcout,  Patricia Bauer [CDS]  14-Sep-1999