ACDS V10.0 - Detailed Description of B/bax

ACDS V10.0 - Thu Jan 16 16:25:46 CET 2025

| # Detailed Description of B/bax : The BAX Database (Blanchard+, 2004) |

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.

    B/bax               The BAX Database                 (Blanchard+, 2004)
    ================================================================================
    X-Rays Galaxy Clusters Database.
         Sadat R., Blanchard A., Kneib J.-P., Mathez G., Madore B., Mazzarella J.M.
         <Astron. Astrophys. 424, 1097 (2004)>
         =2004A&A...424.1097S        (SIMBAD/NED BibCode)
    ================================================================================
    ADC_Keywords: Clusters, galaxy ; X-ray sources

    Keywords: galaxies: clusters: general - X-rays: galaxies -
              astronomical databases: miscellaneous

    Abstract:
        We present BAX, Base de Donnees Amas de Galaxies X
        (http://bax.ast.obs-mip.fr), a multi-wavelength database dedicated to
        X-ray clusters and groups of galaxies allowing detailed information
        retrieval. BAX is designed to support astronomical research by
        providing access to published measurements of the main physical
        quantities and to the related bibliographic references: basic data
        stored in the database are cluster/group identifiers, equatorial
        coordinates, redshift, flux, X-ray luminosity (in the ROSAT band) and
        temperature, and links to additional linked parameters (in X-rays,
        such as spatial profile parameters, as well as SZ parameters of the
        hot gas, lensing measurements, and data at other wavelengths, such as
        optical and radio). The clusters and groups in BAX can be queried by
        the basic parameters as well as the linked parameters or combinations
        of these. We expect BAX to become an important tool for the
        astronomical community. BAX will optimize various aspects of the
        scientific analysis of X-ray clusters and groups of galaxies, from
        proposal planning to data collection, interpretation and publication,
        from both ground based facilities like MEGACAM (CFHT), VIRMOS (VLT)
        and space missions like XMM-Newton, Chandra and Planck.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × bax.dat          155     1713   Main parameters of the BAX database

    See also:
        http://webast.ast.obs-mip.fr/bax/ : The BAX database

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

       Bytes Format Units   Label     Explanations

       1- 23  A23   ---     Name      Name of cluster
      25- 32  F8.4  deg     RAdeg     ?=-99.99 Right ascension (J2000)
      34- 41  F8.4  deg     DEdeg     ?=-99.99 Declination (J2000)
      43- 49  F7.3  ---     z         ?=-99.99 Redshift
      51- 61  F11.6 10-15W/m2 Fx      ?=-99.99 Flux in the  0.1-2.4keV band
      63- 81  A19   ---     r_Fx      Reference (bibcode) of Fx
      83- 92  F10.6 10+37W  Lx        ?=-99.99 Luminosity in the 0.1-2.4keV band
                                      (in 1044erg/s)
      94-112  A19   ---     r_Lx      Reference (bibcode) of Lx
     114-119  F6.2  keV     Tx        ?=-99.99 Temperature of the intracluster gas
         121  A1    ---     ---       [-]
     122-127  F6.4  keV     e_Tx      ? Mean error (lower) on Tx
         129  A1    ---     ---       [+]
     130-135  F6.4  keV     E_Tx      ? Mean error (upper) on Tx
     137-155  A19   ---     r_Tx      Reference (bibcode) of Tx

    Acknowledgements: Alain Blanchard, ablancha(at)ast.obs-mip.fr

    ================================================================================
    (End)                                   Francois Ochsenbein [CDS]    07-Aug-2004