Abell 3558 (Shapley 8)
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Introduction
We present photographic b26·75
magnitudes, radii and ellipticities, together with (u - b) and (b
- r) colours for 4903 galaxies within a 4·69 square degree field
around the Shapley 8 cluster (Abell 3558).
Data Format
-
internal identification number
-
Right Ascension (1950·0)
-
Declination (1950·0)
-
b26·75, integrated
blue (b-band) magnitude within the 26·75 mag.arcsec-2
isophote
-
r*(26·75) arcsec = (A/pi)0·5
where A is the area enclosed by the 26·75 b mag.arcsec-2
isophote; an asterisk denotes an image corrected for overlap
-
epsilon = (1 - b/a), the ellipticity
of the image (usually b-band) at the outermost uncontaminated isophote
(a and b denote the major and minor semi-axes respectively)
-
theta deg, the position angle of the
major axis of the image
-
(u - b) colour of the image bounded
by an isophote of area A where
-
r*(u - b) arcsec = (A/pi)0·5;
'c' denotes colour with image core excluded
-
(b - r) colour of the image bounded
by an isophote of area A where
-
r*(b - r) arcsec = (A/pi)0·5;
'c' denotes colour with image core excluded
-
(r - i) colour of the image bounded
by an isophote of area A where
-
r*(r - i) arcsec = (A/pi)0·5;
'c' denotes colour with image core excluded
-
comments
-
radial velocity (km.s-1); '1' denotes
(Metcalfe, Godwin and Spenser 1987); '2' denotes (Teague and Carter 1990)
The sample is essentially complete to b26·75
= 20·85, with rms deviations in b26·75,
(u - b) and (b - r) of about 0·07, 0·06 and
0·05 mag respectively brightward of b26·75
= 18·9 and 0·15, 0·10 and 0·10 mag respectively
faintward. Where the r* associated with colours are given as zero, colours
were formed by matching radial logarithmic surface brightness profiles
in the respective bands. Full details of the catalogue are given in Metcalfe,
Godwin and Peach 1994.
References
-
Metcalfe N, Godwin JG, Spenser SD. The Shapley
8 cluster of galaxies - redshifts and dynamics. Mon Not R Astr Soc 1987;
225: 581-.
-
Teague P, Carter D. Astrophys J Suppl 1990;
72: 715-.
-
Metcalfe N, Godwin JG, Peach JV. Multicolour
photometry of the Shapley 8 cluster of galaxies. Mon Not R Astr Soc 1994;
267: 431-446.
Links to Data Files
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of Galaxies Page]
[End of document, updated to 5 February
1997]