NOMAD: Resource Record Summary

Resource Record Summary

Catalog Service:
NOMAD Catalogue

Short name: NOMAD IVOA Identifier: ivo://fs.usno/cat/nomadPublisher: United States Naval Observatory, Flagstaff Station ivo://fs.usno/org[Pub. ID] More Info: http://www.nofs.navy.mil/nomad VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2005 Mar 29 20:41:21Z
	Get XML

Description

The U.S. Naval Observatory (USNO) announces the release of the first version of the Naval Observatory Merged Astrometric Dataset (NOMAD). The 100 GB dataset contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos, Tycho-2, UCAC2, and USNO-B catalogs for astrometry and optical photometry, supplemented by 2MASS near-infrared photometry. For each unique star the "best" astrometric and photometric data are chosen from the source catalogs and merged into a single dataset. A sequence of priorities is followed and NOMAD contains flags to identify the source catalogs and gives cross-reference identifications. This first release of NOMAD is not a compiled catalog; that is, if a star is identified in more than 1 of the above mentioned catalogs, only 1 catalog entry is chosen. Thus the local and global systematic errors of the various source catalogs will be present in this version of NOMAD. All source catalogs astrometric data are on the International Celestial Reference System within the limitations of the source catalogs. For more information and data retrieval see our homepage www.nofs.navy.mil/nomad.

More About this Resource

About the Resource Providers

This section describes who is responsible for this resource

Publisher: United States Naval Observatory, Flagstaff Station ivo://fs.usno/org[Pub. ID]

STScI Archivearchive@stsci.edu

Contact Information:

X S. Levine
Email: mailto:sel at nofs.navy.mil

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 apparently provides only public data

Relevant dates for this Resource:

Representative: 2005 Mar 29

This resource was registered on: 2005 Mar 29 20:41:21Z
This resource description was last updated on: 2007 Apr 11 08:52:38Z

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: astrometric catalogue optical astronomy finding charts photographic images
Intended audience or use: Secondary Education: This resource provides information appropriate for use in elementary education (e.g. approximate ages 14-18). Community College: This resource provides information appropriate for use in community/junior college or early university education. University: This resource provides information appropriate for use in university education. Research: This resource provides information appropriate for supporting scientific research. Amateur: This resource provides information of interest to amateur astronomers.
More Info: http://www.nofs.navy.mil/nomad	Literature Reference: 2004AAS...205.4815Z
Related Resources: This resource is derived from: USNO-B1 Catalogue ivo://fs.usno/cat/usnob [Res. ID]

Data Coverage Information

This section describes the data's coverage over the sky, frequency, and time.

Reference Coordinate System: UTC-ICRS-TOPOXXivo://STClib/CoordSys#UTC-ICRS-TOPO[Res. ID]

Sky Coverage: Regions covered:

All-sky: The data from this resource is distributed over the entire sky.

Spectral Coverage:

3.5e-06 - 2.2e-06 m

Wavebands covered:

Infrared
Optical

Temporal Coverage:

1949-01-01T00:00:00.0Z - 2002-01-01T00:00:00.0Z

Available Service Interfaces

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.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for the standard interface:

http://www.nofs.navy.mil/cgi-bin/vo_cone.cgi?CAT=NOMAD&

Maximum search radius accepted: 1.0 degrees
Maximum number of matching records returned: 100000

This service supports the VERB input parameter:: Use VERB=1 to minimize the returned columns or VERB=3 to maximize.