Astron. Astrophys. Suppl. Ser. 139, 559-563

A photometric catalogue of galaxies in the cluster Abell 496

E. Slezak ¹ - F. Durret ^2,3 - J. Guibert ⁴ - C. Lobo ⁵

Send offprint request: E. Slezak, e-mail: slezak@obs-nice.fr

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

Received February 8; accepted August 26, 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 $\pm$ 1.3$^\circ$ 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 $b_{\rm J}$ 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).

Key words: galaxies: clusters: individual: Abell 496; galaxies: clusters of