Chandra X-Ray Observatory

CDA - Data Services

CDA Status
  • The archive is fully functional.
Reprocessing Status
  • Reprocessing has been completed for
    • Phase I: 2005-11-13 to 2011-12-31
    • Phase II: 2000-01-30 to 2005-11-13
Current Software Releases
  • ASCDSVER: 10.8.1
  • Chandra Footprint Service
    The new secure Footprint Service can be found here
  • Global Chandra Coverage
    Check out the new Chandra MOC page.
  • Browsers security warnings
    Are Chandra Data Archive pages safe? See full announcement.
  • Past Notices
Services for Accessing Additional Chandra Products

The CXC has several data services for accessing Chandra data beyond the direct observational datasets:

  • Chandra Footprint Service: Provides a graphical view of Chandra Sky Coverage.
  • Chandra MOCs: Multi-Order Coverage maps (MOCs) for public Chandra observations, that can be used to visualize and analyze the global Chandra footprint.
  • Chandra Source Catalog: The Chandra Source Catalog was released on 4 March 2009
  • SDSS Cross-Match Service: A cross-matching service linking Chandra and SDSS sources.
  • Bibliography: Search the literature for Chandra-related papers, using the CDA bibliography database.

This page maintained by the Chandra Data Archive (

Last modified: 2019-08-26

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The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA.   Email: Smithsonian Institution, Copyright © 1998-2017. All rights reserved.