ACDS V10.0 - Thu Apr 25 02:57:10 CEST 2019
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Detailed Description of J/ApJ/660/239 : MaxBCG catalog of 13823 galaxy clusters from SDSS (Koester+, 2007)
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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)
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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
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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