ACDS V10.0 - Detailed Description of J/ApJ/660/239

ACDS V10.0 - Tue Dec 17 22:59:40 CET 2024

| # Detailed Description of J/ApJ/660/239 : MaxBCG catalog of 13823 galaxy clusters from SDSS (Koester+, 2007) |

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/ApJ/660/239 MaxBCG catalog of 13823 galaxy clusters from SDSS (Koester+, 2007)
    ================================================================================
    A MaxBCG catalog of 13,823 galaxy clusters from the Sloan Digital Sky Survey.
        Koester B.P., McKay T.A., Annis J., Wechsler R.H., Evrard A., Bleem L.,
        Becker M., Johnston D., Sheldon E., Nichol R., Miller C., Scranton R.,
        Bahcall N., Barentine J., Brewington H., Brinkmann J., Harvanek M.,
        Kleinman S., Krzesinski J., Long D., Nitta A., Schneider D.P., Sneddin S.,
        Voges W., York D.
       <Astrophys. J., 660, 239-255 (2007)>
       =2007ApJ...660..239K
    ================================================================================
    ADC_Keywords: Clusters, galaxy ; Redshifts ; Photometry, SDSS

    Keywords: galaxies: clusters: general

    Abstract:
        We present a catalog of galaxy clusters selected using the maxBCG
        red-sequence method from Sloan Digital Sky Survey photometric data.
        This catalog includes 13823 clusters with velocity dispersions
        greater than ~400km/s and is the largest galaxy cluster catalog
        assembled to date. They are selected in an approximately
        volume-limited way from a 0.5Gpc3 region covering 7500deg2 of sky
        between redshifts 0.1 and 0.3. Each cluster contains between 10 and
        190 E/S0 ridgeline galaxies brighter than 0.4L* within a scaled radius
        R200.

    Description:
        Data for this study are drawn from the Sloan Digital Sky Survey a
        combined imaging and spectroscopic survey of 104deg2 in the north
        Galactic cap and a smaller region in the south. The imaging survey was
        carried out using a specially designed 2.5m telescope in drift-scan
        mode in five SDSS filters (u, g, r, i, and z) to a limiting magnitude
        of r<22.5.

        The maxBCG galaxy cluster selection algorithm applied to the input
        galaxy catalog is described in more detail in a companion paper
        (Koester et al., 2007ApJ...660..221K).

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table1.dat        97    13823   Cluster catalog

    See also:
         II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)
         http://www.sdss.org : SDSS Home Page

    Byte-by-byte Description of file:  table1.dat

       Bytes Format Units   Label     Explanations

       1- 14 F14.10 deg     RAdeg     BCG Right Ascension in decimal degrees (J2000)
      16- 29 F14.10 deg     DEdeg     BCG Declination in decimal degrees (J2000)
      31- 38  F8.6  ---     zph       Photometric redshift
      40- 49  F10.7 ---     zsp       ?=-1.00000 Spectroscopic BCG redshift
      51- 59  F9.6 10+10solLum LBr    BCG r-band luminosity
      61- 69  F9.6 10+10solLum LBi    BCG i-band luminosity
      71- 79  F9.5 10+10solLum LTr    Total r-band luminosity
      81- 89  F9.5 10+10solLum LTi    Total i-band luminosity
      91- 93  I3    ---     Ngal      Detection richness
      95- 97  I3    ---     NR200     Scaled richness (1)

    Note (1): the scaled richness is the number of E/S0 member galaxies
         brighter than 0.4L* and within R200 of the cluster center,
         R200 being the radius within which the density of galaxies with
         -24mag<=Mr<=-16mag is 200 times the mean density of such galaxies.

    Nomenclature note:
        Clusters identified as [KMA2007] DDD.ddddd+DD.ddddd in Simbad

    History:
        From electronic version of the journal
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    (End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    05-Mar-2009