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Resource Record Summary

Catalog Service:
XAO AGN Flux Monitoring Data

Short name: liujun_web IVOA Identifier: ivo://xaovo/liujun/liujun/qPublisher: Xinjiang Astronomical Observatory,CAS More Info: http://data.xao.ac.cn/liujun/liujun/q/info VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2015 Sep 06 12:00:00Z
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Description

Active Galactic Nuclei (AGNs) are extragalactic objects characterized by extremely complex physical processes and strong temporal flux variability over almost the whole electromagnetic spectrum, which play a very important role in studying the formation and evolution of galaxies, cosmology and many other astrophysical problems. Flux variability is one of the most remarkable observational characteristics of AGNs and the variability time scales are from minutes to dozens of years. Multi-wavelength flux monitoring is the main means to study the nature of AGN flux variability. In order to systematically study the total flux variability of AGNs in radio band, we launched a long-term program, which is called the quasi- Simultaneous Multiwavelength Monitoring of AGNs with the Nanshan 26-m radio telescope of Xinjiang Astronomical Observatory (XAO), namely SMMAN program. The monitoring data were acquired monthly with the cross-scan mode at C-band (4.8 GHz) and K-band (23.6 GHz) for a sample of about 100 AGNs selected from Fermi-LAT suvery. Additionally, we also conducted weekly monitoring observations or Intra-Day Vairibility (IDV) observations for some of flaring Blazars to reveal their more complex variability time scales.

More About this Resource

About the Resource Providers

This section describes who is responsible for this resource

Publisher: Xinjiang Astronomical Observatory,CAS

Creator: Zhang Hailong, Cui Lang

Contact Information:

X Zhang Hailong
Email: zhanghailong at xao.ac.cn
Address: 150 Science 1-Street
Urumqi
Xinjiang 830011
China

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.

Relevant dates for this Resource:

Updated: 2024 Feb 04 05:22:02Z

This resource was registered on: 2015 Sep 06 12:00:00Z
This resource description was last updated on: 2024 Feb 04 13:22:02Z

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: none provided	Subject keywords: Intra-day Variablility Active Galactic Nuclei
Intended audience or use: none specified
More Info: http://data.xao.ac.cn/liujun/liujun/q/info
Related Resources: Other Related Resources XAO Data Center TAP service(IsServedBy) ivo://xaovo/tap [Res. ID]

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

	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://data.xao.ac.cn/liujun/liujun/q/form

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://data.xao.ac.cn/liujun/liujun/q/scs.xml?

Maximum search radius accepted: 180 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.

	VOSI AvailabilityXX
	This is a standard IVOA service endpoint that returns information about the availability and uptime of the main IVOA standard service. VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for the standard interface: http://data.xao.ac.cn/liujun/liujun/q/availability

	VOSI CapabilitiesXX
	This is a standard IVOA service endpoint that returns the detailed capabilities of the main IVOA standard service. VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for the standard interface: http://data.xao.ac.cn/liujun/liujun/q/capabilities

	VOSI TablesXX
	This is a standard IVOA service endpoint that returns information about the table schema managed by the main IVOA standard service. VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for the standard interface: http://data.xao.ac.cn/liujun/liujun/q/tableMetadataX(version 1.1 compatible)

	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://data.xao.ac.cn/tapX(version 1.1 compatible)

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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