J/AJ/123/2976 The UZC-SSRS2 group catalog (Ramella+, 2002)
The UZC-SSRS2 group catalog.
Ramella M., Geller M.J., Pisani A., da Costa L.N.
<Astron. J. 123, 2976 (2002)>
=2002AJ....123.2976R 2002AJ....123.2976R
ADC_Keywords: Clusters, galaxy ; Radial velocities ; Redshifts ;
Cross identifications
Keywords: catalogs - galaxies: clusters: general -
galaxies: distances and redshifts
Abstract:
We apply a friends-of-friends algorithm to the combined Updated Zwicky
Catalog (UZC, Cat. J/PASP/111/438 )and Southern Sky Redshift Survey
(SSRS2, Cat. J/AJ/116/1) to construct a catalog of 1168 groups of
galaxies; 411 of these groups have five or more members within the
redshift survey. The group catalog covers 4.69 sr, and all groups
exceed the number density contrast threshold, δP/P=80. We
demonstrate that the groups catalog is homogeneous across the two
underlying redshift surveys; the catalog of groups and their members
thus provides a basis for other statistical studies of the large-scale
distribution of groups and their physical properties. The median
physical properties of the groups are similar to those for groups
derived from independent surveys, including the ESO Key Programme and
the Las Campanas Redshift Survey. We include tables of groups and
their members.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 1168 UZC-SSRS2 Group Catalog
table2.dat 48 6846 USGC Member Galaxies
table3.dat 12 149 Cross-references for RPG97 Groups
table4.dat 14 60 Cross-references for RASSCALS
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See also:
J/A+A/391/35 : Compact Groups in the UZC galaxy sample (Focardi+, 2002)
J/PASP/111/438 : Updated Zwicky catalog (UZC) (Falco+, 1999)
J/AJ/116/1 : Southern Sky Redshift Survey (SSRS2) (Da Costa+, 1998)
J/AJ/113/483 : Groups of Galaxies (Ramella+ 1997)
J/ApJ/534/114 : RASSCALS: X-ray and optical study (Mahdavi+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- USGC Identification number (G1)
6- 8 I3 --- Num Number of member galaxies
10- 11 I2 h RAh Hour of Right Ascension (J2000)
13- 14 I2 min RAm Minute of Right Ascension (J2000)
16- 19 F4.1 s RAs Second of Right Ascension (J2000)
21 A1 --- DE- Sign of the Declination (J2000)
22- 23 I2 deg DEd Degree of Declination (J2000)
25- 26 I2 arcmin DEm Arcminute of Declination (J2000)
28- 29 I2 arcsec DEs Arcsecond of Declination (J2000)
31- 35 I5 km/s cz Mean redshift
37- 40 I4 km/s e_cz The velocity dispersion in cz
42- 45 F4.2 Mpc Rad Virial radius in units Mpc/h (2)
47- 51 F5.2 [solMass] log(M) Logarithm of the virial mass in solar units
53- 57 F5.2 [Sun] log(M/L) Log of the mass-to-light ratio in solar units
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Note (2): Where H0 = 100h.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- USGC Identification number (G1)
7- 9 I3 --- Num Number of member galaxies
11- 12 I2 h RAh Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 20 F4.1 s RAs Second of Right Ascension (J2000)
22 A1 --- DE- Sign of the Declination (J2000)
23- 24 I2 deg DEd Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 30 I2 arcsec DEs Arcsecond of Declination (J2000)
33- 36 F4.1 mag mag Magnitude (UNNN: Zwicky Bmag, SNNN: SSRS2 mag)
38- 42 I5 km/s HRV Heliocentric radial velocity
45- 47 I3 km/s e_HRV Error in HRV
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- RPG
4- 6 A3 --- RPG97 The Ramella et al. (1997, Cat. J/AJ/113/483)
group label (1)
8- 11 A4 --- USGC This paper group label (G1)
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Note (1): Only Ramella et al. (1997, Cat. J/AJ/113/483) groups
with Nmember≥5.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- RASSCALS The RASSCALS (Mahdavi et al., 2000,
Cat. J/ApJ/534/114) label (1)
10- 13 A4 --- USGC This paper group label (G1)
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Note (1): Only Madhavi et al., 2000, Cat. J/ApJ/534/114, groups with extended
X-ray emission.
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Global notes:
Note (G1): Identification number:
U = USGC, (Nos U001-U864) in Simbad
S = SSRS2, (Nos S001-S304) in Simbad
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 06-Sep-2002