Abell 1146
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Introduction
We present photographic b27 magnitudes,
radii and ellipticities for 410 galaxies within a 13·85 arcmin square
field centred on the cluster Abell 1146.
Data Format
-
internal identification number
-
X position in arcsec, relative to the
peak of the first-ranked galaxy, increasing westwards
-
Y position in arcsec, relative to the
peak of the first-ranked galaxy, increasing northwards
-
b27, integrated blue
(b-band) magnitude within the 27 mag.arcsec-2 isophote;
an asterisk denotes an image cortrected for overlap
-
r*(27) arcsec = (A/pi)0·5
where A is the area enclosed by the 27 b mag.arcsec-2
isophote
-
epsilon = (1 - b/a), the ellipticity
of the image at the 26·5 b mag.arcsec-2 isophote
(a and b denote the major and minor semi-axes respectively) or, in the
event of an overlap (denoted by an asterisk), at the outermost uncontaminated
isophote
-
theta deg, the position angle of
the major axis of the image
-
alpha mag.arcsec-2,
the slope of the logarithmic brightness residuals of the image relative
to the stellar profile
-
gamma mag, the amount by which
the central surface brightness of the image falls short of that which would
have been expected for a stellar image with the same number of points measured
The sample is essentially complete to b27
= 22·0, extending to b27 = 23·5, with rms
deviations in b27 about 0·1 mag. The identifications
of objects 399-410 are not entirely certain.
References
-
Carter D, Godwin JG. Photometry of the
cluster of galaxies Abell 1146. Mon Not R Astr Soc 1979; 187: 711-721.
Links to Data Files
(To be completed)
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[End of document, updated to 26 February 1997]