Chandra X-Ray Observatory

CDA - Search and Retrieval Options

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
Search and Retrieve Chandra Data Products

The CDA has a variety of tools available for accessing Chandra data:


A web-based application providing access to proprietary and public data. Search criteria must be entered individually, but ChaSeR provides the most detailed search results, including quick-look images, V&V reports, and links to processing status and publications tracked by the CDA operations group. Data packages are downloaded to an ftp staging area.

The primary and secondary data products of all public Chandra observations accessible from an anonymous ftp site
Chandra Fast Image
A simplified interface that allows the general public as well as professional astronomers quick access to images and event files

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.