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Access to the catalogs and astronomical archives of the HEASARC

Select an interface or start using our keyword search tool below.

HEASARC Data Access

  • Xamin Interfaces
    • Xamin Web InterfaceIntro   
    Our faster and more powerful access to HEASARC data

    Xamin API and Batch Interface
    Access the database with the Xamin application programming interface (API) that can perform all of the same tasks as the UI. You can also use it from your command line.
    Xamin VO Standard APIs
    For the full flexibility of SQL queries to bring complicated query logic directly to the database, you can use our VO APIs. See also tutorials for how to access these APIs in Python.
  • Browse Interfaces   Tips Archive
    • Browse Mission Interface  
    Our full-featured interface
    Browse Table Index
    Listing of all tables in the HEASARC database
    Browse Correlation of 2 Tables
    Correlation of more than 2 tables is available in Xamin
    Browse Notification Service
    Get notified when new data is available in the archive
    Use Xamin if you wish to monitor any query
    Browse Batch InterfaceDownload  
    Perl scripts (by default these now query Xamin database)

  • CMB Data
    • CMB Missions and Projects
    Data from space-bourne and suborbital CMB experiments in LAMBDA
  • Specialized Forms
    • Argus Proposal/Observation Info
    Search Browse proposal information for observation details and status
    Swift Data Query
    Search bursts and observations of the Swift mission

  • Direct Access to HEASARC Archive Directories
    • Command-Line Downloads
    Describes using our download script as well as wget and curl.

    If there is a published astronomical catalog that you would
    like added to the HEASARC, let us know.

    Browse Quick form divider

    Other Resources

    • SkyView - An easy-to-use tool that returns digital images of the sky in any waveband from radio through to gamma rays
    • VAO DataScope - Query catalogs and services from the HEASARC and from around the world using a single form
    • Literature - Links to literature search engines and online versions of refereed journals and science magazines

    Archive Information

    Latest News
  • XMMSTACKOB: 5XMM-DR15 XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Stacked Observations Data Catalog Released (10 Jun 2026)
    The XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Stacked Observations Data provides the list of stacks used for the new 5XMM-DR15 catalog (XMMSTACK). This catalog is now available in both Browse and Xamin.
  • XMMSTACK and XMMSSC-XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Catalogs Released (10 Jun 2026)
    The XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Full (Stacked) Catalog (XMMSTACK) offers a new version of the stacked catalog built from 14,616 5XMM-DR15 observations, including also non-overlapping observations. XMMSTACK is a complete version of the catalog and has one row per source, followed by subsequent rows with information stemming from each detection or upper limit and thus has 3,397,248 rows. The catalog contains 818,656 unique sources, which are provided in the associated table of source detections, XMM-Newton Serendipitous Source Catalog (XMMSSC). Both tables are now available in both Browse and Xamin.
  • XMM-Newton Slew Survey Source Catalogs (Version 3.1) (10 Jun 2026)
    The updated versions of the XMM-Newton Slew Survey "Clean" and "Full" Source Catalogs containing 52,420 and 121,662 X-ray sources, respectively, detected during spacecraft slews are now available in Browse and Xamin.
  • NuSTAR Caldb Update (09 Jun 2026)
    The NuSTAR FPM caldb was updated to version 20260608. This release includes a new clock correction file, v229, using a new temperature model. Please see the release notes for more details.
  • NuSTAR Caldb Update (09 Jun 2026)
    The NuSTAR FPM caldb was updated to version 20260608. This release includes a new clock correction file, v229, using a new temperature model. Please see the release notes for more details.
  • General Catalog of Variable Stars, Version 5.1, December 2025 (03 Jun 2026)
    The latest version of this catalog of 62,221 confirmed variable stars (from Samus et al. 2017, ARep, 61, 80) is now available in both Browse and Xamin, as is an updated version of the related GCVS Suspected Variable Stars Catalog from the same authors.

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