ACDS V10.0 - Sat Apr 27 06:40:54 CEST 2019
|  | 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
================================================================================
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    05-Mar-2009