J/A+A/530/A50: Resource Record Summary

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Resource Record Summary

Catalog Service:
Principal Component Analysis of QSO UV spectra

Short name: J/A+A/530/A50 IVOA Identifier: ivo://CDS.VizieR/J/A+A/530/A50 DOI (Digital Object Identifier): 10.26093/cds/vizier.35300050 Publisher: CDSivo://CDS[Pub. ID] More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/530/A50 VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2011 May 06 09:24:08Z
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Description

From a principal component analysis (PCA) of 78 z~3 high-quality quasar spectra in the SDSS-DR7 we derive the principal components that characterize the QSO continuum over the full available wavelength range. The shape of the mean continuum is similar to that measured at low-z (z~1), but the equivalent width of the emission lines is larger at low redshift. We calculate the correlation between fluxes at different wavelengths and find that the emission line fluxes in the red part of the spectrum are correlated with those in the blue part. We construct a projection matrix to predict the continuum in the Lyman{alpha} forest from the red part of the spectrum.

More About this Resource

About the Resource Providers

This section describes who is responsible for this resource

Publisher: CDSivo://CDS[Pub. ID]

Creators:

Paris I.Petitjean P.Rollinde E.Aubourg E.Busca N.Charlassier R.Delubac T.Hamilton J.-C.Le Goff J.-M.Palanque-Delabrouille N.Peirani S.Pichon C.Rich J.Vargas-Magana M.Yeche C.

Contact Information:

X CDS support team
Email: cds-question at unistra.fr
Address: CDS
Observatoire de Strasbourg
11 rue de l'Universite
F-67000 Strasbourg
France

Status of This Resource

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

Version: n/a
Availability: This is an active resource.

This service provides only public data.

Relevant dates for this Resource:

Updated: 2011 Jul 15 15:27:10Z
Created: 2011 May 06 09:24:08Z

This resource was registered on: 2011 May 06 09:24:08Z
This resource description was last updated on: 2021 Oct 21 00:00:00Z

What This Resource is About

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

Resource Class: CatalogService: This resource is a service that provides access to catalog data. You can extract data from the catalog by issuing a query, and the matching data is returned as a table.

Resource type keywords: Catalog	Subject keywords: Astronomical models Quasars Spectroscopy Ultraviolet astronomy
Intended audience or use: Research: This resource provides information appropriate for supporting scientific research.
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/530/A50	Literature Reference: 2011A&A...530A..50P
Related Resources: Other Related Resources TAP VizieR generic service(IsServedBy) ivo://CDS.VizieR/TAP [Res. ID]

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

	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/A+A/530/A50

	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/A+A/530/A50

	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

Developed with the support of the National Science Foundation
under Cooperative Agreement AST0122449 with the Johns Hopkins University
The NAVO project is a member of the International Virtual Observatory Alliance

This NAVO Application is hosted by the Space Telescope Science Institute

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