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J/MNRAS/369/1334           FSVS Cluster Catalogue              (Sochting+, 2006)

The FSVS Cluster Catalogue: galaxy clusters and groups in the Faint Sky Variability Survey. Sochting I.K., Huber M.E., Clowes R.G., Howell S.B. <Mon. Not. R. Astron. Soc., 369, 1334-1350 (2006)> =2006MNRAS.369.1334S
ADC_Keywords: Clusters, galaxy ; Redshifts ; Galaxies, photometry Keywords: methods: statistical - catalogues - galaxies: clusters: general Abstract: We describe a large sample of 598 galaxy clusters and rich groups discovered in the data of the Faint Sky Variability Survey (FSVS). The clusters have been identified using a fully automated, semiparametric technique based on a maximum likelihood approach applied to Voronoi tessellation, and enhanced by colour discrimination. The sample covers a wide range of richness, has a density of ∼28 clusters/deg2, and spans a range of estimated redshifts of 0.05<z<0.9 with mean <z≥0.345. Assuming the presence of a cluster red sequence, the uncertainty of the estimated cluster redshifts is assessed to be σ∼0.03. Containing over 100 clusters with z>0.6, the catalogue contributes substantially to the current total of optically selected, intermediate-redshift clusters, and complements the existing, usually X-ray selected, samples. The FSVS fields are accessible for observation throughout the whole year, making them particularly suited for large follow-up programmes. The construction of this FSVS Cluster Catalogue completes a fundamental component of our continuing programmes to investigate the environments of quasars and the chemical evolution of galaxies. We publish here the list of all clusters with their basic parameters, and discuss some illustrative examples in more detail. The full FSVS Cluster Catalogue, together with images and lists of member galaxies etc., will be issued as part of the 'NOAO (National Optical Astronomy Observatories) data products', and accessible at . We describe the format of these data and access to them. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 60 600 The basic FSVS Cluster Catalogue catalog.dat 192 593 FSVS cluster catalogue cluster/* 283 593 FSVS cluster galaxies
See also: : FSVS Home Page Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 7 A7 --- --- [FSVS_CL] 8- 20 A13 --- FSVS_CL Cluster name (HHMMSS+DDMMSS) (G1) 22- 23 I2 h RAh Right ascension (J2000) (G2) 25- 26 I2 min RAm Right ascension (J2000) (G2) 28- 29 I2 s RAs Right ascension (J2000) (G2) 31 A1 --- DE- Declination sign (J2000) (G2) 32- 33 I2 deg DEd Declination (J2000) (G2) 35- 36 I2 arcmin DEm Declination (J2000) (G2) 38- 39 I2 arcsec DEs Declination (J2000) (G2) 41- 44 F4.2 --- z Estimated redshift 47- 60 A14 --- FSVSCL Cluster name in file "catalog.dat" (G1)
Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Field ? Field number 14- 19 A6 --- --- [FSVSCL] 21- 34 A14 --- FSVSCL Cluster name (JHHMMSS+DDMMSS) (G1) 39- 40 I2 h RAh [0/24] Right ascension (J2000) (G2) 42- 43 I2 min RAm Right ascension (J2000) (G2) 45- 46 I2 s RAs Right ascension (J2000) (G2) 50 A1 --- DE- Declination sign (J2000) (G2) 51- 52 I2 deg DEd Declination (J2000) (G2) 54- 55 I2 arcmin DEm Declination (J2000) (G2) 57- 58 I2 arcsec DEs Declination (J2000) (G2) 66- 68 I3 --- Nmem Number of member galaxies 75- 78 I4 --- Nall Number of all objects contained within the cluster boundary 85- 91 F7.3 arcmin+2 Area Area occupied by the cluster 99-104 F6.3 arcmin-2 Dens Projected number density of member galaxies 113-117 F5.2 mag BCG I magnitude of the brightest cluster galaxy 122-126 F5.2 mag m3 I magnitude of the third brightest member galaxy 133-137 F5.3 mag max(V-I) Maximum colour of the color-magnitude filter in which the cluster has been detected 145-147 I3 --- r Richness of the cluster 155 I1 --- f_r [0/1] 1: richness underestimated 162-166 F5.3 --- z Estimated redshift 170 I1 --- Bound [0/1] 1: parameters of the cluster may have been influenced by the field boundary 176-183 F8.3 --- CRSchi Zero-point of the cluster red sequence normalized to I=17mag 188-192 F5.3 --- CRSprob Slope of the cluster red sequence
Byte-by-byte Description of file (5 headlines): cluster/*
Bytes Format Units Label Explanations
1- 4 A4 --- --- [FSVS] 5- 23 A19 --- FSVS FSVS designation ( 28- 38 A11 --- IName Internal name 43- 49 F7.2 pix Xpos X position 54- 60 F7.2 pix Ypos Y position 65- 66 I2 h RAh Right ascension (J2000) 68- 69 I2 min RAm Right ascension (J2000) 71- 75 F5.2 s RAs Right ascension (J2000) 79 A1 --- DE- Declination sign (J2000) 80- 81 I2 deg DEd Declination (J2000) 83- 84 I2 arcmin DEm Declination (J2000) 86- 89 F4.1 arcsec DEs Declination (J2000) 94-102 F9.4 --- chi2 ?=* chi+2 value 107-113 F7.4 mag Bmag ?=99. Harris B magnitude 119-124 F6.4 mag e_Bmag ?=9.99 rms uncertainty on B magnitude 132-135 F4.1 --- f_Bmag ?=9.99 Unexplained Flag on B magnitude 141-146 F6.2 arcsec BFWHM ?=999.99 FWHM in B band 154-157 F4.2 --- Bs/g ?=9.99 Stellarity parameter from B band (1) 162-168 F7.4 mag Vmag ?=99. Harris V magnitude 174-179 F6.4 mag e_Vmag ?=9.99 rms uncertainty on Vmag 186-190 F5.1 --- f_Vmag ?=9.99 Unexplained Flag on Vmag 197-201 F5.2 arcsec VFWHM ?=999.99 FWHM in V band 209-212 F4.2 --- Vs/g ?=9.99 Stellarity parameter from V band (1) 217-223 F7.4 mag Imag ?=99. RGO I magnitude 229-234 F6.4 mag e_Imag ?=9.99 rms uncertainty in Imag 242-245 F4.1 --- f_Imag ?=9.99 Unexplained Flag in Imag 251-256 F6.2 arcsec IFWHM ?=999.99 FWHM in I band 264-267 F4.2 --- Is/g ?=9.99 Stellarity parameter from I band (1) 272-278 F7.4 mag V-I V-I colour index 283 I1 --- Memb [0/1] Cluster membership
Note (1): Stellarity index is 0 for extended object, 1 for point sources
Global notes: Note (G1): Notice that the cluster names have slightly changed between the published table4.dat (FSVS_CL) and the version from the website (FSVSCL in file catalog.dat). The FSVSCL name of table4 was added at CDS, ans is defined as the closest cluster center in the file catalog.dat Note (G2): Cluster centre, defined as the mean position of its members.
History: From electronic version of the journal and copied at
(End) Patricia Vannier, Francois Ochsenbein [CDS] 19-Jan-2007
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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