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An image database. II. Catalogue between δ=-30deg and δ=70deg.
A preliminary list of 68.040 galaxies was built from extraction of35.841 digitized images of the Palomar Sky Survey (Paper I). For eachgalaxy, the basic parameters are obtained: coordinates, diameter, axisratio, total magnitude, position angle. On this preliminary list, weapply severe selection rules to get a catalog of 28.000 galaxies, wellidentified and well documented. For each parameter, a comparison is madewith standard measurements. The accuracy of the raw photometricparameters is quite good despite of the simplicity of the method.Without any local correction, the standard error on the total magnitudeis about 0.5 magnitude up to a total magnitude of B_T_=17. Significantsecondary effects are detected concerning the magnitudes: distance toplate center effect and air-mass effect.
| A redshift survey of the poor cluster A1142
A nearly complete redshift survey of the galaxy cluster A1142 over a 2sq deg region which includes the central 0.7 Mpc of the cluster ispresented which includes 63 new redshifts. Of the 60 galaxies in theregion brighter than m(v) = 16.5, about 40 percent are either foregroundor background to the cluster. For the 35 cluster members, amass-to-light ratio of 520 solar masses/solar luminosities is derived,consistent with the results for other well-studied systems.
| A catalog of morphological types in 55 rich clusters of galaxies
Data are presented from a study of 55 rich clusters of galaxies. Thedata include positions, morphological types, estimated total magnitudes,bulge sizes, and ellipticities for about 6000 galaxies, as determinedfrom high scale photographic plates. Data reduction procedures aredescribed, and a brief analysis of cluster richness, which indicatesthat Abell richness classes are only rough indicators of total clustermembership, is included.
| Catalogue no.10 of nebulae discovered at the Warner observatory.
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