J/AJ/137/2981 Northern Optical Cluster Survey. III. (Gal+, 2009)
The Northern Sky Optical Cluster Survey.
III. A cluster catalog covering pi steradians.
Gal R.R., Lopes P.A.A., De Carvalho R.R., Kohl-Moreira J.L., Capelato H.V.,
Djorgovski S.G.
<Astron. J., 137, 2981-2999 (2009)>
=2009AJ....137.2981G 2009AJ....137.2981G
ADC_Keywords: Surveys ; Clusters, galaxy ; X-ray sources ; Redshifts ;
Morphology
Keywords: catalogs - galaxies: clusters: general -
large-scale structure of universe - surveys
Abstract:
We present the complete galaxy cluster catalog from the Northern
Sky Optical Cluster Survey, a new, objectively defined catalog of
candidate galaxy clusters at z≲0.25 drawn from the Digitized
Second Palomar Observatory Sky Survey (DPOSS). The data presented here
cover the Southern Galactic Cap, as well as the less well-calibrated
regions of the Northern Galactic Cap. In addition, due to improvements
in our cluster finder and measurement methods, we provide an updated
catalog for the well-calibrated Northern Galactic Cap region
previously published in Paper II (Cat. J/AJ/125/2064). The complete
survey covers 11411deg2, with over 15000 candidate clusters.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 90 15502 Cluster Properties
table2.dat 18 19992 Completeness Functions
table3.dat 43 10575 Substructure Measurements
table5.dat 60 2680 X-ray Measurements
--------------------------------------------------------------------------------
See also:
J/AJ/125/2064 : Northern Optical Cluster Survey. II. (Gal+, 2003)
J/AJ/128/1017 : Northern Optical Cluster Survey. IV. (Lopes+, 2005)
J/MNRAS/392/135 : Galaxy clusters from SDSS (Lopes+, 2009)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [NSC] for Northern Sky Cluster
5- 18 A14 --- NSC Cluster identification, JHHMMSS+DDMMSS
20- 28 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000) (1)
30- 37 F8.5 deg DEdeg Declination in decimal degrees (J2000) (1)
39- 40 I2 --- Ndet Number of times cluster detected in 11
detection passes
42- 47 F6.4 --- Mean redshift from 10 photo-z runs
49- 54 F6.4 --- e_ Error in (2)
56- 59 F4.1 --- Ng Mean richness from ten richness runs
61- 64 F4.1 --- e_Ng Error in Ng
66- 71 F6.3 [solLum] Lopt The r-band optical luminosity
73- 77 F5.3 [solLum] e_Lopt Error in Lopt
79- 82 F4.2 Mpc Mean offset from original detected position in
10 photo-z runs (3)
84- 90 F7.2 --- beta ? The β substructure parameter (4)
--------------------------------------------------------------------------------
Note (1): For clusters where the photometric redshift estimator succeeded,
this is the mean of the recentered positions. Where the photo-z
failed, this is the original detected position.
Note (2): Including the contribution from the scatter in the photo-z
relation and the multiple photo-z runs.
Note (3): If the photo-z failed, this is left blank.
Note (4): This was only calculated for clusters at 0.069≤zphot≤0.196.
For a symmetric distribution β∼0.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Plate Plate number (1)
5- 7 I3 --- Ng Richness
9- 12 F4.2 --- z Photometric redshift
14- 18 F5.1 % RRate Recovery rate of clusters with given z
--------------------------------------------------------------------------------
Note (1): For each plate, there are 42 entries, using six richnesses
(Ng=15, 25, 35, 50, 80, 120) given in the second column, at 7
redshifts (z=0.08 to 0.32 with δz=0.04) given in the third
column.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [NSC] for Northern Sky Cluster
5- 18 A14 --- NSC Cluster identification, JHHMMSS+DDMMSS
20- 25 F6.1 --- beta The β substructure parameter (1)
27- 31 F5.3 --- FE The FE substructure parameter (2)
33- 38 F6.3 --- LEE2D The Lee 2D substructure parameter (3)
40- 43 F4.1 --- AST The AST substructure parameter (4)
--------------------------------------------------------------------------------
Note (1): For a symmetric distribution β∼0, while values of β>0
indicate asymmetries.
Note (2): Values of this statistic greater than 2.5 indicate significant
deviations from circularity.
Note (3): Larger values of this statistic indicate the presence of two
subclumps in the galaxy distribution.
Note (4): This statistic takes on values near unity for substructure-free
systems, and less than 1.0 for clumpy distributions.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [NSC] for Northern Sky Cluster
5- 18 A14 --- NSC Cluster identification, JHHMMSS+DDMMSS
20- 26 F7.3 10+36W LX0.5 X-ray luminosity within 0.5h-170Mpc
27 A1 --- u_LX0.5 Uncertainty flag on LX-0.5
29- 34 F6.3 10+36W e_LX0.5 Error in LX-0.5
36- 39 F4.1 keV TX0.5 X-ray temperature within 0.5h-170Mpc
41- 47 F7.3 10+36W LX1.0 X-ray luminosity within 1.0h-170Mpc
48 A1 --- u_LX1.0 Uncertainty flag on LX-1.0
50- 55 F6.3 10+36W e_LX1.0 Error in LX-1.0
57- 60 F4.1 keV TX1.0 X-ray temperature within 1.0h-170Mpc
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Gal et al., Paper I 2000AJ....119...12G 2000AJ....119...12G
Gal et al., Paper II 2003AJ....125.2064G 2003AJ....125.2064G, Cat. J/AJ/125/2064
Lopes et al., Paper III 2005AJ....128.1017G 2005AJ....128.1017G, Cat. J/AJ/128/1017
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-May-2009