J/ApJ/543/552: Resource Record Summary

Resource Record Summary

Catalog Service:
z>3 damped Ly{alpha} absorption systems

Short name: J/ApJ/543/552 IVOA Identifier: ivo://CDS.VizieR/J/ApJ/543/552 DOI (Digital Object Identifier): 10.26093/cds/vizier.15430552 Publisher: CDS[+]ivo://CDS[Pub. ID] More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/543/552 VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2004 Jun 06 07:23:01Z
	Get XML

Description

We have completed spectroscopic observations using LRIS on the Keck 1 telescope of 30 very high redshift quasars, 11 selected for the presence of damped Ly{alpha} absorption systems and 19 with redshifts z>3.5 not previously surveyed for absorption systems. We have surveyed an additional 10 QSOs with the Lick 120" and the Anglo-Australian Telescope. We have combined these with previous data, resulting in a statistical sample of 646 QSOs and 85 damped Ly{alpha} absorbers with column densities N_HI_>=2 10^20^atoms/cm^2^ covering the redshift range 0.008<=z<=4.694. Four main features of how the neutral gas in the universe evolves with redshift are evident from these data.

More About this Resource

[+]

About the Resource Providers

This section describes who is responsible for this resource

[+]

Status of This Resource

This section provides some status information: the resource version, availability, and relevant dates.

[+]

What This Resource is About

This section describes what the resource is, what it contains, and how it might be relevant.

[+]	Data Coverage Information
	This section describes the data's coverage over the sky, frequency, and time. Wavebands covered: Optical

[+]	Rights and Usage Information
	This section describes the rights and usage information for this data. Rights:

Available Service Interfaces

[+]	Custom Service
	This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource. VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for this service interface: Interactive web page: http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/543/552

[+]	Custom Service
	This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource. VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for this service interface: URL-based interface: http://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/543/552

[+]	Table Access Protocol - Auxiliary ServiceXX
	This is a standard IVOA service that takes as input an ADQL or PQL query and returns tabular data. VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for the standard interface: http://tapvizier.cds.unistra.fr/TAPVizieR/tap

[+] Simple Cone SearchXXSearch Me

This is a standard IVOA service that takes as input a position in the sky and a radius and returns catalog records with positions within that radius.

[+] Simple Cone SearchXXSearch Me

This is a standard IVOA service that takes as input a position in the sky and a radius and returns catalog records with positions within that radius.