Quasar Absorption Line Survey - Cycle 3 High - Part 2

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Hst Proposal Id #5081

Scientific paper

PART 2 consists of replacement targets for objects pulled from the original submission because targets had been previously observed in other programs. The Absorption Line Survey of bright quasars provides a homogeneous data base for studying fundamental questions about the origin and evolution of gaseous systems in the universe. The initial results determine at small redshifts the number densities of Ly-ALPHA systems, of metal-lines and extragalactic halos, of Lyman-limit systems, of associated absorption systems, and the shapes and intensities of quasar emission lines and spectral energy distributions. The survey reveals that much of the sky is covered by high or very high velocity metal-line clouds present in the Galactic halo. A larger sample, which includes the requested Cycle 3 observations, is required to answer many important questions. (See abstract_temp for Part 1, P4581)

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