Access to Astronomical Catalogues

J/other/RAA/11.245  Galaxies in the field of RX J0054.0-2823    (Giraud+, 2011)
Low-ionization galaxies and evolution in a pilot survey up to z = 1.
    Giraud E., Gu Q.-S., Melnick J., Quintana H., Selman F., Toledo I.,
    Zelaya P.
   <Res. Astron. Astrophys., 11, 245-270 (2011)>
   =2011RAA....11..245G
ADC_Keywords: Galaxy catalogs ; Redshifts ; Radial velocities ; Spectroscopy

Keywords: cosmology: observations - galaxies: evolution -
          large scale structures - evolution - RX J0054.0-2823

Abstract:
    We present galactic spectroscopic data from a pencil beam of
    10.75'x7.5' centered on the X-ray cluster RXJ0054.0-2823 at z=0.29. We
    study the spectral evolution of galaxies from z=1 down to the cluster
    redshift in a magnitude-limited sample at R≤23, for which the
    statistical properties of the sample are well understood. We divide
    emission-line galaxies into star-forming galaxies, Low Ionization
    Nuclear Emission line Regions (LINERs), and Seyferts by using
    emission-line ratios of [OII],Hβ, and [OIII], and derive stellar
    fractions from population synthesis models. We focus our analysis on
    absorption and low-ionization galaxies.

Description:
    The observations (ESO program 078A-0456(A)) were obtained with the
    FORS2 instrument at the Cassegrain focus of the VLT UT1 telescope in
    multi-object spectroscopy mode with the exchangeable mask unit (MXU).
    They were acquired in service observing and were spread over the two
    periods, 78 and 80, to satisfy our observing requirements.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table5.dat       143      676   Properties of the galaxies in the field of
                             RX J0054.0-2823


Byte-by-byte Description of file: table5.dat

   Bytes Format Units   Label     Explanations

   1-  4  I4    ---     ID        Running number of observed object (1)
       5  A1    ---     m_ID      [b] Multiplicity index on ID
   7- 15  F9.6  deg     RAdeg     Right ascension in decimal degrees (J2000)
  17- 26  F10.6 deg     DEdeg     Declination in decimal degrees (J2000)
  28- 38  E11.6 ---     z         Redshift (2)
      39  A1    ---     u_z       Uncertainty flag on z
  42- 46  F5.2  mag     Rmag      ?=- Petrosian magnitude in R
  48- 54  I7    km/s    RV        ?=- Radial velocity derived from
                                      cross-correlation
  56- 59  I4    km/s    e_RV      ?=- rms uncertainty on RV (3)
  61- 64  F4.1  ---     RT        ?=- Tonry parameter (3)
      66  I1    ---     Nsp       Number of independent spectra
  68-143  A76   ---     Lines     Lines used in determining z (4)

Note (1): Galaxies with ID>1000 have z and V from Faure et al.,
     2007A&A...463..833F.
Note (2): Galaxies with z only have their redshift measured from the lines
     identified visually in the last column. Galaxies with z and V are also
     measured by cross-correlation.
Note (3): The velocity errors and Tonry parameters are products of the
     cross-correlation.
Note (4): The rest frame wavelengths of the lines used are:
   AlIII = 1855-1863Å
   FeII24 = 2344.2Å, 2374.5Å, 2382.8Å
   FeII26 = 2586.5Å, 2600.2Å
   MgII = 2796.4Å, 2803Å
   AlII = 3584ÅOII 3728.2Å
   H10 = 3797.9Å
   H9 (+MgI) = 3835Å
   NeIII = 3869Å
   H8 = 3889.1Å
   K = 3933.7Å
   H (+Hε) = 3968.5Å
   Hδ = 4101.7Å
   G = 4303Å
   Hγ = 4340.5Å
   Fe43 = 4383Å
   Ca44 = 4455Å
   Fe45 = 4531Å
   Hβ = 4861.3Å
   OIII = 4958.9Å, 5006.8Å
   Mgb = 5175Å
   E = 5270Å
   NaD = 5892Å
   Hα = 6563Å
   NII = 6584Å


Acknowledgements:
     Edmond Giraud, Edmond.GIRAUD(at)lpta.in2p3.fr
(End)                                      Patricia Vannier [CDS]    30-Jan-2012