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|Arcsecond Positions of UGC Galaxies|
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
A new list of isolated galaxies has been compiled in order to determinewhether or not a true isolated sample can be selected. The sampleselection and the statistical characteristics of the sample arediscussed. In agreement with previous findings, it is concluded that anunclustered background seems to be observationally and operationallymeaningless, and that clustering dominates in all regions of space.
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