J/A+AS/124/283 J/A+AS/124/283 BR magnitude and redshift of A1300 M Pierre J Oukbir D Dubreuil G Soucail J -L Sauvageot Y Mellier Astron. Astrophys. Suppl. Ser. 124 283 1997 1997A&AS..124..283P Clusters, galaxy Magnitudes Redshifts galaxies: clusters: individual (Abell 1300) galaxies: distances and redshifts X-rays: galaxies We present the first results of an optical follow-up of X-ray bright clusters of galaxies located between 0.15<=z<=0.31: 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 1210km/s, based on 52 cluster members. Structures are observed in the galaxy number counts but the velocity histogram shows no significant departure from a Gaussian distribution.

ACO 130011 32.0 -19 54

xpos x distance from the field center (cD) number=1 1 pix = 0.314" pix ypos y distance from the field center (cD) number=1 1 pix = 0.314" pix Rmag R magnitude (average between 2 frames) mag B-R B-R colour index (average between 4 frames) mag Rmorph Morphological class in the R band (see text) --- No Internal number referring to Fig.7, 8 --- n_No Note on No number=1 *: Presence of emission lines: 101: H_{alpha} 103: H_{alpha} 115: [OII] at 3727, H_{beta}, [OIII] at 4959 and 5007, OI at 6300 and 6364, H_{alpha}, NII at 6549 and 6583, SII at 6717 and 6734 205: H_{alpha}, H_{beta}? 225: OI at 6300 and 6364 320: H_{alpha}? 321: H_{alpha}? SII at 6717 n: The two nuclei of the cD galaxy correspond to numbers 121 & 219 and show totally similar redshifts at the present spectroscopic resolution. --- RAdeg Right ascension (J2000) number=2 Galaxy positions were interactively measured on the STScI digitized blue sky survey images having a pixel size of 1.7", and should have an accuracy of ~3.4" deg DEdeg Declination (J2000) number=2 Galaxy positions were interactively measured on the STScI digitized blue sky survey images having a pixel size of 1.7", and should have an accuracy of ~3.4" deg z Redshift --- e_z Error on the redshift --- q_z z measurement quality number=3 1: highest peak in the correlation function, 2: 2nd peak, 9: interactive measurement with lines --- Rmag R magnitude (only for galaxies within the area processed for photometry) mag B-R B-R colour index mag Member Cluster member galaxy (3sigma clipping method) --- tables.texLaTeX version of the tables Patricia Bauer CDS 1997Jan24Marguerite Pierre <mpierre@discovery.saclay.cea.fr> J_A+AS_124_283.xml