Chandra X-Ray Observatory

CDA - Data Analysis Links

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
Data Analysis Links
  • CIAO: For analysis of Chandra observations
  • Caldb: Download the Chandra calibration database by ftp
  • Caldb Release Notes: The release notes for the Chandra calibration database
  • Ephemerides: Quick access to Chandra ephemeris files by ftp
  • AGASC1.5: Access to the Chandra Guide Star Catalog
  • NVO: The US National Virtual Observatory
  • Other Archives and Data Centers
    • Astrobrowse at HEASARC or SAO provides a unified search engine to a large number of astronomical archives.

    • HEASARC provides access to a large number of High Energy Astrophysics archives through W3Browse

    • NASA SSDS is NASA's Space Science Data System's depository of Astrophysics data.

    • MAST:HST is the Hubble Space Telescope archive at STScI.

    • IRSA is IPAC's Infra-Red data archive

    • LAMBDA is the Legacy Archive for Microwave Background data at GSFC/NASA.

    • LEDAS is the LEicester Data and Archive Service (UK)

This page maintained by the Chandra Data Archive (

Last modified: 2019-08-26

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