CRABTIME: Resource Record Summary

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Resource Record Summary

Catalog Service:
Crab Pulsar Timing

Short name: CRABTIME IVOA Identifier: ivo://nasa.heasarc/crabtimePublisher: NASA/GSFC HEASARCivo://nasa.heasarc/ASD[Pub. ID] More Info: https://heasarc.gsfc.nasa.gov/W3Browse/all/crabtime.html VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2024 May 31 00:00:00Z
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Description

The CRABTIME database contains the Crab Pulsar Monthly Ephemeris covering the period from Feb 15 1982 (MJD=45015) to (close to) the present that was created Dr. Andrew Lyne and collaborators at Jodrell Bank Observatory. This database is periodically updated to include recent data as these become available. To assist astronomers, the HEASARC has created two new parameters which were not present in the original Jodrell Bank tables, the pulsar period and its first derivative, using the standard relations between period (P) and frequency 'Nu' (P=1./Nu) and their first derivatives (P_dot = -Nu_dot/Nu<sup>2</sup>). The assumed pulsar position used in the reductions is <pre> RA (1950.0) 05 31 31.406 DEC (1950.0) +21 58 54.391 RA (2000.0) 05 34 31.973 DEC (2000.0) +22 00 52.061 </pre> This HEASARC version of the "Jodrell Bank Crab Pulsar Timing Results, Monthly Ephemeris" is updated within one week of any changes to the tables available on the Web at <a href="http://www.jb.man.ac.uk/pulsar/crab.html">http://www.jb.man.ac.uk/pulsar/crab.html</a>. This is a service provided by NASA HEASARC .

More About this Resource

About the Resource Providers

This section describes who is responsible for this resource

Publisher: NASA/GSFC HEASARCivo://nasa.heasarc/ASD[Pub. ID]

Creator: Lyne, Jordan, Roberts Contributor:

Contact Information:

X NASA/GSFC HEASARC help desk
Email:

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: 2024 May 31

This resource was registered on: 2024 May 31 00:00:00Z
This resource description was last updated on: 2024 May 31 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: Archive	Subject keywords: Pulsar This service provides data from: facility: STAR CATALOG
Intended audience or use: Research: This resource provides information appropriate for supporting scientific research.
More Info: https://heasarc.gsfc.nasa.gov/W3Browse/all/crabtime.html	Literature Reference:
Related Resources: Services that provide access to data in this resource: HEASARC TAP ivo://nasa.heasarc/services/xamin [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. Typical Size Scale (Region of Regard): , 0.0833333333333333 deg Wavebands covered: Radio

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:

https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=crabtime&

Maximum search radius accepted: 180 degrees
Maximum number of matching records returned: 99999

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

	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: https://heasarc.gsfc.nasa.gov/xamin/vo/tap

	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: https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=crabtime

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: https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_crabtime&Action=More+Options&Action=Parameter+Search&ConeAdd=1

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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