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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
  • Required work plan moved to Expertise and Resources document (30 Jul 2026)
    IXPE Cycle 4 proposers should note that the required one paragraph work plan has been moved to the Non-anonymized Expertise and Resources (E&R) document and should be non-anonymized. Consequently, the page limit for the E&R document has now been increased to 2 pages. For more information, please visit the Cycle 4 proposal guide. For any questions about proposal submission and guidelines, please contact the IXPE help desk.
  • Chandra Source Catalog Stacked Observation Detections (CSCSTACK), v2.1.1 Released (28 Jul 2026)
    The Chandra Source Catalog's Stacked Observation Detections Table (CSCSTACK) includes 493,236 detections (855,402 total entries consisting of detections plus photometric upper limits) based on 10,034 stacks of X-ray observations. The stacked-observation level allows composite properties to be reported from the co-added observations for detections that would otherwise not be visible or have poor S/N in individual observations, while for higher S/N detections the per-observation properties facilitate analysis of variable sources. The CSCSTACK table is available in Browse and Xamin.
  • Swift SC CALDB updated (06 Jul 2026)
    The Swift SC has been updated to version 20260702 to update the clock correction file to v173 ...
  • NuSTAR Caldb Update (02 Jul 2026)
    The NuSTAR FPM caldb was updated to version 20260630. This release includes a new clock correction file, v230, using a new temperature model. Please see the release notes for more details.
  • NuSTAR Caldb Update (02 Jul 2026)
    The NuSTAR FPM caldb was updated to version 20260630. This release includes a new clock correction file, v230, using a new temperature model. Please see the release notes for more details.
  • IXPE Caldb Updated (29 Jun 2026)
    The IXPE Caldb has been updated for the GPD (version 20260610) and XRT (version 20260609). Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access.

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    Last modified: Monday, 21-Apr-2025 17:48:34 EDT
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