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   <TITLE>Abell 426 (Perseus Cluster)</TITLE>
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<H1>
<FONT FACE="Arial,Helvetica">Abell 426 (Perseus Cluster)</FONT></H1></CENTER>
<FONT FACE="Arial,Helvetica"><A HREF="clusters.htm">[Return to the Clusters
of Galaxies Page]</A></FONT>&nbsp;
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<H2>
<FONT FACE="Arial,Helvetica">Introduction</FONT></H2>
<FONT FACE="Arial,Helvetica">We present photographic V<SUB>25</SUB> magnitudes
for 233 galaxies within a ... arcmin square field centred on the cluster
Abell 426.</FONT>
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<H2>
<FONT FACE="Arial,Helvetica">Data Format</FONT></H2>

<OL>
<LI>
<FONT FACE="Arial,Helvetica">identification number</FONT></LI>

<LI>
<FONT FACE="Arial,Helvetica">X co&ouml;rdinate in 1&middot;679 arcsec
steps increasing westwards from arbitrary origin</FONT></LI>

<LI>
<FONT FACE="Arial,Helvetica">Y co&ouml;rdinate in 1&middot;679 arcsec
steps increasing northwards from arbitrary origin</FONT></LI>

<LI>
<FONT FACE="Arial,Helvetica">V<SUB>25</SUB>, integrated V-band magnitude
within the 25 V mag.arcsec<SUP>-2</SUP> isophote</FONT></LI>

<LI>
<FONT FACE="Arial,Helvetica">notes</FONT></LI>
</OL>
<FONT FACE="Arial,Helvetica">The internal precision of the magnitudes as
determined by repeated scans is about 0&middot;09 mag in V<SUB>25</SUB>.
The sample is essentially complete brightward of V<SUB>25</SUB> = 17&middot;0.</FONT>
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<H2>
<FONT FACE="Arial,Helvetica">References</FONT></H2>

<UL>
<LI>
<FONT FACE="Arial,Helvetica">Bucknell MJ, Godwin JG, Peach JV. Studies
of rich clusters of galaxies - V. Photometry and luminosity functions for
eight clusters. Mon Not R Astr Soc 1979; 188: 579-593.</FONT></LI>

<LI>
<FONT FACE="Arial,Helvetica">Godwin JG. Clusters of galaxies. DPhil
thesis, Oxford 1976.</FONT></LI>
</UL>

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<H2>
<FONT FACE="Arial,Helvetica">Links to Data Files</FONT></H2>
<I><FONT FACE="Arial,Helvetica">(To be completed)</FONT></I>&nbsp;
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<BR><FONT FACE="Arial,Helvetica"><A HREF="clusters.htm">[Return to the Clusters
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<BR><FONT FACE="Arial,Helvetica">[End of document, updated to 25 April 1997]</FONT>&nbsp;

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