J/ApJS/106/1 EFAR cluster and galaxy selection (Wegner+, 1996)
The peculiar motions of early-type galaxies in two distant regions.
I. Cluster and galaxy selection.
Wegner G., Colless M., Baggley G., Davies R.L., Bertschinger E.,
Burstein D., McMahan R.K.Jr, Saglia R.P.
<Astrophys. J. Suppl. Ser. 106, 1 (1996)>
=1996ApJS..106....1W 1996ApJS..106....1W
ADC_Keywords: Galaxies, spectra ; Redshifts ; Velocity dispersion
Keywords: galaxies: clusters: general - galaxies: distances and redshifts -
galaxies: elliptical and lenticular, cD - surveys
Abstract:
The EFAR project is a study of 736 candidate elliptical galaxies in 84
clusters lying in two regions, toward Hercules-Corona Borealis and
Perseus-Pisces-Cetus, at distances cz∼6000-15000km/s. In this paper
(the first of a series), we present an introduction to the EFAR
project and describe in detail the selection of the clusters and
galaxies in our sample. Fundamental data for the galaxies and clusters
are given, including accurate new positions for each galaxy and
redshifts for each cluster. The galaxy selection functions are
determined by using diameters measured from Schmidt sky survey images
for 2185 galaxies in the cluster fields. Future papers in this series
will present the spectroscopic and photometric observations of this
sample, investigate the properties of the fundamental plane for
elliptical galaxies, and determine the large-scale peculiar velocity
fields in these two regions of the universe.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cluster.dat 11 85 Cluster sample
table3.dat 92 795 Master list of EFAR sample galaxies
table4.dat 44 86 Selection regions and selection function parameters
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See also:
J/MNRAS/305/259 : EFAR galaxies redshifts + velocity dispersions (Wegner+ 1999)
J/MNRAS/292/499 : EFAR photometric data (Saglia+, 1997)
J/MNRAS/321/277 : EFAR peculiar velocities (Colless+, 2001)
Byte-by-byte Description of file: cluster.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- CID Cluster Identification number
4- 10 A7 --- Cluster Cluster name
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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 I3 --- GIN Galaxy Identification Number
5- 11 A7 --- Cluster Cluster name
13- 15 A3 --- Gal Galaxy identification in the cluster
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 27 F5.2 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 45 F5.3 mag AR R band extinction
47- 52 F6.2 deg GLON Galactic longitude
54- 59 F6.2 deg GLAT Galactic latitude
61- 64 F4.2 [arcsec] logDW ? Optical major-axis diameter
66- 93 A28 --- Com Comments
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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- 2 I2 --- CID Cluster Identification number
4- 5 I2 h RAh Right ascension of the center rectangle (J2000)
7- 10 F4.1 min RAm Right ascension of the center rectangle (J2000)
12 A1 --- DE- Declination sign of the center rectangle (J2000)
13- 14 I2 deg DEd Declination of the center rectangle (J2000)
16- 17 I2 arcmin DEm Declination of the center rectangle (J2000)
19- 24 F6.2 arcmin DRA Length of the sides of the rectangle
26- 31 F6.2 arcmin DDE Height of the sides of the rectangle
33- 34 I2 --- Nw ? Total number of Dw diameter measured
in the field
36- 38 F3.1 [arcsec] logD0W ? Cutoff diameter
40- 43 F4.2 --- dw ? Width of the cutoff
44 A1 --- Note [a-c] Individual Notes (1)
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Note (1): Individual Notes:
a: CID 7: Two adjacent fields; the smaller lies north of the larger
and runs nearly along the east edge
b: CID 35: Overlap with CID 36 in southwest corner
c: CID 36: Overlap with CID 35 in northwest corner. The region is
19.02' east-west and 28.53' north-south, centered at
(05h 43.6m, -25° 45'), and was excluded form this field.
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Acknowledgements: Matthew Colless
References:
Wegner et al., Paper II 1999MNRAS.305..259W 1999MNRAS.305..259W, Cat. J/MNRAS/305/259
Saglia et al., Paper III 1997MNRAS.292..499S 1997MNRAS.292..499S, Cat. J/MNRAS/292/499
Saglia et al., Paper IV 1997ApJS..109...79S 1997ApJS..109...79S
Coless et al., Paper V 1999MNRAS.303..813C 1999MNRAS.303..813C
Saglia et al., Paper VI in press
Colless et al., Paper VII 2001MNRAS.321..277C 2001MNRAS.321..277C, Cat, J/MNRAS/321/277
(End) Francois Ochsenbein [CDS] 15-Aug-1999