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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
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 --- <z> Mean redshift from 10 photo-z runs 49- 54 F6.4 --- e_<z> Error in <z> (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 <off> 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 Gal et al., Paper II 2003AJ....125.2064G, Cat. J/AJ/125/2064 Lopes et al., Paper III 2005AJ....128.1017G, Cat. J/AJ/128/1017
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-May-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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