... telescope

Based on observations taken at the Calar Alto Observatory, operated by the Max-Planck-Institut für Astronomie (Heidelberg) jointly with the Spanish National Commission for Astronomy.

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... derived

Tables 1 and 2 (full version) are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

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... STSDAS

IRAF is the Image Analysis and Reduction Facility made available to the astronomical community by the National Optical Astronomy Observatories, which are operated by AURA, Inc., under contract with the U.S. National Science Foundation. STSDAS is distributed by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., under NASA contract NAS5-26555.

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... NED

NASA-IPAC Extragalactic Databasa (NED) is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.

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... 

For VCC galaxies the optical radius is not determined at the 25 mag arcsec^-2 isophote, but at the faintest detectable isophote (see Sect. 3.2).

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