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We present accurate B1950 and J2000 positions for all confirmed galaxies in the Uppsala General Catalog (UGC). The positions were measured visually from Digitized Sky Survey images with rms uncertainties σ ≤ [(1 2) 2 + (θ/100) 2 ] 1/2 , where θ is the major-axis diameter. We compared each galaxy measured with the original UGC description to ensure high reliability. The full position list is available in the electronic version only.
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Cotton et al. (1999) studied this question.
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