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J/A+AS/100/47 Lyon Groups of Galaxies (Garcia 1993)
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General study of group membership. II. Determination of nearby groups.
Garcia A.M.
<Astron. Astrophys. Suppl. Ser. 100, 47 (1993)>
=1993A&AS..100...47G
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ADC_Keywords: Clusters, galaxy ;
Keywords: galaxies: clustering - numerical methods - catalogs
Description:
The catalog of nearby groups of galaxies was created from the sample
of galaxies complete up to the limiting apparent magnitude Bo=14.0
with a recession velocity smaller than 5500km/s. Two methods were used
in group construction: a percolation method derived from Huchra and
Geller (1982ApJ...257..423H) and a hierarchical method initiated by
Tully (1980ApJ...237..390T). The catalog presented here is a
synthesized version of the two results.
Remark:
A few differences exist compared to the printed version:
these are small errors which have been corrected by the author
(April 1994)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 485 Group data
table2.dat 55 3933 Membership of nearby galaxies
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- LGG [1,485] Group number (Lyon Group of Galaxies)
6- 18 A13 --- Name Group identification with the name of
the brightest galaxy in the group
20- 21 I2 --- Ngal Number of galaxies in the group
24- 25 I2 h RAh Right Ascension 1950 (hours)
26- 27 I2 min RAm Right Ascension 1950 (minutes)
28- 31 F4.1 s RAs Right Ascension 1950 (seconds)
32 A1 - DE- Declination 1950 (sign)
33- 34 I2 deg DEd Declination 1950 (degrees)
35- 36 I2 arcmin DEm Declination 1950 (minutes)
37- 38 I2 arcsec DEs Declination 1950 (seconds)
41- 44 I4 km/s RV Luminosity-weighted mean radial velocity
47- 59 A13 --- Fouque Cross-identification with Fouque et al.
(1992A&AS...93..211F)
60- 71 A12 --- GH/HG Cross-identification with Geller & Huchra
(1983ApJS...52...61G) and Huchra & Geller
(1982ApJ...257..423H)
72- 85 A14 --- Tully Cross-identification(s) with Tully (1987,
Sat. <VII/145>)
86- 93 A8 --- MCL Cross-identification with Maia et al.
(1989ApJS...69..809M) or other
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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- 3 A3 --- --- [LGG] Catalog acronym (Lyon Group of Galaxies)
5- 7 I3 --- LGG [1,485] Group number
9- 11 A3 --- --- [PGC] Acronym of Principal Galaxies Catalog
12- 16 I5 --- PGC PGC number according to
Paturel et al. 1989a,b) (1)
18- 29 A12 --- Other Identification with an alternative name
31- 32 I2 h RAh Right ascension 1950
33- 34 I2 min RAm Right ascension 1950
35- 38 F4.1 s RAs Right ascension 1950
39 A1 --- DE- Declination sign
40- 41 I2 deg DEd Declination 1950
42- 43 I2 arcmin DEm Declination 1950
44- 45 I2 arcsec DEs Declination 1950
47 A1 --- T Morphological type coded according to RC3,
when it is known (2)
49- 52 I4 km/s Vel Mean heliocentric radial velocity
53- 54 A2 --- Note [*P*H+ ] (3)
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Note (1): Paturel et al. 1989a, 1989A&AS...80..299P, Cat. <VII/119>
Paturel et al. 1989b, Extragalactic Data Base Monographs 1,
Vol. 1, 2, 3 (PGC), Cat. <VII/119>
Note (2): de Vaucouleurs et al. 1991, Third Reference Catalogue of Bright
Galaxies (New York: Spinger Verlag) Vol. I, II, III (RC3), Cat. <VII/155>
Note (3): the flag has the following meaning:
'*P' when given from the percolation method only,
'*H' when given from the hierarchical method only,
'+' for galaxies added afterwards
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References:
Garcia et al., Paper I, 1993A&AS...98....7G
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(End) Patricia Bauer [CDS] 17-Nov-1993