HYPERLEDA

Free access article

Issue		A&A Volume 412, Number 1, December II 2003


Page(s)		45 - 55
Section		Galactic structure and dynamics
DOI		http://dx.doi.org/10.1051/0004-6361:20031411

A&A 412, 45-55 (2003)
DOI: 10.1051/0004-6361:20031411

I. Identification and designation of galaxies

G. Paturel¹, C. Petit¹, Ph. Prugniel¹, G. Theureau², J. Rousseau¹, M. Brouty¹, P. Dubois³ and L. Cambrésy³

¹ Observatoire de Lyon, avenue Charles-André, 69561 Saint-Genis Laval Cedex, France
² LPCE, 3A avenue de la recherche scientifique, 45071 Orléans Cedex 02, France
³ CDS, Observatoire de Strasbourg, 11 rue de l'Université, 67000 Strasbourg, France

(Received 25 March 2003 / Accepted 29 July 2003 )

Abstract
We present the new catalog of principal galaxies (PGC2003). It constitutes the framework of the HYPERLEDA database that supersedes the LEDA one, with more data and more capabilities. The catalog is still restricted to confirmed galaxies, i.e. about one million galaxies, brighter than $\approx$ 18 B-mag.

In order to provide the best possible identification for each galaxy we give: accurate coordinates (typical accuracy better than 2 arcsec), diameter, axis ratio and position angle. Diameters and axis ratios have been homogenized to the RC2 system at the limiting surface brightness of $25 B-{\rm mag~arcsec}^{-2}$ , using a new method, the EPIDEMIC method.

In order to provide the best designation for each galaxy, we collected the names from 50 catalogues. The compatibility of the spelling is tested against NED and SIMBAD, and, as far as possible we used a spelling compatible with both. For some cases, where no consensus exists between NED, SIMBAD and LEDA, we propose some changes that could make the spelling of names fully compatible.

The full catalog is distributed through the CDS and can be extracted from HYPERLEDA.

Key words: galaxies: general -- catalogs

Offprint request: G. Paturel, patu@obs.univ-lyon1.fr

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