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J/ApJ/368/54    Velocities and Photometry for E and S0 galaxies (Dressler+ 1991)
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New velocity dispersions and photometry for E and S0 galaxies in the
great attractor
     Dressler A., Faber S.M., Burstein D.
    <Astrophys. J. 368, 54 (1991)>
    =1991ApJ...368...54D
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ADC_Keywords: Galaxies, optical; Radial velocities; Velocity dispersion;
              Magnitudes
Keywords: galaxies: distances-galaxies: internal motions-galaxies: photometry

Description: 
   New spectroscopy and photometry have been obtained for 136 elliptical
   and S0 galaxies in the direction of the large-scale streaming flow
   attributed to the great attractor. Measurements of central velocity
   dispersion (sigma), total B magnitudes (B_T), the photometric parameter
   D_n, and the absorption-line index Mgi_2 are presented. Both internal
   and external comparisons indicate that measurements of log{sigma} are
   accurate to 0.05 dex, B_T to 0.15 mag, D_n to 0.015 dex, and Mg_2 to
   0.017 mag. These data have been used in a previous paper by Dressler
   and Faber to estimate distances for these galaxies via the D_n -
   {sigma} relation. It is shown in this paper that the D_n - Mg_2
   relation also predicts the same trends of peculiar velocity with
   distance, but with less accuracy. The relative accuracy of other
   distance indicators for elliptical galaxies is also discussed.


File Summary:
--------------------------------------------------------------------------------
 FileName      Lrecl     Records      Explanations
--------------------------------------------------------------------------------
ReadMe            80           .      this file
table1.dat        74         136      catalogue of velocity, total blue
                                        magnitude, photometric diameter,
                                        velocity dispersion, and
                                        absorption-line index
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Byte-by-byte Description of file: table1.dat
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 Bytes  Format    Units    Label    Explanations
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  1-  5  I5       ---      SPS      [8,1398]+ SPS survey number (see paper)
  8- 16  A9       ---      NAME     [ 0-9A-N-]! NGC or IC number
 19- 20  A2       ---      TYPE     [ ES0]! morphological type
 23- 25  I3       ---      GRN      [22-279]? group number assigned by the
                                      authors (see paper)
 28- 31  I4       km/s     Vh       heliocentric velocity determined in this
                                      study
 34- 37  I4       km/s     Vg       []? heliocentric group velocity of each GRN
 41- 44  F4.2     mag      AB       [0,] B-band Galactic extinction
 47- 51  F5.2     mag      BT       total blue magnitude
 55- 58  F4.2  [0.1arcmin] lgDn     log of photometric diameter Dn (0.1arcmin)
 62- 66  F5.3    [km/s]    lgSIG    log of central velocity dispersion (km/s)
 70- 74  F5.3     mag      Mg2      Mg b absorption line index (see paper)
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Historical notes:
  * The data file was provided by courtesy of D.Burstein to H. Andernach;
    it was numbered A123 in H. Andernach's "List of Astronomical Catalogues
    and Documents kindly provided on request by various authors"
  * 15-Nov-1993: First archived.
    (The date of the latest archiving, see the date of each file.)
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(End)                                        Koichi Nakajima [CDS]   15-Nov-1993