A photometric catalogue of galaxies in the cluster Abell 496 ^*,**

¹ Observatoire de la Côte d'Azur, BP. 229, F-06304 Nice Cedex 4, France
² Institut d'Astrophysique de Paris, CNRS, Université Pierre et Marie Curie, 98bis Bd. Arago, F-75014 Paris, France
³ DAEC, Observatoire de Paris, Université Paris VII, CNRS (UA 173), F-92195 Meudon Cedex, France
⁴ CAI et Observatoire de Paris, 61 avenue de l'Observatoire, F-75014 Paris, France
⁵ Osservatorio Astronomico di Brera, via Brera 28, I-20121 Milano, Italy

Send offprint request to: E. Slezak

Received: 8 February 1999
Accepted: 26 August 1999

Abstract

We present two catalogues of galaxies in the direction of the rich cluster Abell 496 . The first one includes 3879 galaxies located in a region of roughly ± 1.3° from the cluster centre. It has been obtained from a list of more than 35000 galaxy candidates detected by scanning part of a Schmidt photographic plate taken in the b_J band. Positions are very accurate in this catalogue but magnitudes are not. This led us to perform CCD imaging observations in the V and R bands to calibrate these photographic magnitudes. A second catalogue gives a list of galaxies with CCD magnitudes in the V (239 galaxies) and R (610 galaxies) bands for a much smaller region in the centre of the cluster. These two catalogues will be combined with a redshift catalogue of 466 galaxies [(Durret et al. 1999)] to investigate the cluster properties at optical wavelengths (Durret et al. in preparation), as a complement to previous X-ray studies by a member of our group [(Pislar 1998)].