Carnegie Observatories

The Sloan Digital Sky Survey: Technical Summary

The Sloan Digital Sky Survey (SDSS) will provide the data to support detailed investigations of the distribution of luminous and nonluminous matter in the universe: a photometri...

Insertional Mutagenesis of the <i>Drosophila</i> Genome with Single P Elements

A versatile genetic method for identifying and cloning Drosophila melanogaster genes affecting any recognizable phenotype is described. Strains are constructed in which the inse...

High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data

We present photometric and spectroscopic observations of 15 high-redshift quasars (z > 3.6) discovered from ~140 deg^2 of five-color (u'g'r'i'z') imaging data taken by the Sloan...

Evolution of mitochondrial DNA sequences in Xenopus

The large, bright QSO survey. V - QSOs in three southern fields

Results from three UK Schmidt Telescope fields are presented in which 200 QSOs have been found, 182 of which form part of the LBQS sample. Coordinates, magnitudes, redshifts, an...

UThPb systematics and the age of the Onverwacht Series, South Africa