CYDER: Resource Record Summary

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Resource Record Summary

Catalog Service:
Calan-Yale Deep Extragalactic Research Survey X-Ray Source Catalog

Short name: CYDER IVOA Identifier: ivo://nasa.heasarc/cyderPublisher: NASA/GSFC HEASARC[+]ivo://nasa.heasarc/ASD[Pub. ID] More Info: https://heasarc.gsfc.nasa.gov/W3Browse/all/cyder.html VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2025 May 02 00:00:00Z
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Description

The main goal of the Calan-Yale Deep Extragalactic Research (CYDER) Survey X-ray survey is to study serendipitous X-ray sources detected by Chandra in an intermediate flux range (10<sup>-15</sup> to 10<sup>-12</sup> ergs/s) that comprises most of the X-ray background. A total of 267 X-ray sources spread over five archived fields were detected. The log N - log S distribution obtained for this sample is consistent with the results of other surveys. Deep V and I images were taken of these fields in order to calculate X-ray-to-optical flux ratios. Identifications and redshifts were obtained for 106 sources using optical spectroscopy from 8 m class telescopes to reach the optically faintest sources, to the same level as deeper X-ray fields like the Chandra Deep Fields, showing that the nature of sources detected depends mostly on the optical limit for spectroscopy. This table was created by the HEASARC in March 2007 based on the CDS table J/ApJ/621/104, file table4.dat. This is a service provided by NASA HEASARC .

More About this Resource

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About the Resource Providers

This section describes who is responsible for this resource

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Status of This Resource

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

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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. Reference Coordinate System: UTC-ICRS-TOPOXX[+]ivo://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): , 0.0166666666666667 deg Wavebands covered: X-ray

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.

[+]	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=cyder

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Custom Service

This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.

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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