A&A Supplement Ser., Vol. 124, August 1997, 283-289

Received July 22; accepted November 6, 1996

Spectroscopic and photometric study of the bright X-ray cluster A1300

M. Pierre - J. Oukbir - D. Dubreuil - G. Soucail - J.-L. Sauvageot - Y. Mellier

Send offprint request: M. Pierre mpierre@ariane.saclay.cea.fr

  CEA Saclay DSM/DAPNIA, Service d'Astrophysique, F-91191 Gif sur Yvette, France
  Observatoire Midi-Pyrénées, Laboratoire d'Astrophysique de Toulouse, UMR 5572, 14 Avenue E. Belin, F-31400 Toulouse, France
  Institut d'Astrophysique, 98bis Bd. Arago, F-75014 Paris, France

Abstract:

We present the first results of an optical follow-up of X-ray bright clusters of galaxies located between : B and R photometry as well as medium resolution spectroscopy of the galaxies. The cluster studied here - A1300 - is found to have a redshift of 0.3072 and a velocity dispersion of 1210 km/s, based on 52 cluster members. Structures are observed in the galaxy number counts but the velocity histogramme shows no significant departure from a Gaussian distribution.

keywords: galaxies: clusters: individual: Abell 1300 -- X-rays: galaxies -- galaxies: redshifts

 
• 1. Introduction
• 2. Observations
• 3. Photometry
• 4. Spectroscopy
• 5. Conclusions
• References