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Galaxy coordinates. II. Accurate equatorial coordinates for 17298 galaxies
Using images of the Digitized Sky Survey we measured coodinates for17298 galaxies having poorly defined coordinates. As a control, wemeasured with the same method 1522 galaxies having accurate coordinates.The comparison with our own measurements shows that the accuracy of themethod is about 6 arcsec on each axis (RA and DEC).
| A catalogue of velocities in the direction of the cluster of galaxies Abell 496
We present a catalogue of velocities for 466 galaxies in the directionof the cluster Abell 496, in a region covering about 160'x 160' (9.2x9.2Mpc for an average redshift for Abell 496 of 0.0331, assuming H_0 = 50km s-1 Mpc-1). This catalogue includes previouslypublished redshifts by \cite[Proust et al. (1987)]{pro87},\cite[Quintana & Ramírez (1990)]{qui90} and \cite[Malumuth etal. (1992)]{mal92}, redshifts from the CfA redshift survey, togetherwith our new measurements. A total of 274 galaxies have velocities inthe 7800-11800 km s-1 interval, and will be considered asmembers of the cluster. Abell 496 therefore becomes one of the fewclusters with a high number of measured redshifts; its physicalproperties are investigated in a companion paper. Based on observationscollected at the European Southern Observatory, La Silla, Chile. Tables3 and 4 are only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
| The morphological catalogue of galaxies equatorial survey
We present 865 redshifts of galaxies located in the equatorial stripdelta between -17.5 deg and -2.5 deg in the right ascension rangebetween 20 h and 5 h. Redshifts have been obtained for the completesample of all 833 galaxies in the Morphological Catalog of Galaxies withmagnitudes brighter than m = 14.5 (corresponding approximately tom(Zwicky) = 15.0). This sample also includes three galaxies from othersources with more reliable magnitudes, satisfying this limit, and 29fainter galaxies, usually companions of the galaxies in the magnitudelimited sample. Our maps of a very large volume of nearby spacedemonstrate a variety of coherent large scale structures which includelarge voids, 20-50/h Mpc in diameter and large walls at least 70/h Mpcacross.
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